Lubricant for a rotary hammer allows you to extend its service life and make its use more efficient. In order for the effect of a lubricant to bring the expected results, when choosing it, you should take into account not only the characteristics of the lubricant, but also the technical parameters of the device for which it is planned to be used. When choosing how to lubricate a hammer drill, you must also keep in mind the fact that different parts of such equipment require different types of lubricant.
Proper lubrication of the hammer drill gearbox
There is an opinion that the presence of lubricant on the moving elements of the hammer allows you to postpone its replacement for a long time. Meanwhile, this opinion is fundamentally wrong, and in order to change it, it is enough to get acquainted with the principle by which lubricants work.
Why do hammer drill elements need lubrication?
Lubricant, including that used for a hammer drill, is a viscous substance, the use of which is necessary to reduce the coefficient of friction between structural elements of a mechanical device moving relative to each other. Thus, lubricant only reduces friction, but does not eliminate it completely, so the lubricating composition is gradually saturated with wear products of rubbing parts - metal dust. As a result, not only does the viscosity of the lubricant change, but it itself becomes the cause of more intensive wear of the equipment.
It should be immediately noted that viscosity is the most important parameter that one must focus on when choosing a lubricant composition of a certain type.
Over time, the lubricant becomes dirty and loses its properties.
How to choose the right lubricant for a specific hammer drill model? First of all, you need to take into account the recommendations of the equipment manufacturer, who must indicate both the required type of lubricant and the frequency of its replacement. It is especially important to focus on such recommendations while the warranty period for the hammer drill has not yet expired. Otherwise, if the device breaks down, you will not be able to take advantage of the manufacturer’s warranty.
Many owners of rotary hammers, after the warranty period has expired, begin to use not branded compounds for lubrication, but their cheaper analogues - litol or grease. Of course, such lubricants are not capable of harming the structural elements of the hammer drill, but when using them, you should keep in mind that they should be replaced much more often.
What needs to be lubricated on a hammer drill?
Typically, maintenance of power tools is performed in the fall or spring, when a long vacation begins for the device or its preparation for the next season. To diagnose a power tool correctly, you must first figure out which parts on the hammer drill need to be lubricated. Structurally, a hammer drill is a complex device consisting of a number of the following elements:
- Body - the basis of the tool, inside which all the component parts are located
- An electric motor is the main unit that drives the tool’s executive element—the chuck. Motors in rotary hammers have a horizontal and vertical arrangement
- The piston system is an integral part of the gearbox, which is responsible for generating impact actions
- Chuck - has a special mechanism with quick fixation of working attachments
- A gearbox is a mechanism that transmits rotational movements from the electric motor shaft to the tool chuck. The design of the gearbox has a “drunk bearing”, which creates shock movements transmitted to the piston system
- A safety mechanism in the form of a clutch that limits the rotation of the chuck when the working attachment is jammed, thereby preventing overheating of the motor
- Working attachments are auxiliary elements that are installed in the design of the tool chuck
To imagine what a hammer drill consists of, below is a diagram of the structure of a power tool.
Knowing the design of the tool in question, you can figure out which parts of the hammer drill need lubrication. First of all, the rotary hammer requires lubrication of the gear unit, the main purpose of which is to regulate the rotation speed of the working nozzle fixed in the actuator (chuck). When the tool is operating, the gears experience high mechanical loads, which increases friction. Lack of lubricants leads to accelerated gear wear.
To increase the service life of the mechanism in question, you will need to regularly not only add lubricant to the gearbox design, but also first remove the remnants of old lubricants. Not many people know why obsolete hammer drill lubricant is removed. It must be removed in order to clean the metal particles and dust that are formed during the friction of the gears. If you do not clean out the old lubricant and apply new lubricants on top of it, then the effectiveness of such diagnostics will be zero.
The gearbox or transmission mechanism in the hammer drill is lubricated from the factory, but the lubricant must be changed every year with daily use of the unit. In addition to the gearbox, the tool also requires lubrication: the chuck and the seat of the installed attachment - the drill (tail part). From the factory, the cartridge (its internal part) is not lubricated, so the owner of the tool needs to worry about this if there is a desire to use the unit for a long time. In addition to the inside of the hammer drill chuck, the shank of the installed attachments also needs lubrication.
