Black grease flows from the hammer drill

Why does the hammer drill overheat??

And now we lubricate all parts of the gearbox and assemble it in reverse order. Do not forget that an excessive amount can also affect the performance of the tool: the heating of the gearbox may increase significantly.

If the rotary hammer began to heat up more than usual during operation, this does not mean that there is a problem with lubrication. Most likely, you used the chiseling mode for a very long time and the lubricant simply did not pass to all parts of the hammer drill in the right amount.

Another reason may be clogged motor cooling holes. In this case, there is only one solution: to clean the tool from dust and transfer it temporarily to another operating mode. If the hammer drill works for half an hour like a regular electric drill, then the temperature of the case will drop significantly. The gearbox must have the same temperature in any mode of operation of the rock drill.

Why the drill is heating?

If the windings are very hot or hum and rattle are heard, then the reason for this may be wear or clogging of the bearings. If the bearings rotate hard, then they are washed with kerosene or WD-40. Grease is placed between the clips for high-speed units.

The tool may overheat due to prolonged use in difficult conditions. This often happens when using mortar mixing equipment. Also, the causes of overheating can be: poor contact in the electrical circuit, poor assembly, excessive lubrication.

The punch does not work

• A short circuit that caused the rotor or stator to burn out;
• Full wear of carbon electric brushes;
• The brush holders are loose and do not hold them;
• The lamellas on the collector are burnt out;
• The winding on the rotor or stator has broken;
• Battery breakage;
• The power cord is bent.

The winding can be made at home. If you are going to replace brushes, buy two at once, regardless of whether one or both are damaged. If a short circuit occurs, replace the burnt-out parts with serviceable ones. If the problem lies in the wire or battery, buy new ones and mount them in place of the old ones.

How to disassemble an electric motor

To disassemble the electric motor, it is necessary to disconnect the motor housing from the gearbox. They are fastened together with four screw screws. If they are unscrewed, the mechanical part is easily separated from the plastic cover. During disassembly, the motor rotor is removed from the guide sleeve, freeing access to the gearbox. Accordingly, it becomes possible to inspect the electrical parts of the engine.

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 sequentially measuring the resistance on the lamellas. In the event of a turn-to-turn short circuit, the armature must be replaced or repaired. The stator windings can be rewound independently at home using a special template.

The armature, as a rule, changes entirely, along with bearings and an air intake plate.

Is it possible to disassemble the rotary hammer reducer yourself?

The tool reducer requires a lot of attention. It is not so difficult to lubricate the gearbox parts, but before the expiration of the warranty period, it is undesirable to lubricate the hammer drill. You will be able to disassemble the gearbox in any case, but not everyone can assemble it. With the problem of lubricating the gearbox, it is advisable to contact the company service center or specialized workshops. This is a rather delicate job, therefore it is advisable to entrust it to professionals. But there are times when this nearest center is far from you, so you need to lubricate the gear yourself.

Pay attention to all details during disassembly.

Why the drill won’t turn on: the main reasons

First you need to examine the contacts of the power cord with the tool. To do this, disassemble the case, find contacts and call them with a multimeter. If this is not the problem, then check the switch. The contacts can oxidize, in which case they are cleaned with fine-grained emery paper. Also, one of the wires breaks quite often. You can determine this problem using a multimeter or resort to the simplest diagnostic method. connecting a light bulb and a battery to this circuit.

Also possible reasons are:

• malfunction of the connecting wires going from the switch to the motor brushes;
• damage to the brush assembly;
• more complex breakdown. damage to the armature or stator windings;
• clogging the gap between the armature and the brushes with a lump of dust.

The hammer drill does not twist under load

Surely, the load does not correspond to the permissible norm, and as a result, this drawback appears.

Rotary hammer device, assembly diagram and spare parts list

The tool consists of a single-phase motor and a rotor. A gear located on the armature shaft is responsible for the rotational movements. They have bearings, one where is “drunk”, only he transmits movements to the working parts.

