How to choose a lubricant for an angle grinder gearbox

Characteristics and features of lubricants for angle grinders

When servicing any hand tool with moving parts, a lubricant is used that has the following characteristics and features:

• It should not contain solid particles that could cause chipping of the moving parts of the mechanism.
• The temperature at which the lubricant becomes liquid must be more than 120 degrees.
• The oil should not absorb moisture and should form a durable film that protects parts from corrosion.
• And also, most importantly, the oil must be of such viscosity that it is able to adhere to moving parts.

Makita grease

Bosch lubricant

Mobil lubricant

The consistency or viscosity of lubricants is classified according to the NLGI (National Lubricating Grease Institute), and in certain cases it is necessary to use oil of a certain thickness. The viscosity of the oil is selected depending on the speed of the gearbox; the higher it is, the thinner the oil should be. So, depending on the tool, the viscosity is selected:

• Drills, hammer drills, jigsaws, where the gearbox has a low rotation speed. Lubricant with index NLGI-2 which is soft.
• Lightweight rotary hammers and impact drills. Class NLGI-1, very soft consistency.
• Angle grinders, circular saws, brush cutters. Class NLGI-0, semi-liquid consistency.
• Heavy hammer drills, jackhammers. Class NLGI-00, consistency is liquid.

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In modern construction it is very difficult to do without reliable and high-quality tools. One of the necessary electrical appliances is a hammer drill. It is with its help that you can drill holes in almost any surface or make a channel for wires; this tool also replaces a drill and jackhammer with almost no problems. Such a replacement is possible due to the fact that this equipment produces both rotational and longitudinal-axial movements. The article will discuss which lubricant to lubricate a hammer drill in order to maximize its service life.

Content:

The very first hammer drill appeared in 1851; it was then used in the mining industry, was manual and did not have such rich functionality. But after just over 150 years, it has become one of the necessary tools for the home craftsman and professional builder. The design of the hammer drill is quite complex and in order to preserve it for a long time and not subject to premature repair, it is recommended to carefully monitor its condition. First of all, it is necessary to lubricate certain parts. This process will help to significantly extend the life of the electric assistant.

To understand why a hammer drill requires lubrication, you should get to know its structure and operating principle in more detail.

Main structural elements of a rotary hammer

In order for the hammer drill to perform its direct functions, it is necessary to apply a certain force towards the surface being processed. It is possible to obtain such an impulse thanks to a pneumatic or electromagnetic mechanism. The power of the tool depends on the impact energy and the power of the electric motor. That is, the higher the values ​​in joules and watts, the more powerful the tool.

The main elements of a rotary hammer with an electromagnetic type of impact include:

• electromagnetic coil (usually 2 pieces);
• core;
• Boer.

And the elements of a tool with a pneumatic type of action include:

• piston and cylinder;
• striker;
• drill (or other attachment).

Rotary hammers with pneumatic impact are more common today than those with electromagnetic impact. There are several options for their execution, the main two, which differ from each other in that the first uses a swinging bearing (the so-called “drunk”), and the second uses a crank mechanism. Tools with the first option are lightweight and compact, while with the second option, as a rule, they are medium or heavy in weight.

Also, the tools are usually equipped with:

• chuck - necessary for securing the nozzle, there are several types: SDS Plus (installed in light tools) and SDS max (for medium and heavy tools), the first type has the ability to install a drill with shanks with a diameter of 1 cm, with the second type the shank diameter is 1 .8 cm, also SDS Plus has three operating modes (drilling, drilling, impact), and SDS max only two (drilling and impact). It is also possible to install a traditional jaw-type chuck (a hollow cylinder with an adjusting ring and metal cams that hold the nozzle);

