Do-it-yourself angle grinder grease for gearbox

What kind of lubricant to use for the gearbox angle grinder

The best option would be to use special lubricants for gearboxes, which come under the same brand as the tool itself. For example, if an angle grinder is called AEG, then the lubricant should be taken under the same name.

Using such products, you will maximize the life of your angle grinder, since each manufacturer produces lubricants taking into account all the features of their equipment.

However, the price for such branded items is quite high, which is why many do not want to shell out for it. In addition, a large number of people use inexpensive Chinese tools, the manufacturers of which did not bother with the issue of having their own lubricating products. Nevertheless, even such equipment should be serviced. And what to do in these cases?

The most unfavorable options will be grease and lithol, since they are not designed to work at high temperatures and excessive friction. Although some use them, dooming their machine to a quick failure. Trying to get immediate benefit, such users end up spending much more money.

Checking the correct lubrication of the gearbox angle grinder

Control of the amount of lubricant packed into the gearbox is carried out by trial switching on the assembled angle grinder for a short time at idle mode.

do-it-yourself, angle, grinder, grease, gearbox

If the gearbox starts to warm up, traces of grease leakage appear from the oil seals and gaskets, then the conclusion is clear. You have shifted the grease. Open the gear case and remove excess grease. Any excess grease will be deposited on the gearbox housing covers. An insufficient amount of lubricant in the gearbox is determined by the increased noise of the gearbox.

With prolonged operation of the angle grinder, the lubricant in the gearbox is distributed on the walls of the housing and loses its properties from external influences.

Having opened the gearbox cover, carefully inspect the condition of the lubricant, the tooth profile of the gears. If you can, check the contact patch of the gears.

The presence of particles of dry or dried lubricant in the area of ​​the gearbox or on the housing indicates that the time to change the lubricant has come.

Alternative lubricants

Refusal of special lubricant for the gearbox of the angle grinder can lead to negative consequences for the technical base of the tool, therefore, alternative solutions should be resorted to only in extreme cases. Most of the warnings concern materials such as lithol and solid oil. These funds can only externally imitate a full-fledged antifriction mass, but in work they turn out to be of little use. And yet, with what grease to lubricate the gearbox of an angle grinder, if it is not possible at a particular moment to use a special compound? Experienced craftsmen advise to always have a universal grease for the ball bearing group on hand. This is an inexpensive product, but according to its main characteristics, it can, albeit for a short time, make up for the lack of the required lubricant for the gearbox.

Grease application technique

During the operation of the angle grinder, it is important not to miss the moment when the tool requires renewal of lubricant. It is not always possible to determine it by external signs, therefore, you should periodically disassemble the crankcase and directly inspect the condition of the gearbox. Lubrication will be required either if the previous composition dries out, or if its quantity is insufficient.

Next, you should determine which lubricant is best for the gearbox of an angle grinder of a particular model? Again, if we are talking about manufacturers of the level of Makita, Bosch, AEG, then you can rely on the lubricants of the same brands. But if the angle grinder is made by a little-known Chinese company, then it is better to contact specialized manufacturers.

For lubrication, you will need to disassemble the tool, remove the gearbox and clean it. How to remove the old composition will be described separately. By the time of application, the lubrication tool should be ready. an oiler with a suitable nozzle or a syringe supplied with the product. Apply exactly the volume that is enough to completely cover the working space without gaps.

Do-it-yourself angle grinder grease for gearbox

Although the listed lubricants of domestic production are affordable, they are not always at hand.

Is it possible to make a lubricant for the gearbox of an angle grinder with your own hands?

And there is an affirmative answer to this question.

Since the main technical characteristics of lubricants for gearboxes of an angle grinder are presented above, they can be taken as the basis for drawing up a lubricant of the desired characteristics with your own hands.

Homemade gear grease should be based on a highly adhesive grease. It must adhere firmly to the touching parts.

Grease for CV joints has increased adhesion. SHRUS is a joint in a front-wheel drive vehicle that works in conditions of increased dirtiness, shock loads, temperature fluctuations and humidity.

Taking grease for CV joints as a basis, it is necessary to add liquid grease (MS-20) to give the mass the desired consistency. Oil MC-20 must be served dropwise, thoroughly kneading the mass using a homemade mixer.

Good results are obtained by a mixture of a mixture of Tsiatim-221 and TAD-17 lubricants, where Tsiatim is the basis.

