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.

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

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. Clean parts from old grease.

You get such a mountain of clean details.

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.

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.

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.

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

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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.

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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

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.

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.

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.

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.

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.

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.

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.

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.