• chuck replacement system - quick change from one type of chuck (SDS) to another (cam);
• reverse – changes the rotation of the drill; it can be of brush or electronic type;
• gearbox - is a single housing (crankcase) in which various gears (bevel, cylindrical, worm) are located, this arrangement of parts allows you to protect the main mechanism from damage and dirt and dust, the main function of the element is to change the speed of rotation of the shafts;
• vibration protection - there are passive or active (labeled AVS, most heavy hammer drills are equipped with) type, they dampen vibration from impacts, that is, they reduce it, but this effect cannot be completely removed, the active anti-vibration system has a shock-absorbing device - a counterweight with a spring, and the passive system consists of rubber pads and a rubberized handle, that is, it protects a little worse and is installed only on light household tools;
• various indicators;
• speed controller;
• safety clutch - necessary to stop the rotation of the cartridge in cases where the nozzle jams during operation, there are two types: spring-cam (consists of coupling halves with teeth and a spring) and friction (consists of disks);
• electronic immobilizer - to stop the hammer drill in emergency situations, for example, in cases of power surge, to avoid problems with the tool and maintain its performance;
• motor - there are two types: transverse (vertical arrangement, has a larger area for cooling and is considered more protected from dust generated during operation, as a rule, used in cases where long-term drilling is necessary without interruptions) and longitudinal (horizontal arrangement helps to make the tool more balanced, that is, increases its ergonomics, and also more compact).

Having understood the structure of the hammer drill, you should know what kind of care the tool needs.

How to lubricate a hammer drill

The main purpose of a hammer drill is to drill, chisel and drill various surfaces. As a rule, most materials that this tool works with have a tendency to become dusty. Small particles falling on internal parts clog the device. It should be taken into account that the elements are in motion, during which they come into contact with each other, and, therefore, their abrasion may begin. To maintain the functionality of the tool, it is necessary to regularly clean and lubricate it. Only with such care is it possible to maximize the service life, avoid early breakdowns and expensive repairs.

Important: lubricant has several main types. One type is used for the gearbox and a completely different type is needed for drills or drill bits. Each device has detailed operating instructions, which specify clear lubrication intervals. These are the recommendations that should be followed.

There are general rules for all types of hammer drills.

How to lubricate a hammer drill gearbox

• Thus, to lubricate the gearbox, it is most often recommended to use compounds in the form of liquid oil, which is poured in a certain dose into the tool body (into holes specially designed for this purpose). This oil fills the gear housing and is reliably isolated inside using caps installed on the holes or bolts. During operation, the parts are evenly coated with this product. Makita is considered the most popular manufacturer of oil for lubricating gearboxes.

• As an example, we can name two popular types of products from these manufacturers, which are used during initial assembly or during tool repair:

• lubricant “Makita P-08361” 30 ml, approximate cost 100 rubles;
• oil “Bosch 1615430005” 45 ml, price about 300 rubles.

Advice: there are also plastic compositions for gearboxes (in the form of a cream), but it is worth considering that not all models of tools can work stably with products of this consistency. Every owner of a rotary hammer should have a gear lubricant. But if the hammer drill is under warranty, then it is best to carry out such an operation using the services of service centers, especially if there are no special holes (that is, if it is necessary to disassemble the tool).

How to lubricate a hammer drill

• Lubricant for rotary hammer drills is used to reduce wear on the bits, and also extends the service life of the rotary hammer (including by reducing the amount of dust penetrating inside). Lubricant is applied before each insertion of the drill into the chuck; for this purpose, the grooves of the nozzle are lubricated with a small amount of the product. Before performing this operation for the first time, you need to carefully read the instructions for the instrument. This is necessary in order to understand how to properly disassemble/assemble a hammer drill without damaging its elements and achieve proper operation.
• The amount of lubricant and its quality determine how the power tool will function. If the ratio is selected incorrectly, the device may overheat and even fail. Therefore, before using this or that lubricant, it is worth checking whether this manufacturer and type of product are included in the recommendations in the operating instructions for the hammer drill. The most common compositions for lubricating drills are also produced by the Bosch and Makita brands, only the products have a thicker consistency.
• When starting to lubricate, you need to rinse and blow out the tool, wipe it dry and only then apply a new layer of protective agent. Those parts that do not need to slide should not be lubricated, as this can only damage the hammer drill. Such elements include, for example, a transmission coupling.

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How to lubricate a hammer drill chuck

• The composition should also be applied to replaceable drill bits in the form of a cartridge. The amount of the substance must be as indicated in the instructions. Too much or too little of it can cause the instrument to fail.

• It is recommended to lubricate the shanks before each installation; after removing the nozzle, it must be wiped from dust and waste oil.

Choosing the type of lubricant is not a problem; the instructions have clear recommendations; if they are not available, then you can choose almost any product from trusted manufacturers.

