Makita 2450 Rotary Hammer Gear Assembly

General characteristics

"Makita 2450" It is known among builders and repairmen as a rather functional professional tool. It is simple and reliable in operation, has lightness and good balance. Thereby "Makita 2450" will last quite a long time. It has a good dust protection system, which makes the operation of the equipment durable.

Makita 2450 Rotary Hammer Gear Assembly

Its popularity is explained by the possibility of repairing the hammer drill. "Makita 2450" at home. You do not need to spend a lot of money on its maintenance. However, before the punch assembly process "Makita 2450" you should familiarize yourself with the technology of its disassembly and repair.

Specifications

A punch has a certain set of qualities "Makita 2450". The specifications provided by the manufacturer in the instructions are as follows.

Makita 2450 Rotary Hammer Gear Assembly

The weight of the tool is only 2.4 kg. The drill mounts are provided by the SDS system. The rotary hammer is designed for crushing, drilling and hammer drilling. He has three modes of operation. The number of idle revolutions is 1100 per minute, and the maximum number of strokes is 4500 per minute. The strength of the translational motion at the maximum is 2.7 J. The maximum drilling diameter:

  • for wood. 32 mm;
  • for metal. 13 mm;
  • for concrete. 24 mm;
  • for a hollow crown. 54 mm.

There are also additional functions for the punch. "Makita 2450". The characteristics highlight the presence of a safety clutch, reverse, lock power button, as well as electronic speed control.

Power supply network is 780 watts. The cable length is 4 m.

Signs of a fake

Due to the great popularity of the equipment presented, cases of counterfeiting are not uncommon. There are characteristic features that determine the fake HR 2450 hammer drill. These include a short cord (about 0.5 m). The letters on the black clasps of the suitcase are matte for the fake, and the letters for the original are shiny.

In the photo of the punch in the instructions for this product, the background is light gray, almost white. The copy will have a dark, dull background color.

If Japan is indicated as the manufacturer on the HR 2450 case, this is not a real tool. The original says: "Made in P.R.C."i.e. "Made in China".

"Makita 2450" includes a rubberized handle on which the serial number is indicated. All details of the suitcase must also contain each designation. In a fake, the handle is not made of rubber, but of plastic. This should also be a signal of the need to refuse to purchase such a tool.

Disassembly scheme

In the process of repairing the presented equipment, the user must be able to disassemble the tool. Punch assembly diagram "Makita 2450" has many nodes and elements. To carry out repairs, you should not know all of them. Here are the most basic elements that the diagram represents ("Makita 2450". the device is very complex).

Makita 2450 Rotary Hammer Gear Assembly

The first is the snap ring. It is involved in the process of dismantling the cartridge cover. Next is an annular locking device. It holds the ball to fix the drill. Its guides are the washer and conical spring.

4 screws connect the gearbox to the motor. There are many rubber parts in the circuit which, when worn, become a common cause of breakage.

This knowledge is enough to carry out repairs at home. Next, you should familiarize yourself with the technique of its implementation.

The feasibility of self-repair

Rotary hammer repair "Makita 2450" do it yourself for several reasons.

Makita 2450 Rotary Hammer Gear Assembly

Representatives of a service center troubleshoot a specific algorithm. This leads to a rather large cost of repairing the tool.

It is also likely that the company’s representatives will conduct a routine inspection, the need for which is doubtful. And you still have to pay for it.

If the unit or several of them still require replacement, the service staff will supply only licensed parts "Makita 2450". Repair in this case may be comparable in value to the purchase of a new tool. All these facts speak in favor of self-tuning or replacing equipment parts.

Repairs

"Makita 2450" do it yourself with certain knowledge and skills. The technology for inspecting and replacing parts for the HR 2450 is fairly straightforward. It involves disassembling the tool, after which all old grease, dust, and dirt are removed. Damaged components are replaced with new ones. Then all the details of the punch are assembled together. It is necessary to familiarize yourself with each item of such work. They can be made in the area of ​​a cartridge, a mode switch, a perforator case.

Makita 2450 Rotary Hammer Gear Assembly

To carry out repairs, first remove the cartridge, then the speed switch. After that, repairs are carried out inside the case. Lubricant and worn rubber elements are replaced.

Cartridge

With a flat screwdriver, the cartridge is disassembled. Rotary hammer repair "Makita 2450" do it yourself with this element. Squeezing the lid of the cartridge, remove the rubber boot. The snap ring is dismantled. Then the lid of the cartridge and the metal ring are removed. It locks the drill fixation ball in the barrel. It is taken out, and the metal washer, conical spring get without effort.

The cause of the breakdown may be wear of parts. It is detected if the drill does not automatically snap in without pressing the cover. After checking all the details, they identify the cause of the breakdown. Old elements are cleaned of dirt and old grease. The ball is densely treated with new oil. The conical spring is installed with the narrow side to the resistor.

The guide washer should press it so that it is below the hole in the barrel. Rotary hammer repair "Makita 2450" with the cartridge area requires fixing the ball in the hole. All parts are assembled in reverse order.

Mode switch

To disassemble, remove the T-shaped latch on the handle of the switch. Use a 2 mm screwdriver for this. It is very necessary to tighten the tabs of the latch. She is pulled out. The red lock must be held so that it does not fly out under the action of the spring.

Makita 2450 Rotary Hammer Gear Assembly

After carrying out these steps, the switch knob should be turned to the leftmost position. So its protrusions will coincide with the grooves of the editor’s case. The switch is easily removable. The latch is pulled out with the spring. The rubber ring on the handle of the switch should be pry off with a thin screwdriver and remove it. It prevents grease from escaping from the housing.

Punch assembly diagram "Makita 2450" in the field of the switch assumes a certain sequence of conduct. All parts and the seat are cleaned of old dirt. Thoroughly grease two metal pins and a rubber ring. They put it on the switch. A spring is inserted into the handle, then a latch. It should not pop up when a latch is installed in the housing.

Then the switch is inserted into the gearbox. In this case, the handle is sent to the sector between the designation of the combined mode and impact. However, he will not be inserted until the end. The switch should be turned to the drilling mode and a little further. In this case, do not forget to press the latch button so that it does not interfere with the movement.

Then turn the switch clockwise and push the latch to the end.

Switch malfunctions

In the process of getting acquainted with the question of how to assemble "Makita 2450", you should find out the frequent malfunctions of the switch. They can be caused by wear on the metal pins. In this case, one of the modes will not turn on. You will need to replace the switch. This should be done in the event of a breakdown of the landing tabs.

If the rubber ring is worn, a slight leakage of grease will occur. Will have to replace it.

It happens that the beak breaks at the latch, with which it is attached to the troughs of the gearbox. The tabs of the lock may be damaged. To avoid all of the above damage, you must carefully handle the tool.

Video: Makita 2450 Rotary Hammer Gear Assembly


Gear housing

To remove the housing from the gearbox, raise the tool barrel up. The punch should be pressed to the workbench, while pulling the shell up. In this position, all the details remain in place.

Makita 2450 Rotary Hammer Gear Assembly

After their revision, inspection and replacement, the gear housing is replaced. All its elements must be located in its original form. Necessary elements need to be greased.

During assembly, the gearbox housing must be cleaned with kerosene or gasoline. Next, the shell is put on to its original place. The mode switch should not be in it.

Malfunctions in the gear housing

The case of the HR 2450 model is characterized by high strength, breakdowns in this unit are quite rare. But it happens that certain troubles happen here too. If the case got along with a needle bearing, then its seat is very worn out. When this part becomes extremely loose, the housing should be replaced.

Sometimes the seat of the intermediate shaft is broken. Repair is supposed to be similar to the first case.

The gear housing flange has an oil scraper ring. If it was damaged by construction dust (it happens extremely rarely) or careless actions of a repairman, it is changed together with the body.

The same procedure is performed in case of failure of the holes of the mode switch. The listed types of breakdowns are typical for fake specimens.

Consumer Reviews

Opinions were divided among users about the tool. Among the shortcomings, overheating and leakage of the punch lubricant are noted "Makita 2450". The reviews also make it clear that repairs are carried out by a service center for a long and expensive time. However, eliminating the cause of the malfunction yourself, you can expect normal operation of the tool. Particularly often, malfunctions occur in punchers that have been released in recent years. But earlier products are known as the highest quality. This is due to the emergence of many low-quality fakes that are not made using original technology.

It is noted that this is one of the most inexpensive rotary hammers. It is lightweight but powerful. When you purchase the original and the normal handling of the user during operation, the equipment will work for a long time and productively.

Having familiarized with the characteristics, assembling and repair schemes of the punch "Makita 2450", you can extend the life of this tool. By performing maintenance and replacement of parts yourself, the user will significantly save his money. When buying, you need to pay attention to the characteristic differences of the original tool. It will last longer than fakes.

Today, developers offer buyers hundreds of different apartments and houses. Often, residents want to slightly change their parameters, making housing more convenient and comfortable. Makita punchers will allow to carry out repair work efficiently and quickly. Factory parts and good build quality will extend the life and help to avoid failures during the restoration process. The article will give an idea of ​​the main advantages of the products of this manufacturer.

Makita rotary hammer device

Makita 2450 Rotary Hammer Gear Assembly

Among users, the Makita rotary hammer has established itself as the tool with the greatest functionality. It is durable and does not require special skills for use, is lightweight and comfortable while working.

The design provides a special protective system designed to limit the spread of dust. With timely cleaning, the tool will work efficiently throughout its entire service life.

Makita is widely used in people who prefer to do repairs on their own. The tool is simple to operate, the financial maintenance costs are minimal, inexpensive.

The manufacturer presents the following specifications:

  • Total weight. 2.04 kg
  • SDS system allows you to mount drills
  • You can hammer and drill
  • The system has three modes of operation
  • The largest number of beats per minute. 4500
  • Translational Strength. 2.7 Joules
  • The power supply network is 780 watts.

Why is a Makita puncher undesirable to hammer?

Often the equipment fails, and the drill flies out of the punch. This happens for various reasons. Many users of Makita rotary hammers are faced with the fact that their device does not hit, but drills at the same time. You can fix the breakdown yourself. The most common causes of malfunctions are presented below:

  • Countershaft wear
  • Deformation of clamping units
  • Damage to the connecting rod system
  • Lack of lubrication for proper operation
  • Damage to shock components

Makita rotary hammer: DIY repair

Diagnostic and troubleshooting technology are identical to other devices. To begin with, you should disassemble the tool by removing the case, and then remove obsolete grease and dirt.

Nodes that have stopped working are recommended to be replaced. After that, all the constituent elements of the mechanism are set to their original position.

Makita 2450 Rotary Hammer Gear Assembly

For correct operation, it is recommended that you carefully examine each repair point. To restore the functionality of the cartridge 2010, the mode switch and the housing, the following steps should be performed:

  • Remove cartridge
  • Remove switch
  • Repair defects in the inside of the case
  • Lubricate and replace worn parts.

How to disassemble a puncher and gearbox?

When disassembling the gearbox, it is recommended to adhere to the following instructions:

  • Install the hammer drill on a hard surface by lifting its barrel up
  • Pull the shell with forward movements, pressing the tool to the table. This position prevents accidental displacement of the constituent elements.

Makita rotary hammer assembly

After the repair is completed, all the removed parts should be returned to their original position. It is recommended that a fresh coat of grease be applied to all necessary parts.

Before assembling, the body is cleaned with kerosene or gasoline. The peeled shell is returned to the place. The mode switch must not be in it.

Circuit diagram Makita HR 2450

Makita 2450 Rotary Hammer Gear Assembly

The Makita-2450 rotary hammer system consists of many complementary components and a list of spare parts. Among the most significant elements, the features of which should be taken into account during repair work, the following stand out:

  • Ring locking device. It is designed to hold the spherical element fixing the drill. The washer and spring guide it
  • Snap ring It is necessary for the correct removal of the cartridge cover
  • Four screws connect the gearbox and motor, eliminating vibration. The circuit has a large number of rubber components. Often they cause a malfunction.

Descriptions of the mentioned nodes will be enough for a quality repair.

Conclusion

Makita rotary hammers by right are one of the best in the modern market. The 2470 is a bit improved, but that doesn’t make the device durable. Timely repairs will maximize the period of correct operation. This article helps to understand the features of the work of the main nodes. To eliminate the most common types of malfunctions, these materials are enough.

Makita 2450 Rotary Hammer Gear Assembly

Everyone who has a tool bought 3-5 years ago should understand the steps involved in disassembling a Makita punch. Frequently used equipment breaks down. It is difficult for a home master to do without it. With the help of a puncher, you can start minor repairs and even construction, for example, to equip an extension to the main part of the house.

If the owner of a Makita punch knows how to disassemble and assemble the tool, he will be able to replace the worn parts, lubricate them with grease and avoid further equipment malfunctions.

The uniqueness of the Makita interior design

The design provides a protective mechanism that limits the spread of dust during repair work. In order for the tool to continue to work without loss of quality, there is no need to constantly clean the Start button and other levers, parts from debris.

But the main thing that allows Makita to each owner is to feel like a real man, the owner of his home. The financial costs of servicing the device are also pleasantly surprising. The cost of a new product is small.

The unique SDS system, declared by the manufacturer, allows you to fasten the drill with the Makita apparatus. In addition, 3 functional formats are built into the system, you can also hollow walls or drill holes. The largest amount of work is 4,500 beats per minute. Power from the network is 700 watts.

Why hollowing is better to limit

Despite the fact that the instructions for the use of a Makita puncher indicate the characteristics of hollowing the surface, you should not buy a tool for the constant execution of this work. Technique may fail. The drill will fly out of equipment. Trying to bring the device to life by persistently turning on the drilling mode when it breaks is a big mistake. It is better to understand the cause of the malfunction.

The list of reasons for the breakdown of the Makita rotary hammer looks like this:

  • the intermediate shaft is worn;
  • deformation of clamping format nodes occurred;
  • the connecting rod system is out of order;
  • there is not enough lubrication for the correct functionality;
  • shock parts are broken.

Use a tester to identify a defect. Connect it to the tool plug and press the switch. If resistance occurs, the power circuit is functioning correctly. Decide on the remaining possible breakdowns, armed with screwdrivers, wrenches, a hammer, a wooden extension.

How to repair Makita do it yourself

Makita 2450 Rotary Hammer Gear Assembly

If you have never encountered disassembling a Makita punch at all, it will be difficult to do it yourself by watching the video instructions of the masters. The first step in disassembling is to remove the chassis base. Then, while repairing the equipment, obsolete grease should be removed and dirt and debris removed from the parts. If the functional units are faulty, replace the old with new ones. Then install the components back into the structure.