Rules to be followed

During operation, the hammer drill heats up quickly. In order to preserve the performance of the tool for a long time, it is necessary to take a break for at least 10 minutes after 20-30 minutes of work.

During work, when rotating the tool idle, it is necessary to remove crumbs and dust, clean the punched hole in order to facilitate the work of the tool. When drilling holes with a large cross-section, they are first drilled with a thin drill, then with a medium one, making a hole in three steps. Long through passes must be drilled first with short nozzles, gradually replacing them with longer ones.

After work, it is necessary to put the punch and used nozzles in order. The instruments must be free of dust and stored dry in a container.

How to repair a hammer drill if it does not work. Finding out the prerequisites for tool breakages

The construction industry develops once a day and is supplemented with new tools. Already in the course of a couple of years, a perforator appeared in the top of power tools. In fact, this is an ordinary drill that is armed with an impact effect. Once a day, who is the 2nd worker facing defects.

The hammer drill cracks does not rotate Safety clutch at 2470 is out of order Slips

If there is no ability to get spare parts, then you can fix the safety clutch given in the video.

Aims and purposes of tool lubrication

Tool breakage is often caused by missing, deficient or inappropriate lubrication. Abrasive wear is reduced if all gaps and cavities are covered with a layer of antifreeze, and cleaning is carried out in a timely manner.

The type of gear lubricant is different from the shank formulation. Each manufacturer recommends using a specific hammer lubricant specified in the instructions at the desired frequency.

There are general guidelines for all rock drills. Gearboxes should receive oil of a liquid consistency, poured into a special hole. For all units, you can undoubtedly use Bosh and Makita grease intended for gearboxes, which is what they do in service centers.

Incorrectly selected or excessively filled with grease can lead to overheating of the gearbox.

To lubricate the shanks of the working equipment before inserting into the chuck, a thicker grease of the same manufacturers is used. In this case, the shank attachment point in the chuck and the firing pin are protected from working out. Filling all gaps with grease protects the unit from dust ingress.

It is necessary to lubricate the places indicated in the instructions. And it is certainly harmful to add lubricant to the clutch. In the event of a sudden detection of a lack of lubrication in the gearbox, you can use the domestic composition, Litol-24 Lux, but lubricant is not suitable for cordless rock drills, even temporarily.

Barrel hammer repair

This procedure is no different from repairing an ordinary rock drill. It should be borne in mind that the engine and shaft are placed vertically.

Bosch Hammer Drill Repair / Bosch GBH 2-26 DFR

Why is the perforator heated

In most cases, this is due to long operating times and enormous tool loads. The engine interacts with the working units, and as a result, overheating may appear. If it occurs, turn off the instrument, let it cool down. more than half an hour.

How to lubricate a punch

Different types of lubricants are used to lubricate the gearbox and drill chuck.

Drill lubricant

Everything is exactly the same here. Special greases for this purpose are called. for drills. And they are also usually produced by the same firms that make rotary hammers.

In the absence of a special lubricant, you can use graphite. But it does not remove heat from the shank so well, and this is important, since sometimes during long-term operation the shank sometimes becomes flattened, which is why it is difficult to extract it later.

Gearbox grease

A special lubricant is used here, which should be called so. gear lubricant. It can be as under the brands under which the perfs themselves are produced. Makita, Bosch, AEG, etc. But it can also be produced by a company that deals with this particular type of product, for example, Ravenol, Shell, Xado, etc.

Some people use simple lithol or salidol for these purposes. But in comparison with special lubricating products, they dry faster, and they do not eliminate friction as much as necessary.

Lubricate the gearbox

You will need to disassemble the tool body. Follow the points:

• Disassemble the cartridge. To do this, first remove the rubber ring. Then use a screwdriver to pry and remove the retaining ring. Next, the outer casing of the cartridge is carefully removed, and then the pressure ring, ball and spring are removed.
• Now unplug the mode switch. This is done differently depending on the model. At the end of the article, I gave a number of links to videos that describe how he is filmed on a particular model. If your unit is not among them, then you can look at any similar one to understand the principle. And then, I think, it will not be difficult for you to disconnect it at your own.
• Free the collector from the brushes. To do this, unscrew the rear housing cover and remove the brushes.
• Unscrew the self-tapping screws that pull the body longitudinally and separate it.
• Take out the gearbox together with the motor armature.