Which lubricant to buy for a hammer drill

Lubricant for Makita rotary hammer

A Japanese corporation that has been producing various construction tools since 1915. The very first owner of the company was Masaburo Makita, after whom the company still bears its name. Today, the corporation is one of the leading manufacturers of power tools (350 types) and accessories (4,500 varieties) for them.

How to disassemble and lubricate a Makita hammer drill video

Product range (lubricants):

• “042005-4A” – for SDS+ rotary hammers (packaging 16 kg);
• “042024-0A” – for the gearbox of SDS+ rotary hammers (packaging 2.5 kg);
• “P-08361” – for gearboxes of rotary hammers SDS MAX (packaging 30 grams);
• “183477-5” – for SDS+ hammer drills (packaging 30 grams);
• “181573-3” – lubricant for drills (packaging 100 ml).

Bosch rotary hammer lubricant

• The founder of the German concern was Robert Bosch, an engineer and businessman, who in 1886 opened a small company for the sale and manufacture of electrical equipment. And despite the fact that initially the staff consisted of only one mechanic and one electrical engineer, the company was able to reach unprecedented heights.
• Today it is a leading supplier of various categories of construction and consumer goods, including power tools. The company's subsidiaries are located all over the world, including the Russian Federation. And, perhaps, every city in Russia has an official service center, and since 2007, a plant for the production of equipment was opened in the city of Engels.
• Many technologies that are considered innovative today have been successfully tested in this particular area for many years - this is a reliable and ergonomic technology with the most advanced achievements. The corporation's policy is not to sell as many instruments as possible, but to ensure that each purchased device lasts as long as possible. That is why they began to produce specially developed branded products for the care of power tools, including rotary hammers.

Product range:

• “1615430009”, “1615430010” – lubricants for inserted instrument tips (30 ml packaging);
• “1615430012” – oil for rotary hammers (packaging 1 l);
• “1615430014” – lubricant in tubes for rotary hammers (45 ml packaging);
• “1615430015” – lubricant in tubes for hammer drills (packaging 225 ml);
• “1615430016” – lubricant for hammer drills (packaging 1 kg);
• “1615430019” – lubricant for rotary hammers (packaging 1 l);
• “1615437509”, “1615437511”, “1615437512” – lubricants for hammer drills, complete with a sealing frame (50 ml packaging);
• “3605430008” – hydraulic oil (packaging 1 l).

Lubricant for rotary hammer Lubcon

• A German company founded in 1980 in Frankfurt. Produces various types of synthetic lubricants for power tools. Products are supplied all over the world, including Russia. The company positions its products as environmentally friendly formulations. Only components that meet the highest requirements are used for their development.
• Lubricants are particularly thermally stable, they do not oxidize and excellently prevent friction even under maximum load. These are waterproof compounds that guarantee long service life for most power tools.

Product range for power tools:

• “Lubcon Thermoplex ALN 250 EP” – lubricant for gearboxes;
• “Lubcon Thermoplex ALN 1002” – lubricant for hammer drills;
• "Lubcon Turmogrease NM 4602/0" is a universal lubricant composition.

Lubricant for hammer drill NANOTEK

The Russian company produces synthetic, semi-synthetic, mineral, semi-liquid and plastic lubricating compounds. Products under this brand first appeared on the Russian market in 2004, and since then Nanonet has been annually increasing the range of its products. Lubricants and oils meet the high demands of modern times.

Product range:

• MetalPlak Electra lubricant is a plastic mass for processing drills (packaging 125 grams).

Metabo rotary hammer lubricant

• The company first began its activities in 1924, its founders are considered to be Albrecht Schnitzler and Julius Klos. The original plans of the company's founders were to produce instruments that would meet the growing technological needs of our time. Initially, the instrument was hand-operated, and only in the 30s of the 20th century did they begin to manufacture electric devices.
• The company tries to make products that are durable. And for these purposes, they create a whole line of care products for power tools, including lubricants for rotary hammers. Most often these are plastic products intended for drill shanks.

Product range:

• “Metabo 631800000” – Lubricant for drills (pack of 100 ml).