To repair a cartridge 2010, a mode switch or to correct defects in the housing, perform the following set of manipulations:

  1. Remove the cartridge.
  2. Remove the switch.
  3. Repair any defective signs seen on the inside of the case.
  4. Gently and evenly spread the lubricant over the surface.
  5. Replace defective parts.

How to disassemble a gearbox in a Makita puncher

Disassemble the Makita tool gearbox following the step-by-step guide:

  1. Fix the equipment on a hard surface by lifting the barrel up.
  2. Gradually, without jerking, remove the casing by pressing the equipment to the countertop. This approach will help to avoid accidental movement of parts.

The process of disassembling the Makita punch is clearly shown in the video.

How to assemble a tool

When the repair work is completed, and you are sure that you managed to cope with the malfunction, it’s time to assemble the parts into a whole, working mechanism.

  1. Before assembling, apply fresh grease to equipment components.
  2. Dampen a cotton swab with a little kerosene and wipe the case. You can use gasoline.
  3. Next, the body is put in its original place. https://www.youtube.com/watch?v=y8V0aag3Gb8

Makita rotary hammer diagram

Unassembled equipment is assembled according to the scheme presented in the instructions for use of the device. The scheme helps not to get confused in complementary nodes and spare parts. Elements that are considered basic are included in this list:

  1. Locking device of ring type. Holds the ball component securing the drill. The integrated washer and spring mechanism ensure the correct direction of the drill.
  2. Stopper ring. Allows you to remove the cartridge cover without damage to the parts.
  3. Screws connecting the gearbox to the motor, excluding vibration. There are rubber parts in the circuit. If they fail, the pads are replaced with new ones.

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How to Disassemble a Makita Hr2450 Hammer Video

06/29/2016 07:02 2016-06-29T04: 02: 38.000Z

Description:

I got to my makita HR 2450 puncher, which lost a hit at the peak. There is an internal blow, but it is not transmitted to the peak.
In this video you will see how to disassemble and assemble the makita HR 2450 hammer drill
How to remove the makita HR 2450 punch mode switch. 0:33
How to remove the hammer drill. 1:16
How to understand the puncher gear. 2:05
How to assemble a gearbox. 19:15

Home »Makita 2450 Disassembly Videos

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Even very reliable Makita rotary hammers break down over time.
No matter what kind of damage is fixed, you just need to have straight arms and assertiveness.
Apart from electronic defects, rotary hammers are also subject to mechanical damage.

The work of rock drills with hard materials in a dusty environment reduces the life of the machine and requires the intervention of the user during the repair.

At least some repair of the tool begins with determining the nature of the malfunction and disassembly.

A user who owns the original locksmithing skills and is familiar with electrical safety requirements can repair a Makita 2450 and 2470 rotary hammer.

Here, the mechanical part of the Makita punch, the main malfunctions and methods for eliminating them are considered.

Dismantling the mechanical part of the Makita 2470 rotary hammer

To get to the mechanical part of the punch, you need to remove or disassemble the cartridge.

Dismantling the quick release chuck
Place the puncher on the back of the cabinet on the surface of a table covered with a clean cloth or paper.

Dismantling the Makita HR 2450 rotary hammer

Using tweezers or a screwdriver, remove the rubber tip 35, item 1.

Carefully release the annular spring, pos. 4, the clutch cover, pos. 3, the iron ring, pos. 4. You will reach the iron ball with a diameter of 7 mm, pos.20.

Now you can remove the case of the mechanical part
It is dark in color.
Using a screwdriver, unscrew the four screws at the end of the case.

Holding the dark case with your right hand, press with a huge finger on the shaft end from which the cartridge was disassembled. The plastic casing is simply removable.

Next, remove the gearbox shaft.

To disconnect the mechanical part from the electronic part, you need to pull out the electric brushes earlier.
Remember! At the bottom of the case, the rotor is held by electronic brushes, which must be pulled out without fail.

After checking that the electric brushes are disconnected from the lamellas of the rotor, use a screwdriver to pry the iron case of the punch at the border of the greenish plastic case.

Now we are running over to disconnecting the rotor from the mechanical part of the perforator

pa The rotor is held in the mechanical part through the use of helical gears of the gearbox.
If you take the rotor case in one hand, the mechanical part in the other case and pull it in different directions, swinging, you will separate these two nodes.

You get such a knot in an old grease.

Next, unscrew the two M4 × 12 bolts, pos. 43, art. 266273-7 with an internal hexagon head if there is a hexagon.
Take out the shaft with the pinion gear 10 pos. 80, art.226399-7.
from the inner case pos. 49, art. 153687-8.

Clean parts from old grease.

You get such a mountain of unsullied details.

And now carefully look through the details, immediately discard the rubber rings, picking up new ones.
Replace defective parts with new ones.

Common mechanical problems with Makita rotary hammers include:

  • destruction of the quick-release cartridge;
  • bearing breakdown;
  • breakdown of the shock mechanism;
  • punch barrel wear;
  • wear of rubber strikers and striker;
  • gear breakage.

Repair of the perforator cartridge is done to change the boot and the rubber ring, in addition to a conical spring and an iron ball, which provides clamping of the working tool (drill). This question shows what is a working tool? Specifically, a drill is poorly held in a cartridge.

The main reason is the wear of the iron ball 7.0 pos.20, art. 216022-2. Ball wear occurs from contamination of the barrel of the cartridge due to ingress of dust and dirt.

The type and arrangement of the Makita rock drill punch cartridge is shown in the photo below.

It is not difficult to repair the makita 2450 rotary hammer cartridge at home. The cartridge needs to be disassembled, released from an old grease, discard rubber parts, replace defective ones.

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complex malfunctions require knowledge of the mechanical part of the Makita 2450 rock drill.

Having determined the nature of the malfunction of the Makita rotary hammer, proceed to disassemble the mechanical part called the gearbox.

Disassemble the mechanical part according to the attached video.
Release it from an old greasing.
Closely examine what remains to do to our client parts, their integrity, level of wear. What remains to do to our client rubber products at any sort of disassembly require a change.

Consider the repair of the hole punch. Let’s analyze the mechanism completely.
Video disassembly, lubrication and assembly of the Makita rotary hammer

Video: Makita 2450 rotary hammer bulkhead

Remember! At the bottom of the case, the rotor is held by electronic brushes, which must be pulled out without fail.

Next, from the pulled out mechanism, the rotor must be disconnected. The rotor is disconnected from the mechanism simply by pulling out, as it is held due to friction of 2 helical gears.

Such a dirty knot came out here.

Now you need to separate the shaft of the percussion mechanism.

In most cases, rubber rings, striker poses wear out. 24, compressor spring pos. 18. and cylinder parts.

Ah, so the barrel parts wear out and collapse if the tool is used incorrectly.

Consider the best complex malfunction. breakdown of the shock mechanism.
Corresponding signs of failure of the impact mechanism are the absence of impact and the nasty noise of the working hammer operating in the “Impact” mode.

Video: Minute of vandalism) (21) Makita HR 2450 rotary hammer Powerful kickback in impact mode

Such a malfunction is characteristic of perforators, which during use were very pressed against the work surface.
Having disassembled the gearbox, we remove fragments and pieces of third-party objects. We find the defective part and clean the rest of the old grease.

Often the firing pin pos.24 is destroyed, art. 324396-8, which is part of the trunk.

iron ring pos. 27. art. 324216-6.

Discard warped parts, replace with new ones, cover with a narrow layer of grease. Parts are ready for assembly. However, about this decision in a subsequent article.

How to repair a Makita HR 2450 hammer drill if the shock mode is lost

The Makita power tool has long established itself as a professional, reliable and ordinary in maintenance. He also has good maintainability and relatively low price.

Of all the ruler ranges, I would like to slow down on the Makita HR 2450. The tool is very useful in operation, has three operating modes and can withstand very long loads. The puncher worked reliably for more than 6 years without breakage at the creator of these lines. over, he was used working in saturated loads.

However, as we know, nothing endless does not exist. And reliable technology breaks down. Somehow, in the midst of work, he did not peck. Working in rotation mode, the machine worked, and the blow suddenly disappeared.

The gearbox was disassembled and the cause of the breakdown was identified. A sleeve was broken in the barrel body when the striker (striker) specifically does the impact work.

For this reason, the drummer stuck in the fragments of a collapsed sleeve.

The service recommended completely changing the trunk. It turned out that the sleeve is pressed into the barrel at the factory and is not supplied separately. I had to take a completely new barrel.

Here, the creator will tell you how to bring the puncher into working condition after this, in general, easy breakdown. If of course you have the ability to repair power tools and the desire not to pay someone your hard earned money, then we take the tool and begin disassembling the machine.

Two simple flat-head screwdrivers and one Phillips screwdriver will come in handy. One of the flat screwdrivers can be narrow and narrow, less than 4 mm wide. A wire hook is also useful for removing the snap ring. It is made of a bicycle spoke, the main thing is that the wire is rigid and just does not bend. You will also need a rubber mallet or a wooden mallet.

Disassembly of the punch should begin with the removal of the protective rubber cap. anther. He just takes off, just grab it with your fingers and pull it off the barrel.

Then, having pressed on a plastic cover and having squeezed a spring of a lock of the SDS mechanism, we remove a lock ring with a screwdriver.

Using a screwdriver, remove the stopper

The lid is removed from the barrel, and after it, again compressing the spring, we pull out the retainer ball together with the spring and the figured washer.

After that, the mode switch is disassembled. Under the cover holding the reddish button-lock, of course, a special groove for the screwdriver. After inserting a screwdriver into the myth and prying off the lid a little at first from the textbook of the edge, and then from the second, carefully remove it. It is not recommended to make significant efforts, the lid is still plastic and may break. The reddish button together with the spring is removed from the switch housing, and it switches to the left according to the full program, a little further than the drilling mode. It is from this position that he is removed from the gearbox. For this operation, the switch needs to be picked up a little with thin screwdrivers on both sides and removed together with the rubber O-ring.

Remove the punch mode switch

Now the gearbox is being removed. Using a Phillips screwdriver, unscrew the four bolts connecting the box to the stator housing. Then, holding it with your hand, you need to hit a little with a mallet on the end of the barrel so that the box comes off the gearbox.

Remove the gearbox

Having removed the box, we take out the barrel from the gearbox. It is removed simply.

We take the barrel out of the gearbox

With a rag, you need to remove the old grease, and wash the barrel with gasoline using another kerosene and wipe it dry.

What is needed, as mentioned above, it was necessary to completely change the entire trunk. But this item acquired in a car service turned out to be “a goal like a falcon”. In other words, nothing happened here and we had to do what our client had to do to rearrange the parts from the old barrel to the latest "blank".

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The most difficult operation was extracting the drummer from the barrel. There are special holes in the barrel body through which a snap ring is visible. This ring holds the striker in the saddle with rings and rubber dampers. Having inserted a narrow screwdriver into the hole, we bend the ring a little. We do this at first a positive point in that, and then on the other. The stop must come out of the groove.

Using 2 screwdrivers, squeeze the stopper

Then, from the inside, we pull out the stopper from the wire with a homemade hook into the light of God.

Using a wire hook, pull out the stopper from the inside

Next, we remove the striker with washers and rubber rings. It is necessary for assembly to clarify or sketch the placement of all rings and washers. If something goes wrong, photos and pictures from the article will help.

Now you need to remove the gear from the shaft. Having pressed on a washer and having squeezed a spring, with a narrow screw-driver it is necessary to take a lock ring from a flute. After removing it, remove the washer, spring and gear from the barrel.

Video: How to Disassemble a Makita Hr2450 Hammer Video


The gear wheel is put on a new barrel and engages with splines. Following this address is a spring with a washer and a stopper. Insert the retaining ring and lock the mechanism in the working position.

For this purpose, you should take the barrel in both hands and, resting it on your hands, use your fingers to squeeze the spring with force, immediately pushing the washer and stopper down. You need to compress until the stopper engages in the groove.

Then, a striker with washers and rubber rings is installed inside the barrel in the order in which he understood. However, before this, it is necessary to monitor the condition of the drummer, his appearance.

If the striker has potholes and shells after a long work in another way, since it was scratched on a broken sleeve, then it should not be sanded.

For this purpose, it is clamped into the drill chuck and processed with a fine sandpaper. If the bulges are very huge, then the drummer will be easier to replace.

It is necessary to lubricate the striker with special grease before installation and in the near future use lubricant during operation. When inserting a drill into the hammer, you need to apply a little lubricant to its shank. This extends the life of the machine.

Having installed the striker mechanism in the barrel, we fasten it with the circlip. Using a screwdriver, we try to move the drummer from both sides inside the barrel. He should just walk in the canal and not even jam.

The assembled barrel is installed in the gear housing. Putting it on the cylinder with a piston, we engage it with the pinion gear and insert it into the housing. Our customer remains the details should be perfectly lubricated during assembly.

Install the barrel in the gearbox

Then we install the gearbox, having previously greased the needle bearing. With 4 bolts we draw the box to the stator housing and set the operating mode switch to the area. For this purpose, set it to a position slightly to the left of the drilling mode.
We insert the reddish latch button with the spring and move the switch to the drilling mode. We click on the plastic cover and check the operation of the switch.

Set the mode switch to the area

We snap the cover of the punch mode switch

Then, ending with a chord, the SDS mechanism is assembled. Having installed the spring of the mechanism, we put on a curly washer and insert the ball. After completing the plastic cover, compress the mechanism spring and insert the snap ring. Putting on a rubber boot is no longer difficult.

Having pressed a spring with a washer, we establish a ball a clamp

Install the SDS engine

We try a hammer drill under load. During operation of the machine, there is no external noise in the gearbox; the operating mode switch should simply move without jamming. That, everything should work, as before the breakdown.

The creator of this article hopes that it will help honored readers figure out how to repair a punch. It doesn’t matter what kind of damage it may turn out to be easy if you find its cause. And then everything depends on your skill and diligence.

In the construction industry, the use of Makita rotary hammers is very important. The value of this technique can hardly be overestimated; it is indispensable when working with concrete, stone as it is also called brick. Especially strong materials remain for our client to give in to the pressure of this universal tool. In everyday life, Makita punchers are used for drilling holes in concrete and stone, for the production of gaps, recesses, cable channels in the walls and in the floor.

The Makita rotary hammer has dual motor protective insulation. Among the indispensable parts of the structure there is an uncoupling clutch that prevents jerking when the drill is jammed, and electric speed control. Corporate identity indicator. the instrument is equipped with a comfortable suitcase for storing the instrument.

Most of the models are equipped with a dust removal system and are available with a soft rubber pad on the handle. The assortment includes Makita rotary hammers, both with a direct and vertical arrangement of the motor.