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The design of the unit also includes plain bearings. They are also subject to heavy loads, so to increase their service life, when carrying out diagnostic procedures, it is necessary to add lubricants to the bearing structure.
Gearbox lubrication
The hammer drill gearbox is the most complex component of the device in terms of design, so it requires special attention. Lubricating the rotary hammer gearbox is not so difficult, but self-assembly of a previously disassembled unit can cause serious difficulties. If the hammer drill is still under warranty, then with questions about lubrication of its gearbox, it is best to contact a specialized workshop that provides warranty service for such equipment.
A detailed diagram of your hammer drill will help you understand the mechanism and correctly assemble the tool
If the hammer drill you own is not covered by any warranty or the warranty period for your equipment has already expired, and the authorized service center is located far enough away, you can lubricate the gearbox yourself, observing maximum care and attention. For this you will need:
- a set of plumbing tools with which you will assemble and disassemble the hammer drill gearbox;
- clean rags;
- the composition itself for lubrication.
“Native” lubricant for the Makita P-08361 gearbox. Refilled during initial assembly of the tool and recommended for maintenance
It is better if the lubricant is a branded product specifically designed for equipment of a certain brand. So, it can be lubricant for a Makita hammer drill or lubricant for a Bosch hammer drill. If you don’t have a branded lubricant and you can’t buy it, you can use inexpensive domestic lubricants.
It is very important that you have instructions for the hammer drill that you are going to lubricate. Naturally, if you own a Makita or Bosch rotary hammer, this should be an instruction manual for the equipment of these particular brands.
All gearbox parts should be completely cleaned of old grease.
After carefully studying the instructions for the hammer drill, you can begin the procedure for lubricating its gearbox.
- Before disassembling, the hammer drill should be thoroughly cleaned of dust.
- When disassembling the gearbox, it is advisable to immediately remember how its structural elements are located in it. It should be borne in mind that it is not recommended to disassemble and lubricate the gearbox immediately after finishing using the hammer drill. This is explained by the fact that still hot gearbox parts, when exposed to a cold lubricant, may lose their physical characteristics.
- After all components of the gearbox are removed from its housing, they should be thoroughly washed with gasoline or spindle oil and wiped dry.
- The inside of the gear housing must also be washed, wiped (as far as possible) and allowed to dry completely.
- When disassembling the hammer drill gearbox, you can pay attention to the fact that there is no lubrication on some elements of its design. This only means that such parts do not require lubrication and there is no need to apply it to them.
- As mentioned above, it is better to use a branded lubricant for the gearbox of a drill or hammer drill, which has a number of advantages. In particular, branded lubricants retain their original characteristics much longer, so they can be used much less frequently. In addition, the proprietary lubricating composition has such an important quality as water resistance, so it effectively protects the metal parts of the hammer drill from moisture and, accordingly, from corrosion. As a good alternative to branded lubricants for the gearbox of a rotary hammer or drill, you can use Metabo oil, the cost of which is quite affordable.
- After lubricating all elements, the gearbox must be carefully reassembled, observing the reverse sequence.
Caring for a hammer drill includes not only lubricating its gearbox, but also applying a lubricating compound to the shank of the drill used.
Before performing this procedure, the tool shank should be thoroughly cleaned. After this, a special lubricant for hammer drills or regular lithol is usually used. In addition, if an open type chuck is installed on rotary hammers, it is advisable to first wipe and treat its seal, which will provide more reliable protection of the inside of the device from dust getting into it.
Hammer drill lubrication
Why do you lubricate a hammer drill?
Why any rotating instrument is lubricated is clear even to a housewife.
All moving parts come into contact with each other when moving. The friction force arising in this case, firstly, is directed in the opposite direction from the movement, slows down the operation of the tool, and secondly, heats up the rubbing parts. This in turn leads to their deformation and premature wear. When applying lubricant, the friction force decreases, while braking tends to zero, of course, without reaching it. The lubricant also removes heat from the heated part, thereby cooling it. This is the answer to the question - why use lubricant for a hammer drill?