Lubricant for hammer drill Zubr

The company is a Russian manufacturer of various materials and tools that have proven themselves well in both the domestic and foreign markets. The products have an affordable price and good quality; the product range is constantly updated with new product categories. All products are tested in the company's laboratories and only after successful completion are delivered to the design bureau. Finished products must undergo quality control and then go on sale.

Read also: How to test a car battery with a multimeter

Product range

• “Zubr-Expert 60” – lubricant for drills (packaging 60 g);
• “Zubr-Expert 125” – lubricant for drills (packaging 125 g);
• “Zubr ZSB” – lubricant for drills (packaging 125 g).

Lubricant for rotary hammer Interskol

The Russian enterprise is today one of the leading domestic manufacturers of power tools. The company has extensive experience in the development and production of various products and has its own design and testing bureau. Factories are located in Russia and Spain, and the products themselves are supplied to many European countries.

How to disassemble and lubricate an interskol hammer drill video

Product range

• “Interskol v9000327” – lubricant for drills (packaging 125 g);
• “Interskol v9001698” – lubricant for drills (packaging 60 g).

Lubricant for rotary hammer PRORAB

Russian company for the production of power tools, accessories and related products, established in 2005. Today it has more than 1000 names of its products. The manufacturer is distinguished by high-quality products at an affordable price.

Product range

• “PRORAB 0125” is a specialized lubricant for drills, plastic consistency (packaging 125 g).

Lubricant for rotary hammer Kress Elektrowerkzeuge

The German company, which produces various pneumatic and electric tools, was founded in 1928 and has established itself as a reliable manufacturer. All tools have a company warranty of up to two years, and in some cases up to 10 years (subject to service in specialized service centers).

Product range

• “Kress 98035301” – lubricant for drills (pack of 50 ml).

Litol

• Sometimes a lubricant such as “Litol-24” is used in household use. This is petroleum oil that is thickened with a special composition. The product is characterized by chemical and mechanical stability, heat resistance and frost resistance (does not lose its properties at temperatures from +120 to -40 degrees), and also has water-repellent qualities. Such products are manufactured in accordance with GOST and have several modifications.
• A modern type of product is a product called “Litol-24 LUX” - it is distinguished by a light yellow color and excellent water resistance, it comes in various packaging packages of 25, 10, 2, 0.8 kg, the approximate cost for 1 kg is about 100 rubles. (the larger the package, the lower the price per kilogram).

• This product is used for gear and articulated gears and for all types of bearings, as well as for lubricating equipment in power tools. Experts recommend treating such a composition with caution, since the lubricant can cause additional heating of the hammer drill. In addition, it is not characterized by long and stable operation; it is also better to refrain from using it in battery units.

Branded lubricants, which are indicated in the instructions for the tool, will be more useful than using Litol, since they are characterized by better water resistance, and therefore more reliably protect the product from corrosion.

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.

Lubricant for angle grinder gearbox

Almost all global tool manufacturers require the use of their recommended “own” lubricant, sold under their brand. In principle this is correct. The lubricant used for the angle grinder gearbox, in this case, is tested at the manufacturer; it guarantees long-term and proper operation of the angle grinder. However, there are some drawbacks, which include the high price of lubricants from these brands.

Lubricant for open angle grinder gearbox

In addition to original oils, there are many lubricants on the market produced by third-party manufacturers, so the question of what exactly to lubricate the gearbox of an angle grinder is not an urgent one.

Products from Haskey, Castrol, Liqui Moly and others have proven themselves to be good for adding to an angle grinder gearbox.

Russian manufacturers also keep up with foreign ones and offer their products. Thus, the lubrication of bevel gear angle grinders from . Of course, such gear lubricant is not original and recommended by the manufacturer, so if it is used, subsequent warranty repairs may simply be refused.

Features of oil selection

One of the main parameters that is taken into account when purchasing a lubricant composition is the viscosity of the oil. Quality products are usually expensive, but in this case there is no need to skimp. A hammer drill is an expensive tool, so its performance should be constantly taken care of. As a rule, the types of oil are indicated in the instructions, but if the information is not available, you can always consult the manager of the service center or retail outlet where you purchased the device. Specialists will select the optimal composition for the hammer drill.

There are universal connections that can be used to lubricate various types of drills. In recent years, graphite lubricants have become very popular. because they have good viscosity and high quality.