It can do 3 functions: drilling, drilling with impact, chiselling.

Depending on the number of functions performed, they are divided into three groups:

  • single-mode. do drilling with a blow, for example, Makita HR 2010.
  • dual-mode. drilling and drilling with impact, or drilling with impact and chiselling. The most popular hammer drill is. Makita HR 5001 C can drill with a blow or hammer.
  • three-mode. switch to any mode of operation. For example, Makita HR 2450.
  • With SDS Plus, single, dual and tri-mode rotary hammers weighing up to 5 kg are available.
    Feature: power up to 850 W, impact force up to 5, 3 J, drilling diameter in concrete 18-30 mm.
  • With the SDS max cartridge two- and three-mode models in weight from 5, 9 kg are offered.
    Trait: power 1100-1500W, impact force 8, 3-17, 5J, the largest drill diameter 40-50mm, crowns 105-160mm.
    Advantages: the highest power and low level of vibration.

Shop "Makita. "Is a dealer of a Japanese company and offers a wide range of Makita rotary hammers with a manufacturer’s warranty and delivery. Professional managers who have completed training courses will help to choose the best model!

We want to offer Makita punchers throughout Russia: Moscow, St. Petersburg, Yekaterinburg, Chelyabinsk, Nizhny Novgorod and other towns with delivery and warranty, call! You can find out detailed information about the methods and prices of delivery from our managers.

Due to the ingress of dust, dirt and moisture, the internal lubricant becomes hard over time and does not fulfill its purpose. The hammer starts to work with extraneous noise. Before repairing the punch, be sure to read the attached instructions for disassembling, lubricating, and assembling the components of the Makita 2450, 2470 punch. The layout of the Makita 2450 and 2470 punch will help to disassemble the failed parts correctly and find defective parts. And also we will tell how to disassemble the Makita 2450 puncher.

Disassembly of the Makita 2470 punch starts with the removal of the mode switch knob.

Punch disassembly procedure

Place the hammer drill on a clean surface.

When disassembling the mechanical part of a Makita 2450 or Makita 2470 rotary hammer, you must always remove the mode selector knob.

At the beginning of operation, the handle is set to the “Impact” mode (extreme right position clockwise).

How to Disassemble a Makita Hr2450 Hammer Video

On the handle, using a screwdriver, poke and release the latch.

How to Disassemble a Makita Hr2450 Hammer Video

After removing the latch, the handle is moved to the leftmost position, in the "Drilling" mode.

How to Disassemble a Makita Hr2450 Hammer Video

The handle clamped with fingers is removed from the grooves of the housing.

Video instruction for disassembling the Makita 2450 punch mode selector knob

How to set the mode knob

To install the mode switch in the case, you need to perform some actions:
insert the switch into the “drilling” position in the seat slot until it clicks;
turn the switch counterclockwise to the “strike” position;
move the switch with a click counterclockwise to the “drilling” position;
insert the spring and the red button;
insert the cover on top until it locks in place.
The mode switch is assembled.

How to Disassemble a Makita Hr2450 Hammer Video

At the second stage, you should disassemble the quick-detachable cartridge and repair the punch cartridge with your own hands. By the way, the cartridge needs to be disassembled only on models of the Makita 2470. The cartridge device is quite simple, and any person with a little knowledge of locksmithing skills can cope with its repair.

Makita rotary hammer disassembly procedure

Repair of the perforator cartridge begins with the installation of the perforator vertically on the rear housing cover. The hrMakita hammer drill circuit will help you properly disassemble.
Is a Makita 2470 rotary hammer cartridge replacement needed? The answer can be obtained only after a complete disassembly of the cartridge with your own hands.
Using a screwdriver or puller, the boot is removed, the cartridge is released from the retaining ring, clutch cover, metal ring 20 pos. 4. Next, you need to carefully get the ball pos.20, remove the guide washer pos.5 and the conical spring pos.6 that supports it. The cartridge is disassembled.

How to Disassemble a Makita Hr2450 Hammer Video

The diagram below shows the design of the perforator cartridge.

How to Disassemble a Makita Hr2450 Hammer Video

The main malfunctions of the makita 2450 punch, causing defects in the operation of the chuck, are:

  • wear of a protective rubber boot pos.1;
  • relaxation of the retaining ring pos. 2 or its partial wear;
  • ball wear pos.20;
  • loss of elasticity of a conical spring pos.6 or its tension.

Repairing a perforator cartridge is not a complicated procedure and is usually easy to carry out by anyone who can hold a screwdriver in their hands.

If replacing a rubber boot, retaining ring, conical spring is not difficult, then replacing a new ball requires attention. The new ball must have a diameter of 7 mm ± 1 μm.
As lubricants, it is recommended to use a special grease developed for the Makita rotary hammer.
The grease has an index of Makita P-08361, Makita 183477-5 SDS-PLUS 30 g for the gearbox. Makarov 196804-7 grease is recommended for drill shanks.

When assembling the cartridge, install the conical spring with the narrow side facing the punch.
Do not forget, do-it-yourself cartridge repair requires careful attention from the collector.

Assembly procedure for quick release chuck

Assembly is carried out on a clean surface. Parts are pre-washed, dried and greased with a thin layer of recommended grease.

The gearbox shaft is lubricated with Makita 183477-5 SDS-PLUS grease. On the shaft in a certain sequence, all incoming parts of the cartridge are collected.

How to Disassemble a Makita Hr2450 Hammer Video

After installing the conical spring, pos.6, put on the guide washer pos.5 and fix it with the ball pos.20, inserting it into the groove of the gearbox shaft.

How to Disassemble a Makita Hr2450 Hammer Video

It remains to put on the ring pos. 4, the casing of the coupling pos. 3, fix the parts with the locking ring pos. 2. At the last stage, insert the protective tip pos. 1 into the end face of the cartridge
The Makita 2450 rotary hammer cartridge repair is now complete. It remains to check its quality by inserting a drill into the cartridge. With proper assembly, the cartridge holds the drill from spontaneous loss.
Cartridge assembled.

Disassemble the gearbox

To get to the mechanical part, you will need to remove the plastic case.

The procedure for dismantling the mechanical part of the Makita rotary hammer
The protective black plastic case is first removed. The case is removed after you unscrew the four screws securing the case from the end.
By pushing on the shaft end you squeeze the gearbox out of the housing.

After removing the housing, it is necessary to separate the rotor from the gearbox. A reducer is a general mechanical part.
The rotor is separated from the mechanical part (gear) simply.
With your right hand you need to hold the gearbox, hold the rotor with your left.
Swinging, pull both sides in opposite directions. The rotor is held in the gearbox due to the friction of helical gears.
The main malfunctions of the Makita rotary hammer occur in the mechanical part of the tool.

The most characteristic malfunction for the mechanical part, the failure of the shock mechanism.

Dismantling the hammer
The shock mechanism is assembled on the inner case and consists of a gear shaft and an intermediate shaft.
Rotational motion is transmitted through helical gears to the countershaft.

How to Disassemble a Makita Hr2450 Hammer Video

The gear shaft is a hollow barrel in which the cylinder moves freely.

How to Disassemble a Makita Hr2450 Hammer Video

A small spur gear mounted on an intermediate shaft transmits rotation to a large spur gear of the gearbox shaft in which the percussion mechanism is mounted.
And the translational movements on the gearbox shaft of the shock mechanism are simultaneously transmitted due to the transfer from the rolling bearing of the intermediate shaft to the cylinder moving in the gearbox barrel.

We proceed to disassemble the intermediate shaft.

Dismantling the countershaft

How to Disassemble a Makita Hr2450 Hammer Video

On the shaft pos. 40, a helical gear pos. 42 is mounted, on which rotation is transmitted from the rotor gear, a rolling bearing 608zz pos. 41, which transmits translational motion to the joint pos. 34 of the piston pos. 32.
On the other side of the shaft, a clutch pos.39, spur gear 10 pos.80, compression spring pos.38, snap ring S-7 pos.37, bearing 606zz pos.36
Particular attention should be paid to the condition of the rolling bearings.
The punch has imported bearings. Allowed the installation of domestic bearings.
Bearing 606zz can be replaced with 80016, bearing 609zz is changed to 80019.

We proceed to disassemble the shaft of the shock mechanic

Dismantling the shock shaft

How to Disassemble a Makita Hr2450 Hammer Video

Dismantling the barrel of a Makita 2470 rotary hammer is a simple process using the Makita rotary hammer design.
The shaft is a barrel pos.21, in which the shock mechanism is assembled.
A gear pos.19 is attached to the barrel, which is pressed by the spring pos.18, through the washer pos.17 and fixed by the locking ring pos.16.

How to Disassemble a Makita Hr2450 Hammer Video

The cylinder pos. 32 moves in the barrel, acting on the striker pos24. On the reverse side of the striker is fixed a metal ring pos. 27, transmitting the blow to the drill.
And when do you need to replace the barrel of a punch?

Most often, a metal ring fails.

How to Disassemble a Makita Hr2450 Hammer Video

Striker

How to Disassemble a Makita Hr2450 Hammer Video

Drum cylinder

How to Disassemble a Makita Hr2450 Hammer Video

With the disassembly, we figured it out.
We change the parts to serviceable and are preparing to assemble. Learn more about grease and punch assembly.

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What are the batteries in a Makita screwdriver

For more than 100 years, the Japanese brand Makita has been pleasing its customers with constantly improving high-quality screwdrivers. The manufacturer’s assortment includes both battery and network models. Which of them and why it is worth giving preference, as well as the intricacies of the work of screwdrivers with a lithium battery, will be described in this article.

Almost any screwdriver of the Japanese manufacturer can completely replace a set of tools. It is great for working with a wide variety of classic mounts. Such a screwdriver is convenient and functional in operation.

What are the batteries in a Makita screwdriver

The power of 18 volts and a wear-resistant gearbox allow you to mount even large-diameter self-tapping screws, without fear of poor-quality work or quick breakdown of the device. The power control button of the screwdriver is located on the rubberized handle of the device, which makes its use as convenient and safe as possible.

What are the batteries in a Makita screwdriver
What are the batteries in a Makita screwdriver

Additional functions, such as changing operating speeds and backlighting, allow you to comfortably perform the necessary actions using this tool quickly and efficiently.

If you purchase the latest developments of the Makita model, then, if necessary, they can also be used as a drill.

True, in this case it is better to choose the screwdriver that is sold together with autonomous charging, and does not work directly only from the network connection.

Japanese-made screwdriver motor has excellent wear resistance, does not overheat, and some models have a shutdown function when overheating. Battery change screwdrivers cannot be operated if the charger is plugged in. This can lead to overheating and premature failure of the unit.

What are the batteries in a Makita screwdriver
What are the batteries in a Makita screwdriver

In general, all Makita screwdrivers are characterized

  • high functionality
  • affordable price
  • continuous uptime
  • additional warranty from the manufacturer
  • ease of use

What are the batteries in a Makita screwdriver

It is difficult to find today a manufacturer of such devices with a similar combination of price and quality.

Like any other tool, screwdrivers of Japanese manufacturers have their pros and cons. The main advantages are quite a lot.

  • Universality of use
  • Virtually fully autonomous
  • The cost of spare parts is lower than the price of products of competing brands
  • Usability
  • Light weight due to which the use of a screwdriver does not cause discomfort and a feeling of tired hands
  • Ergonomics
  • Existence of a special button for smooth descent and sharp braking of work
  • Stylish and modern design
  • Affordable price
  • The warranty period of the original tool is 3 years.

There are also minor flaws, which, however, can be quickly eliminated if necessary.

  • When performing a large amount of work, the engine can quickly start. In this case, it is enough to purchase a special reinforced gearbox, and this minus will be eliminated.
  • Weak screwdriver power or low backlight level. It is difficult to eliminate such a flaw on your own, but it can be avoided if you correctly purchase a tool to perform specific tasks.

The advantages of such tools are much greater than the disadvantages. Therefore, it is not surprising that every year the number of fans of Makita brand products increases.

The manufacturer today offers customers a wide range of these tools. All of them can be divided into several large groups:

  • Mains or battery. They differ from each other in the way they work: either from a direct connection to the mains (electric) or from a replaceable battery (stand-alone). When performing a small amount of work, it is better to purchase the second option. At the same time, electric wire tools are more suitable for private and long-term use.
  • Tape device greatly facilitates a large amount of work and reduces the overall time it takes. Self-tapping screws are inserted sequentially into a special moving tape, which, when the screwdriver is turned on, advance independently.
  • Cassette tool. The usual standard, which is more suitable for domestic use. It does not have such a function as the previous model, each self-tapping screw must be installed independently.
  • Professional and household units. They differ from each other in power, the presence of additional equipment, speed. At the same time, both of these types can be both complete with a lamp, and without it.
  • Brushless screwdriver has a special brushless motor. It is in such tools that you can quickly and in a wide range change the intensity and speed of the unit itself. New generation household electric screwdrivers are virtually all brushless.
  • Impulse and shock tools differ from each other by the movement of the drill. In the first case it is intermittent and more intense, in the second it is smooth and sliding.
  • Classic and corner electric screwdriver. In the first case, the model is more compact. It has a long handle and a short upper working part. This is what makes such a tool as convenient to use in hard-to-reach places as possible.
  • 12 volts, 18 volts, 220 volts. this marking indicates the battery power and the voltage intensity of the network to charge it. The higher this indicator is, the more powerful and durable the screwdriver will be.

Video: What are the batteries in a Makita screwdriver


Despite the fairly wide range, there are some screwdrivers that are especially popular with buyers.

Makita DDF343SHE. The best screwdriver for professionals. The wireless model has two removable batteries, which allows it to be used for a long time without interruption in recharging.

FS4000. Another model that is popular with professional builders and carpenters. Has a high speed, convenient power switch, capacious battery. It fits comfortably in the hand and performs all its functions efficiently. The presence of additional illumination makes it possible to use it in low light conditions.

Model 6807. is a universal tool. A cordless screwdriver ideal for both professionals and home users. Powerful, not overheating during prolonged use, ergonomic and easy to use. It’s also important that the price of such a tool is available to everyone.

FS4300. A network model of an electric screwdriver, which is indispensable for home use. The device itself has a small weight, fits comfortably in the hand, does not bring discomfort during long-term operation, quickly allows you to perform the necessary operations.

It is one of the most popular household models of this device. It is characterized by low noise, high battery, good power and versatility.

It has a modern stylish design, it is considered one of the most budget, but modern models of Makita screwdrivers.