If you take a fairly well-known power tool for construction and repair, like a hammer drill, you need to know that different lubricants are used for its moving parts. nodes
Lubrication points for the main parts of the hammer drill
It is not recommended to use the same lubricant for the hammer drill chuck and its gearbox, not to mention the fact that the working attachment must be lubricated with a special lubricant. But if the hammer drill has a ratcheting system, in this case the same lubricant is used for all its components.
Hammer drill lubricant has the form of a viscous substance. During operation, this substance is filled with metal waste from rubbing parts, which degrades the properties of the lubricant so much that it already causes deformation and wear of the latter. Therefore, the lubricant must be changed periodically.
In addition, in the gearbox, lubrication ensures that the gears slide relative to each other without obstacles. In the absence of lubrication or its depletion, the teeth wear out. Even the wear of one tooth leads to the need to replace the entire set of gears.
Many people use Litol 24 as an accessible and inexpensive lubricant, but it is not always suitable, it has to be changed frequently, during operation it becomes liquid and leaks, and is not good enough for the work of gear wheels. Therefore, in order for a hammer drill, especially a professional one, to work well, you need to choose a good lubricant for this type of tool.
What kind of lubricant is needed for a hammer drill?
In order to reduce the wear of internal parts in a hammer drill, and a good hammer drill costs good money, you need to choose the type of lubricant that can reduce this wear as much as possible.
The lubricant can be in liquid form, which is used in those hammer drills in which the gearbox is located in a completely closed housing. The oil is held in place using special oil seals and is poured through special holes, which are then tightly closed.
Before changing the oil, be sure to wash the internal parts with either gasoline or machine oil. This is the case if the body is non-separable. The amount of oil is indicated in the instructions for the tool.
The lubricant works great for cooling; the gears seem to be bathed in oil, lubricated on all sides. But there is one drawback. Since this is a closed space, when heated, which is inevitable when using these tools, the oil expands and increases the pressure in the housing.
Another type of lubrication is grease. Its use is more widespread.
It is much more convenient to use; due to its thickness, it adheres better to parts. In order to lubricate the rotary hammer gearbox with your own hands, you need to disassemble it in detail using the disassembly instructions. You can read about this in detail in the article “Lubricant for the rotary hammer gearbox.” In order to decide what kind of lubricant should be in the gearbox of your hammer drill, you must also take into account whether your tool is under warranty.
If the warranty period has not expired, we use the lubricant recommended by the manufacturer.
Companies such as Makita and Bosch produce their own lubricant that protects the tool from premature wear.
Which lubricant to choose for a Makita gearbox
These manufacturers also produce lubricants as liquid or grease. The price of lubricant from Makita is not very high, about 100 rubles for a 30 gram tube and can be used for other brands. According to reviews, very good quality.
After the warranty period for the tool expires, the owner decides what lubricant to lubricate his hammer drill with, look for his own option or use the lubricant recommended by the company.
I would like to return to Litol. Users who have a Chinese or Chinese-Russian tool note the fact that when using Litol in these tools, it increases the impact force of the hammer drill and at the same time reduces the noise of the tool. It’s just that when using it you need to lubricate it 1.5 times more often.
In addition, when heated, Litol liquefies and flows out faster. But this lubricant does not damage the tool, although in other models of the tool it can cause strong heating of the parts, as well as additional braking.
Hammer chuck lubricant
The hammer drill chuck requires the same care as the gearbox. Working in constant dust leads to a lot of dirt accumulating in the chuck, and the parts have difficulty turning. To avoid breakdowns, technical inspection with lubrication should be carried out not when the tool stops working, but much more often.
In order to lubricate the hammer drill chuck with your own hands, we choose the lubricant recommended by the manufacturer or from trusted manufacturers of the same type. Naturally, we disassemble the cartridge according to the instructions, wipe all parts dry and lubricate them with the chosen lubricant.
Disassembling the hammer drill chuck
It must be remembered that both a lack of lubrication and its excess do not have the best effect on the operation of the tool. Everything should be in moderation.