Now thoroughly rinse the gearbox itself, as well as the inside of its housing. Flushing can be carried out, for example, with gasoline.

After that, the most critical parts are first smeared. And then the entire gearbox is completely enveloped in grease.

Clean and Service Overheating HITACHI Drill

Well, it remains to collect everything in the reverse order.

How and with what to lubricate the gearbox and the chuck of the perforator?

Welcome to my site! This article will focus on lubricating a rock drill. The operation of this tool requires more than simple care. Be sure to periodically lubricate the gearbox and chuck.

In this case, the gearbox, of course, comes already lubricated from the factory. But over time, the lubricant leaks somewhere, dries somewhere. In addition, it is only intended to reduce friction, not to eliminate it. Therefore, one way or another, and the parts still rub against each other, due to which fine metal dust is gradually formed, which remains in the lubricant.

As a result of this mixing of metal and lubricant, the properties of the latter are gradually lost and wear of parts is accelerated.

The cartridge is dry from the factory. Here, in fact, not the cartridge itself is completely smeared, but only that place of it that comes into contact with the drill, since it is in it that strong friction occurs, without reducing which you can damage both the cartridge itself and the drill shank.

So, below we will consider how and how to lubricate these elements. An SDS rotary hammer with a horizontal engine will be considered, since it is it that is used by home craftsmen in the overwhelming majority of cases, and the article is mainly written for them.

Lubricate the chuck and drill shank

This operation is very simple, so its description will be rather short.

We just take the drilling lubricant and add it directly to the chuck. Another option involves applying it to the shank and then installing it into the socket of the cartridge. But no one forbids combining these two methods for reliability.

It is necessary to ensure that the grease is constantly present and, as necessary, add new one. If this procedure is neglected, the shank will overheat, which will either tear it off the rest of the drill or flatten it. So don’t be lazy and add.

That’s all there is to know about the chuck and shank.

As promised, I attach at the end of the link to the video with detaching the switch:

This is all the information I have on the lubrication of the hammer drill. I hope it was clear and accessible. On this I say goodbye. until we meet again!

Features of the choice of oil

One of the main parameters that is taken into account when buying a lubricant is the viscosity of the oil. High quality products are usually expensive, but in this case, you do not need to save. The hammer drill is an expensive tool, so you should constantly take care of its performance. Typically, the types of grease are listed in the instructions, but if information is not available, then you can always consult the manager of the service center or the outlet where the device was purchased. Experts will select the optimal composition for the perforator.

There are also universal compounds that can be used to lubricate different types of drills. In recent years, graphite lubricants have been very popular because of their good viscosity and high quality level.

Experienced specialists confirm that many branded mixtures are of much lower quality than mixtures produced on the basis of graphite. In addition, they have a fairly affordable cost, so many people confidently make a choice in their favor.

For perforators, you should take substances such as grease and lithol. Litol. 25 is a high quality durable material that has a low cost. Therefore, it is very popular with power tool owners.

Do not forget that such mixtures can cause slight braking of rotating structures, and can also significantly increase the heating of the tool during operation.

If we talk about specialized lubricants, then it should be noted that to lubricate various parts, you need to use oils that are suitable for them. For example, oils that are used to treat a gearbox are unsuitable for lubricating drills.

And in order to lubricate the gearbox, a more liquid composition is required, which must completely cover the contacting parts, filling the free cavities. But if there are plastic parts in the gearbox, then the lubricant can only be silicone.

The transmission mechanism can also be lubricated with plastic compounds, however, not every technique can function without interruptions when using funds with a similar consistency.

Thicker mixes are suitable to reduce wear on the tail nozzles. Usually it is indicated on the packaging that they are intended for handling drills.