  • You should not choose a tool, focusing on its price. The first thing you should pay attention to is technical specifications.
  • If a screwdriver will be used almost daily and to perform a large number of work, then professional models should be bought. If you plan to use it from case to case, then a simple tool for the average person is quite suitable.
  • Particular attention should be paid to the rotation speed. the higher it is, the more powerful the device. For domestic needs, you can buy screwdrivers 400-500 rpm, and for professionals, this figure should fluctuate in the range from 1100 to 1300 rpm.
  • Network models are more suitable for home use. They have more weight than a cordless tool and need direct electrical current.
  • It is advisable to give preference to screwdrivers with a keyless chuck, and not with a key. The former are faster and easier to maintain and do not require the use of an additional key.
  • At least for home, at least for professional use, it is better to purchase a tool that has a reverse function. It allows you to unscrew the screw without using additional tools.
  • Convenience of operation. It is necessary to take the device in hand and evaluate the comfort of holding it both in the off and on state. This will subsequently avoid unpleasant sensations when using it.

It will be useful to familiarize yourself with the components located in the case before buying. This is especially important when acquiring a professional screwdriver. The more diverse the contents of the case, the less likely it is that subsequently it will be necessary to buy additional tools again.

Together with each screwdriver, a special insert is implemented, which contains all the basic requirements and recommendations for the proper use of a specific device model. But there are general rules for all screwdrivers of this brand, which must be followed.

  • Work must be in a well-lit place.
  • Children and persons in a state of AL-KO intoxication are not allowed to work.
  • You can not leave the device, regardless of its type and specific model in the rain, snow or bright sun.
  • Before turning on the screwdriver, you must remove all unnecessary tools from it.
  • During operation, you can not put too much pressure on him.
  • When performing adjustment work, as well as before removing the cartridge or any other components, the screwdriver should be turned off and, if necessary, disconnected from the mains.
  • Before and after each use, the health of all parts of the tool and its cleanliness should be checked.
  • Only those chargers specified by the manufacturer should be used for charging.
  • It is strictly forbidden to disassemble and attempt to repair the tool’s charging unit yourself.

Any operating manual for screwdrivers of this Japanese brand without fail contains these basic rules. Their observance is considered extremely important both for the correct and safe operation of the device, and for the safety of the person himself.

The Japanese brand is not the only one in the world who is engaged in the manufacture and sale of screwdrivers of various types and models. A small comparative description with the main competitors will allow you to really compare the pros and cons of each brand and ultimately make the right choice.

  • Bosch. Another world famous manufacturer of screwdrivers. Unlike the Makita brand, the cost of the tool itself, as well as its spare parts, is much higher. In addition, during operation, even with a standard tool, even with a professional one, a strong beating of the cartridge itself is often observed. This creates certain inconvenience during its long-term use and quickly causes hand fatigue. Otherwise, there are no serious complaints about Bosch devices.
  • Metabo. A German manufacturer famous for producing really high-quality tools. Its key difference from the products of the Japanese manufacturer is the higher cost of screwdrivers. There are no complaints about the technical characteristics and the operation of the devices themselves.
  • Dewalt. It is almost an equal competitor to the Japanese manufacturer. Both of them produce high-quality and durable products. The main difference is that parts for Dewalt brand screwdrivers are not only more expensive, they are even harder to find.

All these manufacturers in the tool market have been working for more than a dozen years. During this time, they have earned a good reputation and created a circle of their customers. At the same time, the quality of their screwdrivers and the lineup are very similar. Therefore, it is impossible to single out one brand and say that it is the best.

Screwdrivers are complex tools. That is why the manufacturer does not advise to do a full-fledged repair of devices with their own hands, if it comes to serious damage. If the problems in the work are small, for example, a cartridge jams, then disassembling the instrument with your own hands is quite allowed.

Replacement of components should be carried out only in a de-energized device. To do this, the device is turned off, disconnected from the power supply or the battery is removed and only then proceed with further actions.

In any case, you must first properly disassemble the tool itself:

  • remove the screws securing the device body to each other
  • remove the start button and all its components
  • remove the gear motor from the disassembled housing
  • disconnect these two mechanisms from each other

If it is necessary to change the cartridge in the tool, then first you must determine the method of its attachment to the shaft and then act according to the instructions.

The inscription "1-6 B10" indicates the Morse mount. In this case, all that is needed is to knock out the old cartridge with an ordinary hammer. After that install a new one.

Type marking “1.0–11 M12x1.2” or “2–13 mm ½-20 UNF” means inch thread. In this case, open the cam of the cartridge, insert the short edge of the Allen key into the cams and hit it hard with a hammer. The edges move away, and the cartridge can be unscrewed by hand.

It will be possible to assemble the screwdriver after the new cartridge is installed in place.

If it comes to replacing brushes or gearboxes, it is best to contact a specialized service center. It is very difficult to independently perform such work in a high-quality and safe manner at home, especially without experience.

details about this brand of the tool are described in the video below.

Batteries for Makita screwdrivers

For optimal operation of the power tool, carefully select the batteries. Naturally, a Makita screwdriver is no exception. Therefore, it is important to understand what requirements are there, as well as what to pay attention to. Next, we will analyze all the main nuances of the battery for this equipment.

What are the batteries for Makita screwdrivers

In practice, a wide variety of batteries can be used. Between themselves, they can differ not only in the voltage used, but also in manufacturing technology. In each case, the characteristics will be different.

Typically, the instructions indicate the type of battery, but often a choice of several options is allowed. Therefore, for a start it is worth looking at the technical characteristics of the main varieties.

What are the batteries in a Makita screwdriver

The main advantage of such batteries is the ability to quickly charge. But, at the same time, they may suffer from a “memory effect." In the case of screwdrivers, they are used in models with medium voltage.

Among the batteries there are models with voltage:

During the operation of batteries of this type, it should be remembered that they require a high level of discharge. If you charge them, without waiting for a full discharge, the service life will be significantly reduced. A good option would be to use specialized chargers, which, before charging, completely discharge the nickel-cadmium battery.

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Makita 125 Angle Grinder Variable Speed

Angle grinder, which is popularly called the angle grinder, is a universal tool with which you can perform a list of works: cutting, grinding, cleaning metal, wood, stone and other materials. This tool has found its application in industry. It is ideal for both professional repair work and household chores.

Makita 125 Angle Grinder Variable Speed

Now on the market there are a large number of different models of angle grinders designed for home or professional use. The latest angle grinder with speed control is equipped with special nozzles of any size, characterized by the presence of descent safety locks and additional functions. With all the variety of models and sizes, an angle grinder has a common task, which is to facilitate the person’s workflow as much as possible and save time.

Which angle grinder to choose? Household and professional tools

When buying an angle grinder, you should take into account such indicators as rotation speed, power, the presence of additional functions and disk sizes.

Indispensable in everyday life are angle grinders. This is a conventional angle grinder, which are compact in size and demanding on the operating mode. After 10-15 minutes of operation, the owner of a conventional grinding machine is forced to take a mandatory break to prevent its overheating. The household angle grinder is not designed for daily use. Their technical indicators are much lower than that of professional devices that can be used for a long time without fear of overheating. In addition, professional angle grinders are equipped with brass inserts and a metal housing. This is due to the fact that they have to be used in extreme conditions: laying pipelines, earthwork, etc. For such an environment requires a tool that is as much as possible protected from dust and moisture.

Universal angle grinders

Universal are considered an angle grinder with speed control. These machines are ideal for jobs such as cutting, grinding and polishing any materials.

Makita 125 Angle Grinder Variable Speed

angle grinder with speed control and soft start are mainly used in those cases when it is necessary to polish stone or wooden surfaces. This is due to the structural features of these materials, the processing of which at high speeds is undesirable, as it leads to the destruction of the surface and rapid wear of the nozzles.

The best manufacturers of grinders

Angle grinders are produced by domestic and foreign companies. High results were achieved by the German manufacturer Bosch, Japanese Hitachi and Makita. Mostly they produce models for professional use: an angle grinder with speed control, power exceeding 1200 W, and various disk diameters. Angle grinders make it possible to carry out any kind of complex work. Using special diamond blades, it is possible to cut concrete and stone, to cook walls under wire. The presence of an additional side handle provides control over a powerful power tool during its operation.

Bosch: Model GWS 850 CE

The Bosch angle grinder with speed control and an output of 850 watts is ideal for grinding with diamond cups in natural and artificial stone. This angle grinder is one of the most popular electronic tools in the work of professional stonecutters, who every day are faced with the need to polish in places where granite or marble are cut. This angle grinder is lightweight, which greatly facilitates operation: the master can hold it with one hand.

The Bosch GWS 850 CE angle grinder with speed control is warranted for one year of professional use.

Makita 125 Angle Grinder Variable Speed

You can adjust the grinding speed using six positions. The rotation speed range of grinding nozzles and discs is from 2,800 to 11,000 rpm.

The quality of polishing directly depends on the speed of rotation of the nozzles. The smaller it is, the higher the quality of work. This requirement applies to granite, marble, glass and other surfaces that can be operated with a grinding tool equipped with an adjustment function. To work with marble surfaces, experts recommend a choice of speed at which the grinder produces 2800 revolutions. Wooden surfaces can be treated with special nozzles at the highest speeds. The maximum speed for this angle grinder is 11,000 revolutions.

Video: Makita 125 Angle Grinder Variable Speed


Bosch GWS 850 CE comes with a key, handle and two mounting washers for discs and nozzles.

Nozzles for polishing work

The quality of polishing work depends on the adjustable speed and correctly selected nozzles. For grinding marble and granite surfaces by experienced engravers who work with stone professionally, flexible diamond blades are recommended. For wood, an emery petal circle is suitable. For polishing metal products and surfaces, it is best to use circles containing felt or felt, which is attached to the nozzles with a special Velcro. Felt nozzles are also suitable for polishing glass. But in this case, you need to purchase a special diamond paste. Painted or varnished surfaces must be treated with lamb wool tips.

Makita 125 Angle Grinder Variable Speed

Household Makita GA5030 angle grinder

Makita angle grinder with speed control is considered one of the best models of household angle grinders. Its price is 2500 rubles. The Makita GA5030 has a low weight that does not exceed 1.8 kg, which is an advantage of this tool compared to other similar models in this price category.

Makita 125 Angle Grinder Variable Speed

Professional Angle Grinder Makita 9565Cv

Angle grinder Makita angle grinder 125 mm speed control provides the implementation of any kind of work at speeds from 2800 to 11000 rpm. Makita 9565Cv requires a 125 mm diameter drive and 220 volt power. Power Consumption Angle Grinder. 1400 watts. 125 mm angle grinder with speed control 9565Cv is a professional power tool, the design of which contains:

  • adjustment of rotation speed, which makes it possible to optimize the operating mode. The spindle receives a certain speed necessary for a specific task: cutting, grinding or grinding;
  • power button lock. This is important to ensure safety during operation, especially in cases of unplanned power outages (turning off the light, pulling the plug out of the socket). Thanks to the secondary start-up fuse, the owner of the Makita 9565Cv is protected against arbitrary switching on the angle grinder and does not risk injury;
  • double isolation;
  • speed stabilization system, which, due to changes in disk loads, facilitates the process of working with massive labor-intensive parts;
  • two-position side handle, which ensures reliable holding of the power tool during operation. A convenient version of the handle performs an anti-vibration function.

9565Cv angle grinder is an angle grinder "Makita" 125 with speed control and smooth descent, due to which the power tool is protected from critical overloads when turned on. A soft start protects the angle grinder system and the numerous parts contained in it (disk, winding, engine brushes) from a strong power surge. Turnovers are typed smoothly, the angle grinder does not tremble in the hands.

How to choose the required disk size?

For angle grinders, discs with a diameter of 115 to 230 mm are intended. Working is the part that extends beyond the apparatus. Nozzles tend to wear off during use. Disks with a diameter of 115 mm quickly wear out and are suitable for cutting products with a thickness of not more than 3 cm. over, this diameter is unsuitable for working in hard-to-reach places. For such operations, 180-230 mm discs are better suited.

Metabo WEV 10-125 Quick

This is another angle grinder with speed control. 125 mm is considered the optimum disk size for the Metabo WEV 10-125 Quick. Among all the well-known 125-mm angle grinders, this model is considered the best in terms of power. It features a wide range of adjustment of spindle speeds and a constant speed under the influence of a variable load. This is ensured by built-in electronics, which protects the engine from the overload grinder and produces a smooth start of the system. The angle grinder has an automatic safety clutch and corner brushes that turn off if voltage suddenly drops. This is important for safety during operation of a powerful angle grinder.

Makita 125 Angle Grinder Variable Speed

Hitachi G13SS

Makita 125 Angle Grinder Variable Speed

The ergonomic shape of the model, the presence of a removable handle in its design, which allows it to be installed on either side, the ease of replacing carbon brushes are advantages for Hitachi G13SS that many users have already appreciated.

What to consider when buying?

If you want to purchase an angle grinder, you need to get acquainted with the technical indicators of the model you like. Best of all, if there is a soft start. This will protect the owner of the angle grinder from possible jerks when turning on the power tool and from knocking out fuses. The problem of increasing the load on the system of an angle grinder can occur when the speed is reduced. In such cases, overheating occurs. It is desirable that the angle grinder be equipped with modern sensors that regulate the speed of revolutions during overload and overheating. The more complex the model system, the higher its class and the more expensive it is. At the same time, more and the amount of work that can be done using expensive power tools.

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How to Sharpen a Knife From a Makita Lawn Mower

Despite the fact that the blades of a lawn mower are made of high-quality steel, they need to be sharpened from time to time. Fortunately, this does not require special skills and equipment, and today we will tell you how to sharpen the knife of the lawn mower ourselves, without compromising the quality of the metal.

How to Sharpen a Knife From a Makita Lawn Mower

You can cut off excess grass from the lawn even if the edges of the mower’s knife are obviously dull. However, the shoots will delaminate in the longitudinal direction, turning into a fringe. A few days after mowing, the grass will become stale and will hurt for a few more weeks. The cut should be smooth and neat, then it will drag out in just a few hours and the lawn will always be juicy green. This requires that the knife be sharpened almost perfectly.

How to Sharpen a Knife From a Makita Lawn Mower

Left: grass cut by a blunted mower blade. Right: sharp-cut grass

How to remove a knife from a lawn mower

Before proceeding with the partial dismantling of the mower, you need to protect yourself and her. If the device with an electric drive is enough just to disconnect from the network, then gasoline lawn mowers require preliminary training. First of all, you need to remove the cap from the spark plug. Next, fuel leaks should be excluded, that is, either drain the tank or place a sealed rubber membrane under the lid and turn off the fuel cock. Turn the mower only toward the handle, unless otherwise specified in the operating instructions. Before turning the mower upside down, be sure to squeeze the crankcase exhaust hose so as not to spill the oil.