When lubricating, we lubricate those parts that need it and that must slide. Naturally, parts such as the transmission clutch do not need to be lubricated.
When purchasing lubricants, you need to know that lubricant for the tips of cutting tools, for example, drills and drills, is absolutely not suitable for lubricating components and vice versa.
Which lubricant is best to use for a hammer drill?
A good hammer drill costs quite a lot, and at the same time it is really unreasonable to skimp on lubricant. And a household impact drill with a hammer drill function requires good maintenance. Therefore, it is important to choose correctly what kind of lubricant you will put in your hammer drill.
Moreover, there is no need to do this more often than once every six months for household tools.
You can choose a lubricant from a hammer drill manufacturer, such as the traditional Makita, Bosch, Metabo, but also from AEG, Hitachi, Interskol, Zubr.
You can choose lubricant from lubricant manufacturers, such as the well-known lubricant from Xado, Ravenol and others. Some experts, having a small fleet of power tools and having tried some types, came to the conclusion that the lubricant that is used to lubricate components in Toyota cars is best suited. This is a multi-purpose lubricant 08887-00101 GREASE MP-G No. 2, which gives very good results specifically for the operation of rotary hammers. The question is how to buy it.
The table more clearly shows brands of lubricants from well-known companies.
| Company manufacturer | Suitable range | Purpose of the lubricant |
| Bosch | 3605430008, 1615430012 | hammer oils |
| 1615430005 | gear oil | |
| 1615430010, 1615430009 | for nozzle shanks | |
| 1615437512, 1615430014, 1615437511, 1615430015, 1615437509, 1615430019, 1615430016 | hammer drill lubricants in various packaging | |
| Makita | 181573-3 | for the Boers |
| 042024-0A | SDS+ tool gearboxes | |
| 183477-5, 042005-4A | SDS+ devices | |
| P-08361 | tool reducers SDS MAX | |
| Lubcon | Thermoplex ALN 250 EP | gear lube |
| Thermoplex ALN 1002 | for rotary hammers | |
| Turmogrease NM 4602/0 | universal composition |
Litol-24 can be used, but, as stated in the article, with reservations.
The composition of the lubricant must meet the following requirements:
- The lubricant should adhere well to the parts and a lubricating film should remain on them during operation.
- If you work with a tool in a damp room, when the tool is turned off and cools down, according to physical laws, a reduced pressure is established in the gearbox housing itself and, as a result, moist air enters inside. Therefore, the lubricant must be resistant to moisture and not form an emulsion.
- Heating the lubricant during operation and its subsequent dilution should not affect the quality of the lubricant and restore its properties after cooling.
- A property such as dripping must withstand high temperature.
- The lubricant should remove dust and abrasive from the contact area of the parts onto the housing walls.
- Since the parts in the housing are made from different materials, for example, steel, aluminum alloys and others, the lubricant must be suitable for all.
As a new product, you can pay attention to a lubricant such as “ULTRA”, which becomes liquid with a slight increase in temperature. At the same time, it has excellent adhesion.
ULTRA lubricant, which can be used in both sealed and non-sealed gearboxes.
When buying a lubricant, naturally, read the instructions very carefully, and sometimes the reviews of this product.
| Attention Bearing Buyers Dear customers, send your questions and requests for the purchase of bearings and components by email or call now: Delivery of bearings throughout the Russian Federation and abroad. Bearing catalog on the website |
Attention Bearing Buyers
Dear customers, send your questions and requests for the purchase of bearings and components by mail or call now: tel: +7 (495) 646 00 12 [email protected] Delivery of bearings in the Russian Federation and abroad. Bearing catalog on the website
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Causes of equipment overheating
Many home craftsmen have a question about how to use a hammer drill so that its gear housing does not overheat. First of all, you should find out the reason for the excessive heating. One of these reasons may be too much lubricant in the internal part of the gearbox, which also negatively affects the performance of the device.
The reason for the intense heating of the rotary hammer gearbox may also be that an insufficient amount of lubricant is supplied to its internal parts. This can happen in cases where the hammer drill is used for too long in the chiselling mode.