If you do not have the necessary funds at hand, you can stop at its graphite counterpart, although it removes heat much worse than specialized oil.

For cartridges, silicone grease options can be used. Lubricants are branded, which are manufactured by manufacturers of electrical tools, for example, Hitachi or Metabo, as well as AEG, Bosch or Interskol. They can also be produced by enterprises specializing in the production of lubricant mixtures.

The most popular brands are:

• Bosch. produces oils for gear lubrication and tail nozzles;
• Makita. purchased for drills;
• Lubcon Thermoplex. manufactures products for gearboxes;
• Turmogrease. multipurpose greases;

• Nanotech. used for shanks;
• Interskol. optimal for drilling drills;
• PRORAB. is the composition used for the treatment of the tailpieces’ seats;
• Kress. used for lubrication greasing drills.

Most popular among users are Bosch and Makita.

What it is?

Lubricant is a viscous substance that reduces the coefficient of friction between tool parts. The work of the hammer drill is associated with a huge number of different rotational movements, which increases the degree of wear of structural elements.

When drilling, a lot of dust is emitted, which significantly impairs the operation of the device, which is why it requires periodic lubrication.

What parts need lubrication?

According to their physicists. technical parameters grease for drills, pistons, drills, as well as gear and other elements is almost the same as greases of all other types. This is a rather viscous substance with an oily structure, it is used to reduce the frictional force of rotating parts, thereby reducing the wear of the operating mechanisms.

Lubrication only reduces the wear of mechanisms, but does not eliminate it. But it is quite possible to significantly extend the period of their operation.

Over time, the lubricant is impregnated with dust, which is formed during drilling, grinding and crushing. this leads to a change in the degree of its viscosity. In this situation, friction, on the contrary, increases and the rate of wear increases, so the lubricant should be renewed from time to time. In order for the perforator to serve longer, you should clearly understand which parts can be lubricated and how often it should be done.

The device has a complex structure, including several complex units:

• body with anti-vibration protection;
• horizontally or vertically located electric motor;
• piston system;
• cartridge;
• a gearbox in the form of a body. cylindrical bevel and worm gears are placed in it;
• clutch required to stop rotation;
• working nozzle (drill, as well as a chisel, lance or blade).

Almost all hammer drill mechanisms are subject to lubrication.

• Reducer. This is the mechanism that is responsible for the speed of rotation of the main working nozzle. It protects the parts located inside from dust and dirt, therefore it is equipped with a protective coating. During the operation of the tool, its parts experience enormous loads due to the constantly increasing friction between them, which, in turn, leads to rather rapid wear.

In most devices, the gearbox is initially biased, however, inexpensive products are often lubricated with materials of very dubious quality, so they must be lubricated again immediately after purchase.

• Cartridge. In addition to the gearbox, you need to lubricate the cartridge, as well as the landing site of the replaceable nozzles. The cartridge is initially dry, therefore, after purchase, it should be lubricated in the area in contact with the tail of the nozzle. this is where the maximum friction occurs. If it is not reduced in a timely manner, then the degree of wear increases sharply, which quickly leads to its damage.

• Tail nozzle. This part wears out under the influence of impact forces, which, when heated, increase its abrasion. The shanks must be lubricated every time they are installed, but before that you need to wipe off the dust with a napkin and remove all dirt.

If the device is operating in intensive mode, the amount of grease on the working nozzle should be visually controlled.

Depending on the features of operation, perforators can work in different modes. some use the tool daily, others only from time to time, so there is no clear answer about the frequency of lubrication of the working parts of the tool. Usually, the operating instructions clearly describe the procedure for lubricating parts.

It must be remembered that structural parts that are not listed in it do not need lubrication.

When deciding to change the lubricant, they are guided by the moments:

• the frequency of use of the punch;
• tips outlined in the user manual;
• warranty period.

If the hammer drill is still under warranty service, then only certified lubricants, which are listed by the tool manufacturer, should be used in the work. Otherwise, if the tool fails, the service center has the right to refuse to fulfill all warranty obligations.