How to Sharpen a Knife From a Makita Lawn Mower

Knives of various configurations are used in lawn mowers. In the simplest case, this is an ordinary two-bladed plate of complex shape, but the knife can also be composite. the upper blade is designed to mulch the mowed grass. Four-bladed knives are also found, which can be both composite and on a common base.

How to Sharpen a Knife From a Makita Lawn Mower

The knife can be mounted either with one bolt in the center through the shaped washer, or with two bolts with a fit on the center hole or pin. In any case, the thread on the bolts is right, respectively, you need to unscrew it counterclockwise. To block the shaft from rotation, substitute a block resting on the ground under the knife. It is advisable to remember or outline the position of the blade (s), so as not to confuse anything when reassembling. Loosen the bolts temporarily into the free holes.

How to Sharpen a Knife From a Makita Lawn Mower

Cleaning and editing

When the knife is removed, it must first be cleaned of adhering dirt and hardened herbal juice. The easiest way to do this is to use a metal trim. The strip of the knife should be clean from all sides: not to a metallic luster, but without the smallest adhering fragments.

How to Sharpen a Knife From a Makita Lawn Mower

Often, when hard objects such as stones and wood chips get into the work area, the blade is very noticeably deformed. Most blades themselves are not straight, but the cutting edge and strip 10-15 cm from it should be examined for the presence of local tubercles and curvatures. This is done with a short straight ruler.

How to Sharpen a Knife From a Makita Lawn Mower

You can straighten the blade with an ordinary hammer, whose edges of the striker are slightly rounded. The knife is laid on an even massive support (anvil), then, with weak strokes, the metal is given the correct shape. You need to edit the knife, starting from the edges of the curved section, gradually moving towards the center. The curved body of the blades is a small problem, but it is very important that the cutting parts are straightened into one straight fishing line. You also need to check the throwing blades, which often bend over from the impact. If the blades on different shoulders of the knife are bent at different angles, this will worsen the air flow and the mowed grass will not be properly mulched.

Video: How to Sharpen a Knife From a Makita Lawn Mower


How to Sharpen a Knife From a Makita Lawn Mower

Launching downhills

If the knife has not been sharpened for a long time, chipped chips are likely to appear on it. You need to get rid of them by removing the edge of the blade at a uniform angle along the entire length of the cutting section. Please note that there may be several edges on each side, in which case several cutting planes will form on the mower.

How to Sharpen a Knife From a Makita Lawn Mower

Lawn mower knives have one-sided sharpening, the descent of which, as a rule, is turned up. To bring the descent at the right angle, you should use an electric sharpener with a stone from carborundum, and in the absence of such. a small file. It is very important to remove metal evenly from both blades. Therefore, keep the same pressure and at least approximately count the number of passes of the sharpener.

How to Sharpen a Knife From a Makita Lawn Mower

Small deviations of the angle of sharpening are not critical, however, the more even the descents are brought out, the longer the knife will be. When deriving the shape of the blade, it always moves to the grain to avoid the formation of large burrs and gaps. Do not use an angle grinder for preliminary grinding. overheating can degrade the quality of the metal. However, it is possible to install a flap or disk disc under the emery paper on the angle grinder.

Blade sharpening

The purpose of sharpening itself is to eliminate small chips of the edge and to bring the descent into one straight plane. The presence of a “file” on the blade leads to a rapid decrease in sharpness, and with a rounded descent there is too much effect on the cut stems. In addition, a rounded-shaped blade becomes dirty much faster.

Sharpening the blade is best done with a flat emery bar with a grain size of about 400-600 grit; more “delicate” stones do not make much sense. Soak the bar in soapy water for 10-15 minutes and periodically moisten while turning. The knife is also sharpened for grain with a small broach of the bar from the center of the sharpened area to the edge.

How to Sharpen a Knife From a Makita Lawn Mower

When sharpening, try to adhere to the same position of the stone in order to maintain a constant angle. As with the removal of descents, sharpening should be carried out with the condition that the same amount of metal be removed on opposite blades. This condition, however, need not be strictly observed when sharpening four-blade knives.

Editing Edges

When the blades are sharpened, they need to be fixed. This is done using a piece of moisture-resistant sandpaper with a grain size of about 600-800 grit. The paper should be moistened with water and rolled into a cylinder with a diameter of 100–150 mm.

Editing aims to remove the slightest burrs and flakes, due to which the thinnest edge of the blade can wrap. The emery paper rolled into the cylinder should be slightly pressed to the plane of descent and stretched in a smooth motion from the grain. It is also recommended to make a smooth shift from the center to the edges.

When removing descents and sharpening, all manipulations were carried out with only one side of the blade. In the process of dressing, the knife is also processed from the back. Here, the paper is pressed almost close to the body of the knife, but with a slight slope towards the edge. The effort of pressing the paper during editing is very small, but the movements need to be done quite a lot, trying to eliminate large scratches on the shiny descent that remained after sharpening.

How to Sharpen a Knife From a Makita Lawn Mower

For reference: You can also sharpen the lawnmower’s knife with a rivet, similar to a conventional manual scythe. True, this requires the presence of a special device. a headstock, as well as a specific skill. But then with this method of sharpening, it is not necessary to balance the knife.

Balancing check

Before installing the blade back, you need to make sure that its shoulders have at least about the same weight. Otherwise, vibration will occur during operation, which will not affect positively the spindle durability.

Balancing is carried out mainly for double-sided single and compound knives, four-blade is not so much prone to imbalance. To check the knife, you need to clamp a smooth bar in a vise in a horizontal position. A blade is put on it through the hole in the center, after which attempts are made to install it strictly horizontally. If one of the shoulders weighs significantly more than the other, the knife will steadily turn in one direction.

How to Sharpen a Knife From a Makita Lawn Mower

The equation for the weight of the shoulders is carried out by grinding a small amount of metal from the back of one of the shoulders of the knife. It is not necessary to achieve ultra-precise balancing, however, the knife must be held at least for a few seconds in a strictly horizontal position. When the balancing is done, you can put the knife in place and finally update the look of your lawn.

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Makita 18 Screwdriver How Much

Makita 18 Screwdriver How Much

Which battery for a screwdriver is the best

Since this material deals specifically with cordless screwdrivers, before proceeding with the comparison and reviews of the tool, it is necessary to clarify what types of batteries are, what positive and negative sides they have and which one is preferred.

Varieties of batteries

Nickel Cadmium (NiCd). The largest dimensions, which are not always convenient for reasons of compactness, are batteries called nickel-cadmium and are designated “NiCd”. They are quite cheap and work like a clock. without failures, both at high temperatures and at sub-zero. You can charge them an impressive number of times. But the memory effect present here can serve an unkind service, in order to avoid that such a battery is sent for storage completely discharged to zero. Charging is also carried out only when the battery is completely dead.

Memory effect. this is a loss of battery capacity and, as a consequence, its shorter use in the intervals between recharges. If you do not wait for the full discharge of this battery, it will again begin to recharge, it "remembers"that it was not used up completely and subsequently will not give up all the energy, but only the amount that reaches this border. You have to constantly monitor the battery level. Owners of a tool with such batteries often ignore this moment, as a result, part of the capacity is gradually lost.

Nickel Metal Hydride (NiMH) Batteries called nickel metal hydride are labeled with the letters “NiMH”. They are one hundred percent environmentally friendly and weigh very little. Another significant plus is their ability to work long enough without requiring recharging. The memory effect of these batteries is present, but not as pronounced as in the previous type. Alas. they have a significant minus. This is the inability to withstand frost. Even when it’s only minus two degrees outside, such a battery starts to discharge on its own. Do not store the screwdriver in the garage without heating or in the car trunk. For storage, this type of battery also needs to be charged.

Video: Makita 18 Screwdriver How Much


Lithium-ion (Li-Ion). The third type of battery is lithium-ion. Labeled "Li-Ion". They appeared later than all. in 1991, in mass production, becoming the brainchild of the Japanese corporation Sony. They differ in the absolute absence of a memory effect, large capacity and long charge retention. They weigh forty percent less than the analogues described above. They can be charged in any state. at any charge level. Such batteries are often put on professional models, especially on screwdrivers combined with a drill.

Basic concepts

1. What does the battery capacity say? The capacity, the unit of measurement of which is called ampere-hour (A / h), determines the duration of the tool without recharging. Accordingly, they distinguish between household tools (the capacity of which is from 1.3 to 2 A / h) and professional ones with a capacity exceeding 2 A / h.

2. Charging speed. It is important when you need to do work quickly. For a household, not too expensive tool, this characteristic varies from 2 to 12 hours. But models in professional performance can be charged in an hour, or even in half an hour. Typically, such tools have lithium batteries and a pulse charger.

3. Battery voltage The voltage of the battery can vary from 3 to 36 volts. At the same time, the torque on the model at 14.4 V and at 12 V can be the same. In turn, the torque determines the power of the screwdriver and you might think that buying a tool with high voltage is not advisable. In fact, a 14.4 V battery is capable of maintaining a maximum power of the tool for a longer period and, as a result, is able to work for a longer time, until the moment when the battery charge drop starts to reduce the power of the screwdriver.

Comparison of different types of batteries:

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Metabo Bosch Makita Hammers Best

A properly working hammer drill is an excellent assistant in the household and in production. This versatile tool with many functions allows you to comfortably solve even the most complex tasks. If the punch is broken, it is not necessary to immediately carry it in for repair. A home foreman can independently disassemble and repair this tool. How to repair a punch do it yourself?

Perforator device and its mechanism

Unlike a drill, as well as an impact drill, a rotary hammer has an enhanced impact function, which puts it an order of magnitude higher in situations where it is necessary to use significant mechanical stress on the processed materials.

This is achieved by the design features of the punch device. The device is equipped with an independent mechanism for generating a powerful pneumatic push of the working tool, and this ability relieves the master from the use of physical effort when drilling and chiselling concrete and stone.

Metabo Bosch Makita Hammers Best

Sectional percussion hammer mechanism

The conversion of the rotational motion of the electric motor into the translational oscillation of the shock mechanism is carried out by creating compression between the pistons. This movement is transmitted to the drummer. The striker made of high-strength steel, in turn, sends the energy of compressed air directly to the working tool. a drill, chisel or blade. Such a device unit allows you to increase the impact power to a huge destructive force. 20 kJ.

Depending on the location of the engine, drill-shaped and barrel-shaped types of perforators are distinguished.

  1. The first type of device is similar to a drill, in which the motor is located in the same axis as the drill.
  2. In rotary hammers of the second type, the motor is mounted perpendicular to the axis of drilling.

Barrel perforators differ in large dimensions, but at the same time have a more advanced cooling system, which allows the tool to be used for a long time without stops. Devices in the form of a drill are much more compact, they are convenient when working in cramped circumstances, when access to the object is limited.

Hole Punch Diagnostics

If during operation, malfunctions in the operation of the rotary hammer become apparent, disconnect it from the power supply and conduct an external inspection. If no external signs of damage are found, you will have to disassemble the case and look for the problem inside.

One of the reasons for the failure of the device is a break in the power cord. In this case, the punch motor does not turn on. For its diagnosis, it is necessary to carefully inspect the cable connecting the tool to the network. It must not be damaged, broken or melted. A working power cord remains cold during operation. If the wire is not in order, it should be replaced with an equivalent one. The cross section of the conductive elements must correspond to the power consumed by the tool.

A multimeter is recommended for testing electrical circuits. Using this device, you can not only detect a power failure, but also “ring” the motor winding coils, determine the presence of voltage on the start button.

Conventionally, all punch malfunctions can be divided into two categories. mechanical and electrical.

Malfunctions in the mechanical part: the crown cannot be pulled out of the barrel, the drill does not hammer, the drill does not rotate and others

The mechanical category of malfunctions includes malfunctions that occur when the engine is running:

  • the drill does not hammer;
  • the drill does not rotate;
  • the crown is not pulled out of the trunk (jammed);
  • the chisel does not hold in the cartridge (pops up);
  • extraneous sounds are heard inside the mechanism, rattle, vibration.

Failures in the electrician: the motor does not rotate, spark brushes on the collector and other types of breakdowns

The following symptoms indicate problems with the electrical part of the punch:

  • the motor does not rotate when turned on;
  • brushes sparkly on the collector;
  • the smell of burning insulation emanates from the body;
  • caustic smoke comes out of the tool during operation.

In order to find out and eliminate the cause of all these phenomena, the hammer must be disassembled.

The procedure for disassembling and assembling the device

You should only start disassembling yourself if you have the proper tools and equipment. To repair the puncher with your own hands you will need:

  • screwdrivers with different slots;
  • vise;
  • wrenches and socket (hex) wrenches;
  • pullers for bearings.

In addition, replacement parts, rubber seals and gaskets will be needed. To lubricate the gears of the mechanisms you will need:

  • grease;
  • rags;
  • cleaning solvent.

In case of self-repair of an electric motor, in addition to a multimeter, you will need:

  • spare carbon (or graphite) brushes;
  • copper wire of the required section;
  • rewind pattern.

Cartridge removal

Disassembly of the punch begins with the removal of the cartridge. As a rule, this is an SDS-plus system cartridge, which is disassembled with a flat-head screwdriver. In this case, the cartridge should not have a drill or a chisel.

There are times when the drill sticks and it is not so easy to get it. Then you need to gently knock the cartridge around with a rubber mallet and pour a few drops of WD-40 type grease inside. After a few minutes, try again, the drill should be easily removed. After this, you can begin to disassemble the cartridge itself. Procedure:

  1. Pull the plastic skirt down.
  2. Use a screwdriver to remove the rubber protective boot.
  3. Release and remove the snap ring located behind the boot.
  4. Remove the plastic boot, spring, retaining plates and balls.
  5. Clean all parts from old grease and put in a clean place.

Video: how to remove a drill stuck in a cartridge

Mode switch dismantle

To remove the mode switch, you must:

  1. Turn the toggle switch to the “strike” position (the icon with the image of a hammer) and turn it about 1 cm lower.
  2. Release the lever from the socket.
  3. Pull the lever towards you.

How to check the start button and brushes

To get to the collector brushes and start control buttons, you need to remove the back cover. For this, two or three screws are unscrewed (depending on the model) from the plastic case.

If the cause of the malfunction was due to the wear of the brushes, you can eliminate it by installing a new pair. The working length of the brush must be at least 8 mm. The rubbing surface. without traces of scale or chips.

The start button is checked with a multimeter. It must be remembered that the engine speed control system is also located inside the trigger. If melted plastic is visible on the button body, it should be replaced entirely, since it will no longer function properly.

Attention! It is strictly forbidden to check the operation of the button when the tool is connected to the network!