Experienced experts confirm this; many proprietary mixtures are of much lower quality than graphite-based mixtures . In addition, they are quite affordable, so many people confidently make their choice.

Substances such as solid oil and lithol should be used for rotary hammers . Litol. 25. It is a high quality durable material with low cost. Therefore, it is very popular among power tool owners.

Please be aware that such mixtures may cause slight drag on rotating structures and may also significantly increase the heat generated by the tool during operation.

And you need more oil to lubricate the transmission , which should completely cover the contact parts, filling the free cavities. And here , if there are plastic parts in the box, the oil can only be silicone.

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The transmission can also be lubricated with plastic joints, but not all equipment can operate smoothly when using products with a similar structure.

Thick mixtures are suitable for reducing tail tip wear. Usually the packaging indicates that they are intended for drilling.

Silicone lubricants can be used for cartridges . Lubricants are branded lubricants produced by power tool manufacturers such as Hitachi or Metabo, as well as AEG, Bosch or Interskol. They can also be produced by companies specializing in the production of lubricants.

Most popular brands:

• Bosch . produces lubrication oils using gearbox and tail nozzles;
• Makita . purchased for exercises;
• Thermoplex Lubon . produce gearbox products;
• Displacement . universal lubricants;

• Nanotechnology . Used for cuttings;
• Interskol . optimal for drilling;
• Foreman . Is a composition used for the treatment of seated parts of the tail;
• Zherukha . used to lubricate drilling oil.

The correct process for packing lubricant into angle grinders

After the choice of lubricant for the angle grinder has been made, they proceed directly to servicing the tool. The correct maintenance process for an angle grinder consists of several steps. First you need to open the gearbox, then remove the old lubricant, apply a new one, and check the correct application. Removing the old lubricant is necessary for the reason that when mixed with the new one, it will not allow it to work correctly and the entire maintenance procedure will not bring any results.

Proper filling of lubricant in angle grinders

What is perforation oil and why do you need it?

A lubricant is a viscous substance designed to minimize the coefficient of friction between tool parts. Reduce rather than remove completely. This means there is almost always friction between parts , and some of the small particles are separated from the tool and into the oil itself. After some time, this lubricant, impregnated with metal dust, no longer performs its direct function. At first, its viscosity simply changes, and then the oil itself causes rapid wear of tool parts. Viscosity is considered the main parameter that you should pay attention to when purchasing it.

The manufacturer must indicate in the technical documentation all the characteristics of the tool and the lubricant used. Much attention should be paid to the maintenance frequency, which indicates how long before you need to change the oil.

For a hammer that has a quality certificate, you should always use only branded lubricants , otherwise, if the tool fails, you will lose the right to warranty service. After the warranty period has expired, it is also better to use the oil recommended by the manufacturer, but at this time most often the user uses cheaper domestic analogues. Litol or solid oil will not harm your instrument in any way. But do not forget that lithol is produced much faster, that is, it needs to be replaced much more often.

When to change the grease in an angle grinder

The frequency of replacing the lubricant depends on how often and under what loads the tool is used. As a rule, this period is approximately a year. In case of intensive use with frequent overheating, the replacement frequency is reduced to six months, sometimes more often.

To carry out maintenance, you will need to disassemble the angle grinder gearbox by unscrewing the 4 screws on its cover.

After removing the cover, you can see two bevel helical gears: a large gear and a small gear. The small gear is anchored and drives the large gear. The large one, in turn, is mounted on a secondary shaft, to which a cutting or grinding disc is attached.

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:

1. Body - the basis of the tool, inside which all the component parts are located
2. 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
3. The piston system is an integral part of the gearbox, which is responsible for generating impact actions
4. Chuck - has a special mechanism with quick fixation of working attachments
5. 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
6. 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
7. 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.

This is interesting!
During the production process of gears, an increase in metal dust occurs, which negatively affects the operation of parts, since it increases the friction force, which means increased heating and accelerated wear.
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.

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.

This is interesting!
Few people know, but to improve the performance of the tool, another unit of the tool also needs lubrication - the commutator unit.

How to properly remove old grease from an angle grinder

The disassembled grinder gearbox must be thoroughly cleaned of old lubricant. It no longer performs its functions, plus solid particles have already accumulated in it, resulting from wear of moving parts. When mixed with a new one, the old lubricant also significantly worsens its characteristics. Therefore, the gearbox and gears must be thoroughly cleaned.