Through this hole in the hammer drill body, lubricant is periodically added during operation.
Another common reason for the device to overheat is that the holes through which cooling air flows to the hammer drill motor are clogged. In such cases, it is necessary to thoroughly clean the rotary hammer from dust and switch it to normal drilling mode for a while. When operating in this gentle mode for about half an hour, the temperature of the gearbox housing should decrease.
With proper care of the technical condition of the rotary hammer and compliance with all recommendations for its use, the gear housing should not overheat under any operating conditions.
Proper care of a drill with a hammer drill function
A hammer drill is a hybrid of two types of equipment used to create holes in various materials. Unlike a classic hammer drill, this drill has some design flaws, which makes its maintenance more difficult and not very convenient. Such disadvantages include, in particular:
- lack of a special container into which the lubricant is poured;
- the difficulty of servicing the cartridge due to the peculiarities of its structure.
The main care for a drill with hammer drill functions is that after each use, the drill of such equipment (including the tail section) must be thoroughly cleaned of drilling waste, and before inserting such a tool into the drill, a small amount should be applied to its shank lubricants (you can use regular grease). If the amount of lubricant on the shank is excessive, it will not harm the tool itself or the equipment being used, but it may negatively affect the appearance of the surface you are drilling, as excess lubricant will splash out of the rotating chuck.
Impact drill gearbox lubrication
As a rule, drills that have the functions of a hammer drill are purchased for household use, since their price is quite affordable, and they cope quite well with their functions when performing simple repair work around the house. Despite the fact that these power tools differ in the features mentioned above, caring for a hammer drill does not take much time and does not cause problems even for not very experienced users.
How to lubricate the chuck and drill bit of a hammer drill
The simplest action is to lubricate the tail part of the attachments installed in the structure of the power tool. The principle of applying lubricant to the shank of the drill and other attachments is as follows:
- To begin with, the shank of the nozzle must be wiped, removing dirt from the recesses, if any.
- Apply a suitable lubricant to the drill tail. To lubricate the working element, add the substance directly to the seat
- In order for the lubricant to reach all parts of the cartridge, it must be added until it begins to release from the mounting hole. To press it in, it is better to use a syringe with a thin tube.
- The substance on the drill shank should be thoroughly spread over the entire shank
At this point, the process of adding lubricants is considered complete, and it must be repeated as often as possible, which depends on the duration of operation of the unit.
Lubricant selection
Before dealing with the question of how to lubricate a hammer drill, you should become familiar with the means that can be used to carry out such a procedure. As a rule, the manufacturer indicates the type or brand of lubricant that is optimally suited to the equipment of a certain model. In any case, such instructions are in the instructions for hammer drills produced under reputable brands. If there are no such recommendations, you can ask the consultant at the store which lubricant is best for the hammer drill you are purchasing.
Service centers use branded lubricants that are difficult to find in the store, but can be ordered if you know the product code
A universal and relatively inexpensive lubricant that can be used for most modern models of rotary hammers is oil poured into diesel engines. Compositions based on graphite are actively and quite successfully used to lubricate hammer drills. Such compositions, in particular, are used to lubricate open-type worm gears.
Litol-24 is also actively used as an inexpensive lubricant for structural elements of perforating devices. Meanwhile, such a lubricating composition can cause overheating and braking of rubbing parts, in addition, its effect does not last long.
How to choose a lubricant for a hammer drill?
Most often, the instructions for each device indicate the necessary lubricant for the hammer drill gearbox.
For example, for Makita rotary hammers there is a special lubricant P08361. Other compounds are suitable for Bosch. Branded lubricants have the required water resistance and prevent corrosion. If there is no information on how to lubricate the hammer drill, then you can use some other means. But you need to find out from the store consultant whether they are suitable specifically for your hammer drill. One of the most popular products is diesel engine oil. also quite good and is often used for open worm gears. Litol 24 is also popular, but this lubricant also causes braking and additional heating. Yes, and it works for a relatively short time, unlike branded lubricant for hammer drills and for cordless tools, it is extremely undesirable.