After replacing the button, it is necessary to replace the housing cover, do not forget to tighten the screws securely. Only then can the perforator work.

How to disassemble an electric motor

To disassemble the electric motor, it is necessary to disconnect the motor housing from the gearbox. Between themselves they are fastened with four screw screws. If you unscrew them, the mechanical part is easily separated from the plastic casing. When disassembling, the rotor of the motor is removed from the guide sleeve, freeing up access to the gearbox. Accordingly, it becomes possible to examine the electrical components of the engine.

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The motor consists of a movable rotor and a rigidly fixed stator. The rotor rotates under the action of an electromotive force arising on the windings, consisting of turns of a copper conductor. Inspection of the windings is to determine the integrity of the insulation, the absence of a short circuit between the turns. This is done with a multimeter by successive measurements of resistance on the lamellas. In the event of an interturn short circuit, the anchor must be replaced or repaired. Stator windings can be rewound independently at home using a special template.

The anchor, as a rule, changes as a whole, together with bearings and an air intake plate.

How to disassemble and check the gearbox: how to remove the plastic case, remove the “drunken bearing” and other elements

In order to determine the malfunction of the gearbox, it must be completely disassembled. To do this, the plastic case is removed, the gearbox is thoroughly cleaned of old grease. From the gear case are disconnected:

  • floating bearing;
  • drive gear shaft;
  • raster sleeve;
  • sleeve with a piston.

The floating bearing, also referred to as the “drunk bearing”, is mounted in the aluminum gear housing with a staple, which must be pressed with a flat screwdriver. The released bearing is removed and replaced if necessary. In addition, you should pay attention to the fact that inside the "drunken bearing" is a needle bearing on which the drive gear rotates. When the hammer is in impact mode, it experiences heavy loads, and therefore often fails. The new bearing is purchased separately or assembled with a gap.

The raster sleeve contains an impact bolt, which is mounted inside with a metal retaining ring. On the sides of the sleeve there are two technological holes through which access to the locking mechanism. After the ring is removed, the impact bolt freely falls out of the sleeve. Inside it is located directly the drummer made of high alloy steel.

When repairing or replacing an impact bolt, it is also necessary to replace the rubber sealing bushings, which ensure the tightness of the mechanism. All parts of the hammer are subject to heavy lubrication with special grease.

In the plastic casing of the gearbox at the output of the raster sleeve there is another needle bearing, which must be well lubricated.

Video: how to fix a punch and replace an impact bolt

Possible malfunctions, causes and solutions

To repair the punch with your own hands, you must first determine the external manifestations of malfunctions.

The punch does not hit

If the puncher stopped beating when switching to impact mode, but the drill rotates, it is most likely that the floating bearing is damaged. The solution will be to replace it with a new one.

The second possible reason is the disruption of the shock mechanism. Often during overloads in work, the steel hammer strikes, this first leads to a weakening of the impact, and then to its complete absence. The striker must be replaced.

The third probable cause is wear or damage to the piston group of the perforator. The sleeve and piston should be replaced.

The rotary hammer does not spin or drill

If the chuck does not rotate when you press the start button, the cause can be determined by sound. If the electric motor is buzzing, but does not turn the cartridge, most likely, something does not allow the rotor to rotate inside the gearbox. What happened to the engine will have to figure out by disassembling the mechanical part of the tool.

If the engine does not hum when turned on, it is more likely that the motor has failed. Opening the lid of the device, it is necessary to determine what exactly led to this phenomenon. This can be an open circuit, a breakdown of the start button or a short circuit in the coil windings. With the help of a tester, a specific reason is determined and appropriate repairs are made.

The drill does not hold in the cartridge and flies out

Incontinence of tool accessories can occur during continuous operation. The drill or chisel inserted into the cartridge does not hold and flies out during operation. With such a tool it is not only impossible to continue chiselling, it is also very dangerous. a chisel that has flown out can cause injury.

The reason for tool incontinence lies in the wear or breakage of the cartridge. The cartridge must be disassembled and determined what the problem is. The balls may have deformed, a workout has appeared on the restrictive ring, or a fixing spring has slipped. Usually, after replacing a damaged part, the cartridge starts functioning normally again.

Video: why drills fly out of a punch

Sparkle brushes

Brush sparking is a fairly common occurrence when using the tool in dusty environments. As a rule, sparking is a consequence of the development of the material of the brushes themselves. Replacing the situation with new ones will help to correct the situation; sparks will no longer fly out.

If not, the cause must be sought in the stator or rotor windings. It is possible that a large amount of dust penetrating the engine abrased the protective varnish covering the copper conductors. And this entails a short circuit. The presence of inter-turn circuit is checked by electrical devices (multimeter).

Preventative maintenance of the tool: replacing the brushes, lubricating the bearings of the rotor working shaft and additional varnishing of the windings on the coils will reduce the likelihood of breakage.

In addition, it should be borne in mind that dust can adhere to the grease of the bearing located near the collector. To prevent this, the collector is degreased with a swab dipped in alcohol or solvent.

The puncher is very hot

If the rotary hammer overheats during operation, this is a clear sign of a malfunction in the normal operation of the electric motor. First of all, to prevent overheating, the operating mode of the device must be observed:

  • pause at regular intervals;
  • after loading give the tool the opportunity to idle.

When drilling, it is recommended to use a periodic mode: apply maximum power no more than 1 minute, then turn on idle for 3-4 seconds.

If the case temperature does not decrease, then it is necessary to revise the electric motor. Having felt a characteristic odor from under the instrument cover, you must immediately stop working and disconnect the device from the network. It can be disassembled only after complete cooling.

The hammer does not hold a cartridge

Sometimes there is a situation when a cartridge flies with a snap on a working punch. This is due to wear on the holder housing of the cartridge at the end of the raster sleeve, which is a snap ring. When it breaks, the fixation is broken and during the push a rubber boot flies, followed by a spring and balls.

You can restore the cartridge to normal operation by installing a new retaining ring. This is done quickly and does not require any additional devices other than a conventional screwdriver.

Replacing the main components of the hammer drill

The replacement of key elements is best done before the part becomes worthless. This will protect the tool from more severe damage, the correction of which will cost more and take more time. Most often you have to perform a replacement:

How to change bearings

If during a routine inspection the grease is visible on the bearing, it cracks or crunches when scrolling by hand, this means that it is time to replace it. Dismantling of the bearing is carried out using a special puller, consisting of a screw part and a device for gripping the housing of the bearing sleeve. Tightening the thread creates a force that removes the bearing from the shaft.

The installation of a new bearing at the workplace is carried out with a rubber or wooden hammer. When installing, it is important to prevent the bearing axis from skewing with respect to the shaft axis. Lubricate the part after installation.

How the start button changes

To replace the start button, you must remove the cover that covers the electrical equipment of the punch. Then you should disconnect the contacts of the conductors connected to it and pull out the button housing from the seat. In this place, install a new button, connect the contacts and assemble everything in the reverse order.

How to remove and change brushes

The replacement of the carbon brushes of the collector is carried out by an electric screwdriver. If you unscrew the lid, access to the brushes will appear. Each part is removed in turn from the nests of the brush holder. In some models, the device of the clamping mechanism differs, as a rule, this is a spiral spring, which must be removed during replacement.

Attention! Before replacing the brushes, the hammer must be disconnected from the power supply.

How to replace a cartridge

In most cases, the cartridge can be repaired. If the wear of individual parts has exceeded the permissible limits or the rubber boot and the plastic skirt are damaged, it is advisable to change the cartridge as a whole.

The procedure for replacing the cartridge is clear from the above procedure for disassembling the punch.

Features in the repair of barrel drills

All the described procedures for assembling and disassembling the mechanisms of perforators are true for its barrel version. However, there are several nuances that must be considered when repairing it. The vertical arrangement of the engine at right angles to the impact mechanism somewhat changes the disassembly order. So, to gain access to the gearbox and piston, it is necessary to remove the plastic cover located in the upper part of the tool case. This facilitates the repair of the mechanical part of the device if the shock function suddenly disappears.

Access to the electrical part of such a perforator is carried out after removing the lower casing. And the replacement of the brushes is simplified, since there are holes on the sides of the glass through which they can be easily removed.

It should be noted that many professional barrel drills do not have a drilling mode. Since their purpose is to a greater extent in drilling and chiselling of heavy concrete surfaces, they are equipped with an SDS-max cartridge with a shank of 18 mm. There is no fundamental difference in the design of the SDS-plus cartridge, but the dimensions differ markedly. L-shaped punchers are recognized as more reliable in operation and belong to the rank of a professional tool.

Video: how to repair a vertical hammer drill

Routine Care and Storage

In order for the tool to serve for a long time and in good condition, you need to follow simple rules.

  1. Before starting work, conduct a quick inspection of the technical condition of the tool. In no case do not ignore the signs of a malfunction, if any.
  2. At the end of work, clean the hammer from dust and debris. It is advisable to blow a stream of air from the vacuum cleaner.
  3. When transporting in the cold season, before starting work, give the device at least 20 minutes to “acclimatize” the device. The grease should thaw and become elastic.
  4. Work in compliance with the operating standards described in the technical data sheet of the tool.

Store the hammer in a dry and warm place. For long-term preservation, it is recommended to pack in a plastic bag and a cardboard box. Prevent moisture from entering electrical parts, including condensate from the air.

Aware. means armed. Knowing the intricacies of the device of the mechanism of perforators, you can repair the tool yourself and in the shortest possible time. However, if you timely look under the casing of the punch, clean and lubricate the mechanisms, then it is quite possible that you will not have to resort to repair at all. Regular maintenance of the instrument will help extend its life.

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Bosch Screwdriver Or Makita Which is Better

What is better Bosch or Makita: specific examples

The modern market for building power tools offers a very large selection, both in terms of the brands presented, and in terms of specific models. But which brand is better, only experienced professionals know. And this is a big problem. a beginner who made the wrong choice can lose not only his money, but also something much more. Since poor-quality construction or repair work in some cases leads not only to injuries and financial losses, but also to deaths. And so that this does not happen, the tool used in such robots must be of the best quality.

For example, you can compare Bosch and Makita for the brands of rotary hammers, grinders and screwdrivers they sell.

Bosch or Makita punch, which is better?

In this market segment, you can compare the models BOSCH 2-24D and Makita HR2470.

As you can see from the table, the difference between the models is very small. However, for the sake of fairness, it should be noted that in the BOSCH 2-24D, a chiseling function is better developed. In contrast, we can say that the Makita HR2470 is equipped with special carbon readouts that increase the service life, and this model is also easier and faster. What is more important for professional use, since it is important during long work and will save in the future. Therefore, in this example, the last mark wins between bosch or makita.

Bosch or Makita angle grinder, which is better?

Moving on to the next pair, this time compare the Bosch GWS 850CE and Makita GA5030.

In this comparison, the GWS 850CE looks like a clear leader because of its greater power, but there are a lot of complaints about it. In particular, to a too hard switch, as well as to the factory lubrication of the gearbox. The latter applies only to the Russian assembly. In addition, professionals blame for the lack of a complete set of this model.

Regarding the model Makita GA5030, it has a clear advantage is a small weight, due to the small size of the tool. Thanks to this, the hands are not so tired. Otherwise, these angle grinders are almost identical in terms of performance and functionality. Therefore, choosing only between them is difficult to point out the unique advantage of a particular model. However, if you take the approach, the choice again is inclined in favor of Makita, because of the supremacy of simplicity and convenience over purely technical characteristics.

Makita or Bosch screwdriver, which is better?

When comparing screwdrivers of these brands, perhaps you should not resort to the previously selected method, because if you compare, you need twin tools. And in this case, they are difficult to pick up, except that the Bosch GSR 10.8-2-Li and Makita DF330DWLE models. But these are tools of old models and their technical characteristics are already outdated. Therefore, comparing screwdrivers it will be better to summarize the pros and cons of Bosch or Makita.

Bosch brand features:

Germany. Assembly, as a rule, Malaysian;

Basically three year warranty (one year in makita);

The best performance characteristics and, as a consequence, more weight.

Makita brand features:

Japan. The assembly is usually Chinese;

Affordable prices (compared to Bosch).

As you can see the difference between the brands in their approach. For Bosch, this is German precision, reliability and power. Makita is characterized by convenience, economy in terms of price and excellent equipment. In other words, the former are guided by the instrument itself, and the latter by the one who will use it. That allows you to give a clear answer to who is better. Namely:

If the tool is needed for a beginner and not for frequent use, then Makita should be chosen.

While professional builders are better off choosing Bosch, a Polish 3 year warranty and reliability are more important when using power tools permanently.

Which screwdriver is better to choose Makita, Hitachi or Bosh?

Video: Bosch Screwdriver Or Makita Which is Better


Each owner of his home and a professional builder want to have a universal screwdriver in the house with good technical characteristics. Professionals need a versatile tool that has great power, good equipment and the maximum number of settings. Manufacturers offer various models of screwdrivers. The MAKITA BHP442RFE and BOSCH GSR 10.8-2-LI models have similar characteristics. But, the most convenient to use, is the HITACHI DS12DVF3 cordless tool.

One of the drawbacks of these models is the lack of battery power, so they are charged when the instrument is completely discharged.

MAKITA BHP442RFE

The tool, of a high price category, has a lithium-ion battery, one of the most popular models. The screwdriver, quickly recharges, has a pulse charger, has 16 steps for setting torque. The advantages of the tool are long-term operation without recharging, it is very functional, it is equipped with a backlight and a motor cooling system, it has a small size and weight. The maximum number of revolutions is 1300 per minute. The battery is able to charge in 22 minutes.

HITACHI DS12DVF3

The tool, a relatively low price category, is intended for professionals, has two nickel-cadmium batteries, an additional flashlight. The design of the tool protects it from shock when dropped, the keyless chuck is included. The screwdriver has the function of smoothly adjusting the speed, the maximum speed of 1100 per minute, which allows you to work comfortably. The tool is equipped with 22 steps of torque, the charger is included in the package.

BOSCH GSR 10.8-2-LI

The professional tool is very compact, has a charge indicator with LEDs, is equipped with all the necessary functions and additional settings. The maximum speed of 1200 per minute. A screwdriver has a battery that is able to work four times longer than previous models, has 25 steps of torque. One of the functions of the tool, protecting the battery from overheating and full discharge, has an LED backlight. The screwdriver cable can be connected to the USB port, the tool handle is equipped with a shock-absorbing gasket, a quick-clamping chuck is included.

Makita or Bosch. which is better?