Removing old grease from the gearbox

Remove old grease with a rag, paper towel or just a rag. Removed parts can also be washed in gasoline or solvent. Before assembly, the washed parts must be thoroughly dried. Residues of solvent or gasoline will mix with the new lubricant and change its consistency, which will again worsen its performance.

What and how to properly lubricate a drill?

What is the best way to lubricate an old Soviet-made drill?
the main thing is that before lubricating all parts of the gearbox, you need to remove the old grease and wash all the parts (except for the bearings). Well, then you can lubricate, as other opponents have already said, with lithol or graphite lubricant. it more or less reduces the wear and tear of all parts. and at a price it is more affordable for most. And it is imperative to coat the part of the drill or drill that is inserted into the cartridge or barrel. This prevents the base of the cartridge or the striker from breaking in the perforated drill.

For Soviet equipment, no better lubricant than Litol-24 has been invented; it must be put into the gearbox and lubricate the guides and gears in Soviet, and not only Soviet, equipment.

Naturally, before lubrication, you need to thoroughly clean and wipe all parts dry (no need to wash with solvent, diesel fuel, or gasoline!) , just clean and wipe dry.

Place and apply fresh Litol-24 and assemble - that’s all!

Litol-24 lubricant will withstand high speeds and increased temperatures and increased loads and friction, it is put into the gearbox in quite a large volume, as the experts say - the excess will come out!, so its work is designed for a long time, and replacement is actually only during repairs.

In Soviet times, both people and technology were not spoiled by delicacies - they grabbed what they gave.

So you can treat your veteran drill with what remains from Soviet times - even simple grease.

Among modern lubricants for gear mechanisms, you can use CV joint grease (motorists know what it is), lithol. Bosch lubricants have proven themselves well in gear drives.

If you're lucky and come across this

buy without hesitation.

When servicing the drill, do not miss this moment: remove, as thoroughly as possible, all the old lubricant, because there will probably be metal particles from the gears and other dirt that have penetrated inside the tool.

There are a lot of types of drills, both by purpose (impact, hammerless, drill-mixers, etc.) and by type of power, these include manual, electric and pneumatic.

Drills also differ in power and in the number of revolutions it can produce.

Manufacturers are different, many manufacturers produce their own lubricants and recommend using only them.

In any case, in order to lubricate the drill (its gearbox), you need to get to it (the gearbox).

There are also a lot of options here, perhaps your drill needs to be “split” into two parts (I’m talking about the body, unscrew the screws that secure the body).

Before us is a gearbox

It is not necessary to disassemble it into its components.

They removed the old lubricant (although this is not always done), thoroughly cleaned it of the old lubricant (a rag is convenient), put in a new one, in general, that’s all, there are no difficulties here.

an old Soviet-made drill?

Albina always lubricated his “ancient” Soviet drill with Litol-24, there was no thought of switching to something more “advanced”, the lubricant was completely satisfactory.

The procedure for applying lubricant to the grinder gearbox

Before applying new lubricant, it must be thoroughly mixed and ensure that there are no lumps or foreign objects in it. Apply a thin layer of lubricant to the gears, ensuring that it completely covers the teeth. It is more convenient to fill the bearings with grease using a syringe. Then the lubricant intended for angle grinders is driven into the gear housing. This is necessary for the reason that during operation it can fly off the gears and if there is a small amount of it, the gears will run “dry”.

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.

How much lubricant should be used when replacing an angle grinder gearbox?

The volume of lubricant put into the gearbox must be such that the oblique teeth of the gears are completely covered with it. An excess will lead to it being squeezed out from under the cover, and an insufficient amount will not ensure proper operation of the gearbox.

It is best to rely on the amount that was supplied by the manufacturer of the angle grinder, but you must remember that the lubricant can dry out and decrease in volume.

In this regard, it is better to put a little more and check the correct distribution of the lubricant after turning on the angle grinder. In general, the amount of lubricant is usually approximately 30–50% of the total capacity of the gearbox.

Lubricant applied to the gearbox

Which manufacturers produce lubricant for hammer drills?