How to properly lubricate parts?

When it comes to lubricating a rotary hammer at home, as a rule, they mean changing the lubricant on its individual parts by yourself. First of all, the gearbox should be lubricated. this mechanism is quite easy to disassemble, but it has a complex structure, so all actions must be carried out in a strictly defined order.

First you need to prepare the necessary materials:

• dry clean cloth. rags;
• locksmith tools that are needed to assemble the gearbox;
• the lubricant itself.

In most cases, world-renowned manufacturers such as Bosch and Makita, in the operating manual, indicate the entire procedure for disassembling and assembling devices and issue important recommendations. The owners of rotary hammers, who are faced with such work for the first time, following these tips, can master all the manipulations quite quickly, spending a minimum of effort.

But if such a guide is not at hand, then you should work according to a certain algorithm.

• The tool must be removed from dust and dirt.
• When disassembling and then assembling the drill and hammer drill, you need to remember as accurately as possible the order of arrangement of all functional parts so as not to confuse them during disassembly. Better to use video recording.
• All work related to the lubrication of parts is performed only after a certain time after the cessation of the drill. It must cool down, otherwise the cooled grease may cause the power tool to malfunction if it comes into contact with hot spots.
• After taking out all the basic parts, including the gearbox, they are washed with spindle oil or gasoline, and then thoroughly dried from excess moisture. Pay particular attention to the gearbox.
• Every detail of the device should be inspected as carefully as possible. In some areas, there is no lubrication, which means that you do not need to apply a new composition to this place.
• After applying the composition, the gearbox is carefully assembled in the reverse order. If this is done correctly, then the hammer drill can be immediately used in work.

In addition to the gearbox, the drill should also be lubricated. In this case, the tail part of the mechanism, as in the first case, is washed with gasoline, cleaned and dried, and only after that it is carefully coated with specialized oils.

At the same time, it makes sense to handle the cartridge oil seal with your own hands, this will significantly increase its service life, and also protect against dust penetration. However, it should not be overlooked that it is lubricated only when a system with an open type chuck is mounted on the perforator. If the system is closed, there is no need for lubrication.

Rotary hammer lubricants: what it is, how to choose and use?

• What it is?
• What parts need lubrication?
• Features of the choice of oil
• How to properly lubricate parts?
• Useful Tips

Rotary hammers require careful maintenance during use. For their long-term operation, different types of lubricants are used. Compositions can be mineral, semi-synthetic, and synthetic. Mineral minerals are made from petroleum products, therefore they quickly lose their operational characteristics, and they have to be changed quite often.

It is very important to choose a composition that will be suitable for the selected type of hammer drill.

Useful Tips

Owners of drills and hammer drills often wonder about the frequency of lubrication. Determining the time frame is problematic, but on average, the optimal period for an oil change is considered to be a period of 12 months if the tool is operated at medium intensity.

Lubrication of many modern instruments is greatly simplified through the introduction of a number of useful improvements. For example, popular brands often make special holes in the technique, into which the lubricating composition is simply poured, and the need for its disassembly and subsequent assembly disappears.

Usually, such systems are designed very competently. in addition to the holes for filling the oil, there are also outlets through which the damaged grease is drained.

There are special marks on the surface of the device that directly indicate how much lubricant is needed to maintain the functional operation of the power tool.

The only thing that will be required in this case is to blow the hole as intensively as possible before use. To do this, you can use a compressor, and then flush the hole with gasoline.

Lack of lubricant is often the main cause of serious rock drill malfunctions. In the crushing mode, the lubricant is wasted in a significant amount, and if there is too little lubricant on the gearbox or drill, this often causes overheating of the entire device.

At the same time, there is no need to be zealous. if too much oily composition is applied, then the rotational speed of the drill will be reduced, and this also deteriorates the operational characteristics of the tool as a whole. In addition, excess grease will end up on work surfaces that are difficult to clean.

For information on how to properly lubricate the punch, see the next video.