When choosing a hand tool, there is a dilemma today. By and large, there are two leaders on the market who do not want to give in to each other “not a span”. We are talking about such venerable manufacturers as Makita and Bosch. In specialized forums, disputes are constantly flaring up, which translate into intense discussions. Someone assures that better Makita tools do not exist. Others claim Bosch reliability and ergonomics. On whose side is the truth?

An authorized Makita dealer is able to provide a wide range of equipment on favorable terms. Bosch prices are slightly higher. This is understandable, because most of the technical innovations that are used by many brands in hand tools were first used in Bosch.

Categories that Masters Hunt

Bosch Screwdriver Or Makita Which is Better

In fact, in order to get a positive rating, a tool must have only a few categories:

  • affordable price;
  • high resource;
  • maintainability;
  • ergonomics.

According to the first indicator, Makita wins unambiguously. Regarding the resource, everything is not so simple. The fact is that Bosch has two lines of tools. household and professional (yellow and blue).

Makita has an exceptionally professional line of tools. But let’s not forget that back in the early 90s, Makita created a subsidiary company Maktec.

It is she who sells household tools. It turns out that manufacturers are equal in this category.

Any professional repairman will confirm that the design of most Bosch equipment is more complicated. But it provides somewhat more functionality. In comparison, Makita is easier. However, this simplicity provides a huge resource. the tool simply does not break.

The possibility of continuous work is very important.

Bosch Screwdriver Or Makita Which is Better

Regardless of whether a professional tool or a household one, if long work is required, the master should be able to carry it out. This indicator largely depends on the ergonomics of the instrument.

Any tool (unless it is pneumatic) has a very significant weight. And if, for example, it is necessary to perform work under the ceiling, holding the tool on half-extended arms, you get tired very quickly.

But due to the use of special handles, the tool can be taken differently. Due to this, fatigue in the hands accumulates much more slowly. In terms of ergonomics, both brands are also equal. So it turns out that with a minimal advantage, Makita prevails.

See also:

  • Find out which screwdriver is recommended for purchase.

The experienced master will issue his verdict in the ongoing dispute between adherents of Bosch and Makita:

Bosch or Makita screwdriver which is better. which screwdriver is better than Bosch or Makita? 2 answers

In the Other services section, to the question of which screwdriver is better than Bosch or Makita? the best answer given by the author Magomedov pyrmagomed is that Bosch is no better. Judge for yourself. Bosch does everything at once, and Makita is just a tool. My friend is engaged in wood. So he took makita to himself and presented it to me for the DR. I use and am very satisfied. Charges in 2 hours. Very ergonomic. Although Bosch, in principle, is also a good tool.

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Makita Hr2470 rotary hammer Disassembly Assembly

Even very reliable Makita rotary hammers break down over time.
Any breakdown is eliminated, you only need to have straight arms and perseverance.
In addition to electrical malfunctions, rotary hammers are also subject to mechanical breakdowns.
The work of rock drills with solid materials in a dusty environment shortens the life of the machine and requires user intervention to perform preventive maintenance.

Repair of the mechanical part of the Makita 2450 and 2470 puncher

Any repair of the tool begins with the determination of the nature of the malfunction and disassembly.

A Makita 2450 and 2470 rotary hammer can be repaired by a user with basic locksmithing skills and knowledge of electrical safety requirements.

This article discusses the mechanical part of the Makita puncher, the main malfunctions and how to solve them.

Makita Hr2470 rotary hammer Disassembly Assembly

Dismantling the mechanical part of the Makita 2470 rotary hammer

To get to the mechanical part of the punch, you need to remove or disassemble the cartridge.

Dismantling the quick release chuck
Place the hammer drill on the back of the cabinet on the surface of a table covered with a clean cloth or paper. Using tweezers or a screwdriver, remove the rubber tip 35, item 1.

Makita Hr2470 rotary hammer Disassembly Assembly

Carefully loosen the annular spring, pos. 2, the clutch cover, pos. 3, the steel ring, pos. 4. You will reach a steel ball with a diameter of 7 mm, pos.20.

Makita Hr2470 rotary hammer Disassembly Assembly

Now you can remove the case of the mechanical part
It is black.
Using a screwdriver, unscrew the four screws at the end of the case.

Makita Hr2470 rotary hammer Disassembly Assembly

Holding the black case with your right hand, press the end of the shaft from which the cartridge was disassembled with your thumb. The plastic case is easy to remove.

Next, remove the gearbox shaft.

Makita Hr2470 rotary hammer Disassembly Assembly

To disconnect the mechanical part from the electric, you must first remove the electric brushes.
Remember! In the lower part of the body, the rotor is held by electric brushes, which must be removed.

After checking that the electric brushes are disconnected from the lamellas of the rotor, use a screwdriver to pry the metal case of the perforator at the border of the green plastic case.

Now we proceed to disconnect the rotor from the mechanical part of the punch

Makita Hr2470 rotary hammer Disassembly Assembly

pa The rotor is held in the mechanical part due to helical gears of the gearbox.
If you take the rotor case in one hand, and the mechanical part in the other case and pull it in different directions, swinging, you will separate these two nodes.

You get such a knot in the old grease.

Makita Hr2470 rotary hammer Disassembly Assembly

Next, unscrew the two M4 × 12 bolts, pos. 43, using the hexagon, item 2666273-7 with the internal hexagon head.
Pull out the shaft with the intermediate spur gear 10 pos. 80, art.226399-7.
from the inner case pos. 49, art. 153687-8. Clean parts from old grease.

You get such a mountain of clean details.

Makita Hr2470 rotary hammer Disassembly Assembly

Now carefully review the details, immediately discard the rubber rings, picking up new ones.
Replace defective parts with new ones.

Mechanical makita 2450 and makita 2470 rock drill

Common mechanical problems with Makita rotary hammers include:

  • destruction of the quick-release cartridge;
  • bearing failure;
  • breakdown of the shock mechanism;
  • punch barrel wear;
  • wear of rubber strikers and striker;
  • gear breakage.

Repair of the perforator cartridge is done to replace the anther and rubber ring, as well as the conical spring and the steel ball, which provides clamping of the working tool (drill). What does the working tool indicate? namely, the drill is poorly held in the cartridge.

The main reason is the wear of a steel ball 7.0 pos.20, art. 216022-2. Ball wear occurs from contamination of the barrel of the cartridge due to ingress of dust and dirt.

The general view and arrangement of the Makita rotary hammer cartridge is shown in the photo below.

Makita Hr2470 rotary hammer Disassembly Assembly

Do-it-yourself makita 2450 rotary hammer cartridge repair is easy to do. The cartridge must be disassembled, freed from old grease, discard rubber parts, replace defective ones.

complex failures require knowledge of the mechanical design of the Makita 2450 rotary hammer.

Having determined the nature of the malfunction of the Makita rotary hammer, proceed to disassemble the mechanical part called the gearbox.

Disassemble the mechanical part according to the attached video.
Release it from the old grease.
Carefully inspect all parts, their integrity, level of wear. All rubber products during any disassembly require replacement.

Makita Hr2470 rotary hammer Disassembly Assembly

Consider repairing a perforator barrel. We will analyze the mechanism completely.
Video disassembly, lubrication and assembly of the Makita rotary hammer

Video: Makita 2450 rotary hammer bulkhead

Repair of parts of a shaft of the Makita 2450 puncher

Remember! In the lower part of the body, the rotor is held by electric brushes, which must be removed.

At the next stage, the rotor must be disconnected from the removed mechanism. The rotor is disconnected from the mechanism simply by pulling out, because it is held by the friction of two helical gears.

It turned out such a dirty knot.

Makita Hr2470 rotary hammer Disassembly Assembly

Now you need to separate the shaft of the percussion mechanism.

Makita Hr2470 rotary hammer Disassembly Assembly

Most often, rubber rings, striker poses wear out. 24, compressor spring pos. 18. and cylinder parts.

Makita Hr2470 rotary hammer Disassembly Assembly

Here’s how barrel parts wear out and collapse during improper use of the tool.

Makita Hr2470 rotary hammer Disassembly Assembly

Consider the most difficult malfunction. failure of the shock mechanism.
The characteristic signs of failure of the impact mechanism is the absence of impact and the unpleasant noise of a working punch in the “Impact” mode.

Video: A moment of vandalism) (21) Makita HR 2450 rotary hammer Strong impact in impact mode

Such a malfunction is typical for those perforators that during operation were pressed strongly against the work surface.
Having disassembled the gearbox, we remove debris and pieces of foreign objects. We find the defective part and clean everything from the old grease.

Very often the striker pos. 24 is destroyed, art. 324396-8, which is part of the trunk.

Makita Hr2470 rotary hammer Disassembly Assembly

metal ring pos. 27. art. 324216-6.

Makita Hr2470 rotary hammer Disassembly Assembly

Discard damaged parts, replace with new ones, cover with a thin layer of grease. Parts are ready for assembly. But more on that in the next article.

Makita 2450 rotary hammer disassembly abstract

Hammer drill, it is a percussion drilling tool that immediately performs the function of percussion and drilling equipment while working with particularly strong materials.

The device used two ideas at once: the tool spins and moves longitudinally, transmitting the impulse of impact to a solid surface.

Hammers always operate in extreme environments with the highest degree of dust.

The uptime is influenced not only by the working conditions, but also by the quality of the components included in the tool.

Makita 2450, 2470 rotary hammers are reliable tools of high-quality work. Even the most reliable tool requires proper care and timely maintenance.

To perform maintenance of Makita 2450, 2470 rotary hammers, it is imperative to study the internal contents of the tools included in the components. A real annotation will help you find out the weak spots of a Makita punch.

To perform rotary hammer repair Makita 2450, 2470 on their own is allowed a person with locksmithing abilities, having a baggage of knowledge of electrical engineering.

Remember! When performing a punch repair, you must comply with safety regulations when working with electrical appliances.

Makita 2450 and 2470 rotary hammers are assembled practically according to a similar scheme and, in fact, from similar, interchangeable parts. Repairing them is no different.

Type of punch Makita 2450

For ease of repair, the assembly diagram and catalog of parts for Makita rotary hammers are given below.

Punch assembly diagram Makita 2450

The device of Makita 2450 and 2470 punchers

Hammer drill Makita conditionally consists of electronic and mechanical parts. At the same time, the mechanical assembly of the punch is located in a dark plastic case, and the electronic part of the punch is hidden under a greenish plastic case.

The procedure for disassembling the mechanical part of the punch

Read the same

The mechanical assembly is designed to transmit the rotational moment of the shaft to the tool, creating not so much torque and translational shock impulse.

The task of the mechanical assembly is to transmit rotation from the rotor to the tool, providing the tool in this case with longitudinal movement.

Disassembly of the punch begins with the removal of the quick-detachable cartridge.

Quick Release Chuck Parts

Having disassembled the cartridge, remove the four screws pos. 10 securing the gear case cover pos. 14 mechanical block and the case of the punch and, pressing on the end of the shaft of the punch, remove the black plastic cover.

Repairs rotary hammer gear Makita HR 2450 do it yourself. most comprehensive review

I got to my own punch makita HR 2450, who has lost a hit is at its peak. There is an internal blow, but to the peak.

We repair Makita HR 2450 Replacement of the metal case Assembly of the Makita HR2450 puncher

Remove the cover of the mechanical unit

To remove the mechanical block from the greenish stator housing, you need to:

      1. Unscrew the three screws pos.70,75,76 holding the cover pos.69 in the handle of the punch;
      5. Remove the cover;
      3. After releasing the springs of the brush holders pos.63.66, remove the carbon brushes pos.65.

Now, of course, pull the mechanical block out of the stator housing.

Type of mechanical block

Having released the mechanical block, it is necessary to disconnect the rotor from it. Rotor pos. fastened in the mechanical block by friction of the teeth of the gears and pulled out by staggering and disconnecting immediately.

Disassembly mechanical block shock assembly

The mechanical assembly is assembled on the inner case, item 49. To remove the intermediate shaft, unscrew the two screws pos. 43 at the base of the housing. Another intermediate shaft is fixed by the lever of the mode switch.

Two words about the mode switch

In Makita 2450, 2470 rotary hammers the lever which provides the tool with three operating modes is installed. The hammer drill can simply drill, simply hammer, and hammer while drilling. The switch lever is worn on the axis of the inner case and is fixed by the compression spring pos. 85, the washer pos. 87 and the lock ring pos. 86.

It is time to remove the intermediate shaft.

Read the same

Dismantling the countershaft

To disassemble the countershaft, use the diagram provided with the true annotation.

Photo of the circuit of the intermediate shaft indicating the disassembly order

From the shaft pos. 40, remove everything in order:

  • a). bearing pos. 46 and ring pos. 47;
  • b) spur gear pos. 42;
  • in). rolling bearing pos.41;

And at the same time, remove the shaft:

  • d). flat washer 12 pos. 35;
  • e). bearing 606 pos.36;
  • e). snap ring S-7 pos 37;
  • g). compression spring 7 pos. 38;
  • h). clutch pos. 39.

The procedure for disassembling the shaft of the barrel of the percussion mechanism

Video: Makita Hr2470 rotary hammer Disassembly Assembly


To disassemble the shaft of the percussion mechanism, you need to remove it from the inner housing.

From the shaft, you need to remove the cylinder pos. 32, inserted into the internal cavity of the shaft.

The cylinder is not difficult to understand:

      1. With its use, you need to get the drummer pos. 30;
      2.4. The piston hinge pos.34 is knocked out;
      3. Two flat washers pos.33.35 are removed.

To disassemble the shaft itself pos. 21 of the shock mechanism, it is necessary to remove the unfamiliar shaft of the cartridge installation:

  • – annular spring 28 pos.16;
  • – the puck 30 pos.17;
  • – compression spring 31 pos. 18;
  • – spur gear 51 pos.19;
  • – metal ball 7.0 pos. 20.

And do not know the familiar internal cavity of the shaft:

  • – annular spring 28 pos. 29;
  • – rubber ring pos. 28;
  • – iron ring pos. 27;
  • – rubber ring 15 pos. 26;
  • – ring 9 pos. 25;
  • – flat iron washer 28 pos. 22.

Disassembled shaft shaft

Dismantling the electrical part of the Makita 2450, 2470 rotary hammer

As part of the electronic part of the Makita rotary hammer 2450,2470 includes:

      rotor pos. 54;
      stator pos. 59;
      TG813TLB-1 switch pos. 68;
      carbon brushes SV-419 pos.65;
      brush holder pos.63.66.

To remove the stator, it is enough to knock on the end of the plastic greenish case of the stator unfamiliar with a wooden mallet, as it is also called a bar.

Alas, first you need to unscrew the two self-tapping screws 4 × 60 mm pos. 57.

With frequent tapping on the housing, the stator spontaneously protrudes beyond the edges of the housing, and then is removed by hand.