To choose the right lubricant for a hammer drill, you will need to pay attention to models that have a note stating that the mixture is intended for the gearbox of a power tool. You can then choose the appropriate consistency based on cost. However, expensive lubricants are not always good, since in most cases buyers have to overpay just for the brand.

When choosing, you can give preference to lubricants from manufacturers such as Bosch, Makita, Lubcon and AEG. When purchasing substances from these manufacturers, you also need to consider one important factor - compatibility with specific models of power tools. It is worth noting another type of lubricant, ULTRA-0 - a semi-liquid substance that, when heated, turns into a liquid state. This type of lubricant is suitable for crankcase sealed and non-sealed gearboxes.

Similar types of lubricants can also be used for other types of power tools, for example, drills, screwdrivers, jigsaws. Not only the service life of the tool, but also its performance depends on the quality of the preventive maintenance carried out. Working with a device that regularly undergoes cleaning, lubrication and replacement of failed parts is not only pleasant, but also convenient, since the owner can always be sure that the unit will not let you down. Take care of your instrument as you would take care of yourself, and it will serve you faithfully, even regardless of who its manufacturer is - China or Europe.

Checking the correct application of lubricant to the angle grinder gearbox

The last step when servicing an angle grinder is to ensure that the lubricant is properly applied and distributed inside the gearbox. To do this, after the gear unit has been assembled, turn on the power tool without load for several minutes, while ensuring that there are no extraneous sounds, smells, etc. If they occur, you must immediately disconnect the angle grinder from the network. The heating of the gear unit is also checked. The lubricant must distribute heat evenly and the temperature of the gear unit should not be very high.

After some work, unscrew the 4 screws, then remove the cover from the gearbox. The helical gears should be visually inspected for the presence of lubricant. If it is missing, it means that too little lubricant was used and should be reported. If during work it is squeezed out of the cracks, then it means that there is too much of it and the excess should be removed. After making any changes, check the operation of the angle grinder again without load.

Can the drill gearbox be lubricated with lithol?

Can the drill gearbox be lubricated with lithol? I know about the benefits of branded lubricants, but I’m wondering if non-branded lithol is suitable or not?

it means it’s a matter of its quantity - I recently laid it, and after three days there’s a metallic sound - I’ll add more

SergeyE wrote: it means it’s a matter of quantity

If you stuff too much in, it will crawl out of all the cracks and the gearbox will get hot

What, it wasn’t? Or did you clean out the old one?

SergeyE wrote: after three days there is a metallic sound

When metal “communicates” with metal, a metallic sound occurs. The gears spread the lubricant along the walls and the sound appeared again

Suitable, but with big reservations. This is rubbish.

in my humble opinion

scattered too quickly on the walls. What lubricant will be next in quality?

SergeyE wrote: what lubricant will be next in quality?

Buy specialized Makita lubricant for gearboxes (30g white tube with a red cap). This is the only thing that is freely available.

Review of lubricants for grinders

It was previously said that there are many types of lubricants, both from foreign and domestic manufacturers. A good lubricant for power tool gearboxes is produced by Bosh. It’s called “Gearbox Lubricant” and is packaged in 65 gram tubes. One such tube is enough for several grinder maintenance.

Lubricant for grinder gearboxes of various brands

Of the lubricants intended for grinder gearboxes produced by domestic manufacturers, we can recommend products. It is called “Nanotech MetalPlak Electra” and is intended for tools that work under intense load. Also among domestic lubricants, CV joints or Tsiatim-221 are widely used, but they require preliminary preparation and, in fact, are a homemade lubricant.

Design and principle of operation

The gearbox is a complex mechanical transmission unit through which the axis of the motor-power unit transmits torque to the cartridge.

Two or three transmission stages are installed in the gearbox.

The design of the “household” dual-mode screwdriver assembly includes:

• The plastic case is a small drum that is mounted on a cartridge. The body itself is fixed motionless, and the chuck shaft is inserted into a clamp on one of the transfer plates;
• 2 or 3 transfer plates (carrier) - a round metal plate, on one side of each there are 3 protrusions for small gears. On the other side of one of them there is a clamp for the chuck shaft, and the other (or 2 others) has another so-called. a “planetary” gear that rotates three small gears;
• 6 or 9 small gears (three each: they can be of the same or different thicknesses) are the so-called “satellite” gears, which are installed and rotate freely on the projections of the transfer plates. With their teeth they interact with the sun gear located between them and with the ring gear, which is located on the inner surface of the housing;
• ring gear - a metal ring with teeth on the inside and small protrusions on one of the rings on the outside. It is placed on these protrusions and ball bearings on the inner surface of the housing.

DIY grease for an angle grinder

A self-made lubricant for grinder gears consists of a base and a diluent. The basis of homemade lubricant is usually a CV joint with molybdenum disulfide or Tsiatim-221. They have a second NLGI viscosity, so for use in an angle grinder gearbox, the base must be diluted. As a diluent, it is best to use simple mineral industrial oil, which, for example, is I-20 oil. To obtain a viscosity of NLGI 0, you will need to mix approximately 70 percent base and 30 percent thinner. The resulting mixture is thoroughly mixed and ready for application to gears and bearings of angle grinders.

Making your own lubricant

Timely maintenance of any electric tool is the key to its long-term and trouble-free operation. A properly functioning tool is also a guarantee of safety for the person using it. Using the tips given above, everyone can choose the right lubricant for the angle grinder gearbox and replace it without resorting to the help of expensive power tool service centers.

So, how to lubricate the gearbox to minimize its wear?

You must understand that power tools are sold ready to use. This means that the transmission unit of a new rotary hammer contains the right amount of oil, and it is “correct”.

Tool owners also know about the need to constantly lubricate the shanks of the working attachments. Grease for these purposes is almost always included in the tool kit.

Important, as an example!

The lubricant for the Makita rotary hammer gearbox, and the composition of the same brand marked “for drills,” are fundamentally different from each other. Consumables for the gearbox are marked with the generally accepted designation in the form of two gears.

However, not all manufacturers generously equip their tools with lubricants. Sooner or later, the owner has a question: what lubricant to use for a hammer drill?

Since universal lubricants (for example, Litol-24) are not always suitable for these tasks, it makes sense to look for trademarks of power tool manufacturers.

For example, lubricant for the Bosch rotary hammer gearbox is also suitable for other models. Elementary logic: if mechanical components operate under similar conditions, then the lubrication requirements are the same.

Just one point needs to be taken into account: the hammer drill mechanism must be exactly the same as that of the Bosch tool for which this lubricant is intended.

How to lubricate parts?

As for lubrication of a rotating hammer at home, as a rule, they provide independent oil changes on its individual parts. First of all, the gearbox must be lubricated. This mechanism is quite easy to disassemble, but has a complex design, so all actions must be performed in a strictly defined order.

First you need to prepare the necessary materials:

• Dry, clean cloth. rags;
• Mechanical tools required to assemble the gearbox;
• The ink itself.

In most cases, well-known global manufacturers, such as Bosch and Makita, indicate in their operating instructions the entire procedure for disassembling and assembling devices and give important recommendations. Owners of rotary hammers, who are the first to encounter such work, following these tips, can master all the manipulations quickly enough, with minimal effort.

But if such a guide is not at hand, then you should work on a specific algorithm.

• The tool must be kept away from dust and dirt.
• When disassembling and disassembling the drill and bit, you must remember the exact location of all functional parts so as not to mix them up during disassembly. It's better to use video capture.
• All work related to lubrication of parts is carried out only a certain time after the drill stops working. It must cool down, otherwise the coolant lubrication may cause the power tool to malfunction if it gets into hot areas.
• After removing all the main parts, including the gearbox, they are washed with spindle oil or gasoline, and then the excess moisture is thoroughly drained. Particular attention should be paid to the gearbox.
• Every part of the device must be checked as thoroughly as possible. Some areas lack lubrication. this means you don't need to apply new composition to the area.
• After applying the compound, the gearbox is carefully reassembled in the reverse order. If done correctly, the hammer can be used immediately.

In addition to the gearbox, the drill must also be lubricated. In this case, the tail of the mechanism, as in the first case, is washed with gasoline, cleaned and dried, and only then thoroughly lubricated with specialized oils.

At the same time, it makes sense to do it yourself and seal the cartridge , this will significantly increase its service life and also protect it from dust. However, it should not be overlooked that you only lubricate it when the open cartridge system is installed on the hammer drill . If the system is closed, no oil is required.