Other elements of the electronic part of the Makita 2450 rotary hammer as it is also called 2470 are simply dismantled, since they are not fastened with anything.

Read the same

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Even very reliable Makita rotary hammers break down over time.
Any breakdown is eliminated, you only need to have straight arms and perseverance.
In addition to electrical malfunctions, rotary hammers are also subject to mechanical breakdowns.

Content:

The work of rock drills with solid materials in a dusty environment shortens the life of the machine and requires user intervention for repair.

Repair of the mechanical part of the Makita 2450 and 2470 puncher

Any repair of the tool begins with the determination of the nature of the malfunction and disassembly.

A Makita 2450 and 2470 rotary hammer can be repaired by a user with basic locksmithing skills and knowledge of electrical safety requirements.

This article discusses the mechanical part of the Makita puncher, the main malfunctions and how to solve them.

Dismantling the mechanical part of the Makita 2470 rotary hammer

To get to the mechanical part of the punch, you need to remove or disassemble the cartridge.

Dismantling the quick release chuck
Place the hammer drill on the back of the cabinet on the surface of a table covered with a clean cloth or paper.

Using tweezers or a screwdriver, remove the rubber tip 35, item 1.

Carefully loosen the annular spring, pos. 2, the clutch cover, pos. 3, the steel ring, pos. 4. You will reach a steel ball with a diameter of 7 mm, pos.20.

Now you can remove the case of the mechanical part
It is black.
Using a screwdriver, unscrew the four screws at the end of the case.

Holding the black case with your right hand, press the end of the shaft from which the cartridge was disassembled with your thumb. The plastic case is easy to remove.

Next, remove the gearbox shaft.

To disconnect the mechanical part from the electric, you must first remove the electric brushes.
Remember! In the lower part of the body, the rotor is held by electric brushes, which must be removed.

After checking that the electric brushes are disconnected from the lamellas of the rotor, use a screwdriver to pry the metal case of the perforator at the border of the green plastic case.

Now we proceed to disconnect the rotor from the mechanical part of the punch

Makita Hr2470 rotary hammer Disassembly Assembly

pa The rotor is held in the mechanical part due to helical gears of the gearbox.
If you take the rotor case in one hand, and the mechanical part in the other case and pull it in different directions, swinging, you will separate these two nodes.

You get such a knot in the old grease.

Next, unscrew the two M4 × 12 bolts, pos. 43, using the hexagon, item 2666273-7 with the internal hexagon head.
Pull out the shaft with the intermediate spur gear 10 pos. 80, art.226399-7.
from the inner case pos. 49, art. 153687-8.

How to repair a Makita hammer drill

Clean parts from old grease.

You get such a mountain of clean details.

Makita Hr2470 rotary hammer Disassembly Assembly

Now carefully review the details, immediately discard the rubber rings, picking up new ones.
Replace defective parts with new ones.

Mechanical makita 2450 and makita 2470 rock drill

Common mechanical problems with Makita rotary hammers include:

  • destruction of the quick-release cartridge;
  • bearing failure;
  • breakdown of the shock mechanism;
  • punch barrel wear;
  • wear of rubber strikers and striker;
  • gear breakage.

Repair of the perforator cartridge is done to replace the anther and rubber ring, as well as the conical spring and the steel ball, which provides clamping of the working tool (drill). What does the working tool indicate? namely, the drill is poorly held in the cartridge.

The main reason is the wear of a steel ball 7.0 pos.20, art. 216022-2. Ball wear occurs from contamination of the barrel of the cartridge due to ingress of dust and dirt.

The general view and arrangement of the Makita rotary hammer cartridge is shown in the photo below.

Makita Hr2470 rotary hammer Disassembly Assembly

Do-it-yourself makita 2450 rotary hammer cartridge repair is easy to do. The cartridge must be disassembled, freed from old grease, discard rubber parts, replace defective ones.

complex failures require knowledge of the mechanical design of the Makita 2450 rotary hammer.

Having determined the nature of the malfunction of the Makita rotary hammer, proceed to disassemble the mechanical part called the gearbox.

Disassemble the mechanical part according to the attached video.
Release it from the old grease.
Carefully inspect all parts, their integrity, level of wear. All rubber products during any disassembly require replacement.

Makita Hr2470 rotary hammer Disassembly Assembly

Consider repairing a perforator barrel. We will analyze the mechanism completely.
Video disassembly, lubrication and assembly of the Makita rotary hammer

Video: Makita 2450 rotary hammer bulkhead

Repair of parts of a shaft of the Makita 2450 puncher

Remember! In the lower part of the body, the rotor is held by electric brushes, which must be removed.

At the next stage, the rotor must be disconnected from the removed mechanism. The rotor is disconnected from the mechanism simply by pulling out, because it is held by the friction of two helical gears.

It turned out such a dirty knot.

Now you need to separate the shaft of the percussion mechanism.

Most often, rubber rings, striker poses wear out. 24, compressor spring pos. 18. and cylinder parts.

Here’s how barrel parts wear out and collapse during improper use of the tool.

Consider the most difficult malfunction. failure of the shock mechanism.
The characteristic signs of failure of the impact mechanism is the absence of impact and the unpleasant noise of a working punch in the “Impact” mode.

Video: A moment of vandalism) (21) Makita HR 2450 rotary hammer Strong impact in impact mode

Such a malfunction is typical for those perforators that during operation were pressed strongly against the work surface.
Having disassembled the gearbox, we remove debris and pieces of foreign objects. We find the defective part and clean everything from the old grease.

Very often the striker pos. 24 is destroyed, art. 324396-8, which is part of the trunk.

metal ring pos. 27. art. 324216-6.

Discard damaged parts, replace with new ones, cover with a thin layer of grease. Parts are ready for assembly. But more on that in the next article.

How to repair a Makita HR 2450 hammer drill if the shock mode is lost

Makita power tools have long established themselves as professional, reliable and easy to maintain. In addition, it has good maintainability and a relatively low price.

Of all the ruler ranges, I would like to dwell on the Makita HR 2450 model. The tool is very convenient in operation, has three operating modes and withstands very long loads. For the author of these lines, the puncher worked faithfully for more than six years without damage. over, it was used in intensive loads.

But as you know, nothing eternal happens. And reliable technology breaks down. Once, in the midst of work, he stopped pecking. In the rotation mode, the machine worked, and the blow suddenly disappeared.

The gearbox was disassembled and the cause of the breakdown was identified. A sleeve was broken in the barrel body, in which the striker (striker) directly performs shock work.

How to repair a Makita HR 2450 hammer drill if the shock mode is lost

As a result, the drummer stuck in the fragments of a collapsed sleeve.

The service center advised to replace the barrel completely. It turned out that the sleeve is pressed into the barrel at the factory and is not supplied separately. I had to buy a whole new barrel.

In this article, the author will tell you how to bring the puncher into working condition after this, in general, simple breakdown. If you have the skills to repair a power tool and the desire not to pay someone your hard earned money, then we take the tool and begin disassembling the car.

Instruments

It will take two ordinary flat head screwdrivers and one Phillips screwdriver. One of the flat screwdrivers should be thin and narrow, not more than 4 mm wide. You will also need a wire hook to remove the snap ring. It can be made from a bicycle spoke, the main thing is that the wire is rigid and does not easily bend. A rubber mallet or wooden mallet will also be needed.

Work process

Disassembly of the punch should begin with the removal of the protective rubber cap. anther. It is easily removed, just take it with your fingers and pull it off the barrel.

Then, having pressed on a plastic cover and having squeezed a spring of a lock of the SDS mechanism, we remove a lock ring with a screwdriver.

Makita Hr2470 rotary hammer Disassembly Assembly

Using a screwdriver, remove the stopper

The lid is removed from the barrel, and after it, again compressing the spring, we pull out the retainer ball along with the spring and figured washer.

SDS disassembly

Then the mode switch is disassembled. Under the cover holding the red button-lock, there is a special groove for the screwdriver. After inserting a screwdriver into this groove and prying off the lid slightly first from one edge and then from the second, carefully remove it. No significant efforts should be made here, the cover is still plastic and may break. The red button along with the spring is removed from the switch housing and it is moved to the left until it stops, a little further than the drilling mode. It is from this position that he is removed from the gearbox. For this operation, the switch should be slightly picked up with thin screwdrivers on both sides and removed together with the rubber O-ring.

Remove the punch mode switch

Now the gearbox is removed. Using a Phillips screwdriver, unscrew the four bolts connecting the box to the stator housing. Then, holding it with your hand, you need to lightly tap with a mallet on the end of the barrel so that the box comes off the gearbox.

Makita Hr2470 rotary hammer Disassembly Assembly

Remove the gearbox

Having removed the box, we take out the barrel from the gearbox. It is removed easily.

We take the barrel out of the gearbox

It is necessary to remove old grease with a rag, and rinse the barrel with gasoline or kerosene and wipe it dry.

Makita Hr2470 rotary hammer Disassembly Assembly

Makita Hr2470 rotary hammer Disassembly Assembly

So, as mentioned above, it was necessary to completely change the entire trunk. However, this item purchased at a service center was “a goal like a falcon”. That is, there was absolutely nothing on it and I had to rearrange all the details from the old barrel to a new "blank".

The most difficult operation was extracting the drummer from the barrel. There are special holes in the barrel body through which the snap ring is visible. This ring holds the striker in the saddle with rings and rubber dampers. Insert a thin screwdriver into the hole, slightly bend the ring. We do this first on the one hand, and then on the other. The stop must come out of the groove.

Using two screwdrivers, squeeze the stopper

Then, from the inside, we pull out the stopper from the wire with a homemade hook into the light of God.

Using a wire hook, pull out the stopper from the inside.

Next, we remove the striker with washers and rubber rings. It is necessary for assembly to remember or sketch the location of all rings and washers. If something goes wrong, photos and drawings from the article will help.

Now you need to remove the gear from the shaft. Having pressed on a washer and having squeezed a spring, with a thin screwdriver it is necessary to remove a lock ring from a flute. After removing it, remove the washer, spring and gear from the barrel.

Remove the gear

The gear wheel is put on a new barrel and engages with splines. Following it, a spring with a washer and a stopper are installed. Insert the circlip and lock the mechanism in the working position.

To do this, take the barrel in both hands and, resting it in the palm of your hand, use your fingers to compress the spring with force, while shifting the washer and stopper down. It is necessary to compress until the stopper engages in the groove.

Then, a striker with washers and rubber rings is installed inside the barrel in the order in which he understood. But first you need to pay attention to the condition of the drummer, his appearance.

If the striker has potholes and sinks after long work or because it has been scratched on a broken sleeve, then it should be sanded a little.

To do this, it is clamped into the drill chuck and processed with a fine-grained emery cloth. But if the bumps are too big, then the drummer will be easier to replace.

Assemble shock mechanism

It is necessary to lubricate the striker with special grease before installation and to continue to use lubricant during operation. When inserting a drill into the hammer, it is necessary to apply a little grease to its shank. This extends the life of the machine.

Having installed the striker mechanism in the barrel, we fix it with the circlip. We try using a screwdriver to move the drummer from both sides inside the barrel. He should walk easily in the canal and not jam.

Putting a new barrel

The assembled barrel is installed in the gear housing. Putting it on the cylinder with a piston, we engage it with the pinion gear and insert it into the housing. All parts should be well lubricated during assembly.

Install the barrel in the gearbox

Then we install the gearbox, after lubricating the needle bearing. With four bolts we draw the box to the stator housing and set the operating mode switch in place. To do this, set it to a position slightly to the left of the drilling mode.
We insert the red latch button with the spring and move the switch to the drilling mode. We click on the plastic cover and check the operation of the switch.

Makita Hr2470 rotary hammer Disassembly Assembly

Set the mode switch in place

We snap the cover of the punch mode switch

Then, in a final chord, the SDS mechanism is assembled. Having installed the mechanism spring, we put on a figured washer and insert the ball. Then we squeeze the mechanism spring with a plastic cover and insert the snap ring. Putting on a rubber boot is no longer difficult.

Having pressed a spring with a washer, we establish a ball a clamp

Install the SDS engine

We try a hammer drill under load. When the machine is operating, there should be no extraneous noise in the gearbox; the operating mode switch should easily move without jamming. In general, everything should work, as before the breakdown.

The author of this article hopes that it will help dear readers understand the repair of a hammer drill. Any breakdown can be simple if you find its cause. And then it all depends on your skill and diligence.

2 comments on How to repair a Makita HR 2450 hammer drill if the shock mode is lost

In the construction industry, the use of Makita rotary hammers is a must. The value of this technique is difficult to overestimate; it is indispensable when working with concrete, stone or brick. All extremely durable materials lend themselves to the onslaught of this versatile tool. In everyday life, Makita punchers are used for drilling holes in concrete and stone, for the manufacture of openings, recesses, cable channels in walls and in the floor.

Device

The Makita rotary hammer has dual motor protective insulation. Among the required structural elements is a trip clutch that prevents jerking when the drill is jammed, and electronic speed control. Corporate identity indicator. the instrument is equipped with a convenient suitcase for storing the instrument.

Most models are equipped with a dust extraction system and come with a soft rubber pad on the handle. The assortment includes Makita rotary hammers, both with a direct and vertical arrangement of the engine.

Principle of operation

It can perform 3 functions: drilling, drilling with impact, chiselling.

Makita hr2450 punch disassembly video

Depending on the number of functions performed, they are divided into three groups:

  • single-mode. perform drilling with impact, for example, Makita HR 2010.
  • dual-mode. drilling and drilling with impact, or drilling with impact and chiselling. The most popular hammer drill is. Makita HR 5001 C can drill with a blow or hammer.
  • three-mode. switch to any operating mode. For example, Makita HR 2450.
  • With SDS Plus, single, dual and tri-mode rotary hammers weighing up to 5 kg are available.
    Characteristic: power up to 850 W, impact force up to 5, 3 J, drilling diameter in concrete 18-30 mm.
  • With the SDS max cartridge two- and three-mode models in weight from 5, 9 kg are offered.
    Characteristic: power 1100-1500W, impact force 8, 3-17, 5J, maximum drill diameter 40-50mm, crowns 105-160mm.
    Advantages: high power and low vibration.

Shop "Makita. "Is the official dealer of the Japanese company and offers a wide range of Makita punchers with a manufacturer’s warranty and delivery. Professional managers who have completed training courses will help you choose the best model!

We offer Makita rotary hammers throughout Russia: Moscow, St. Petersburg, Yekaterinburg, Chelyabinsk, Nizhny Novgorod and many other cities with delivery and warranty, call! You can find out detailed information about the conditions and cost of delivery from our managers.

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