Bearing Grease Angle Grinder

Three bearings are installed in the design of the angle grinder. Two bearings are mounted on the rotor of the tool, one bearing is mounted on the shaft of the driven helical gear of a larger diameter.

The angle grinder uses bearings already filled with grease. But from improper operation, overheating of the tool, grease flows out.

How to Choose the Right Bearing Grease Angle Grinder?

Bearing grease must meet the following requirements:

  • increase sliding;
  • reduce friction between component parts of parts;
  • evenly distribute heat and act as a coolant;
  • prevent the occurrence of corrosion;
  • protect from dirt and dust getting inside;
  • work in the required temperature range up to 150C;

The operating conditions of the electric motor bearings differ from the operating conditions of the gearbox bearing, not only because of the temperature requirements, but also because of the operating modes, load modes, frequency and speed of rotation.

The grease for the bearings of the electric motor must have protective properties that prevent the ingress of dirt, dust and moisture on the bearing parts.

The Russian market offers a wide range of foreign greases designed for bearings operating in different conditions. But their cost makes us look for cheaper, not inferior in quality, domestic lubricants.

Among domestic lubricants, we recommend paying attention to the Tsiatim-221, VNIINP-246 (GOST 18852-73), VNIINP-235 lubricants.

Well proven lithium greases.

Possessing high water-repellent properties, they have a wide temperature range. The role of the thickener in them is played by organic and inorganic substances. For sealed bearings, it is best to use CIATIM-203, VNIINP-242 greases.

Among pigment greases for electric motor bearings, blue grease VNIIMP-246 and dark purple ointment VNIINP-235 have become widespread. The first grease is less common than the second one due to its high price.

In today’s Russian market, domestic manufacturers of lubricants are represented in a wide range of products.

It is better to use the lubricant in practice.?

In the opinion of the overwhelming majority of experts, the required lubricant for an angle grinder must correspond to the manufacturer of the device used. That is, if the technique is released under a certain brand, then the lubricant must be chosen the same. This option is optimal, since the development of such materials is carried out by specialists who take into account all the features of a particular device. In order for the unit to work with maximum efficiency and for a sufficiently long time, it is better to use original lubricants. This approach will save the owner of the angle grinder from many unnecessary problems associated with maintaining the tool and with its use.

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If for some reason the master does not have the opportunity to use the optimally suitable lubricants, then the second preferred option would be grease for CV joints. It also allows you to achieve good results and is used by many on an ongoing basis. Finding it on sale is easy enough.

The worst way to keep the gearbox in good condition is to use grease and lithol. It should be said right away that many do not disdain these materials either, but you should not rely on the full-fledged operation of the tool. Even if the difference is not visible for short periods, after a while the master is likely to run into problems.

If, nevertheless, the user has chosen the best way to take care of his angle grinder, it is worth deciding what kind of original grease is used to lubricate the gearboxes of the Makita angle grinder? Or if a device from another manufacturer is used, then in accordance with it. This will create the most favorable conditions for long-term and high-quality operation of the equipment and in order to solve the corresponding problems with the maximum possible results.

Features of the

Manufacturers of angle grinders, rotary hammers, drills and other electrical engineering, creating a mechanism with moving parts that rub against each other, apply a special mass to them. Their internal composition may differ from each other. Therefore, when thinking about how to process the mechanism, you need to look at the operating instructions for this power tool. It may say what exactly needs to be applied to gears and other parts.

As you know, such tools work under heavy loads, because of this, the mechanism can get very hot. These substances prevent equipment from failing prematurely. The components that make up the lubricant reject heat from the rubbing elements. They can also prevent the metal from rusting. With the help of these products, you can increase the work of equipment for a long time.

Harbor Freight Drill Master Angle Grinder Gearbox Grease Replacement

The main working link of the angle grinder is the gearbox. It is a part consisting of gears. The rotor provides rotation of the tool. In this case, the small gear transmits the torque to the large gear.

This liquid in this place is designed to reduce the force that occurs during friction, as well as to reduce the heating temperature. In addition to gears, it is desirable to process bearings.

This mixture must be of high quality in the environmental sense, and also meet three main criteria: viscosity not more than 800, strength threshold not less than 120, heating temperature not less than 120.

The mixtures used must be free from mechanical impurities, resist corrosion, adhere firmly to parts, repel water and any moisture, and must not melt when the temperature rises. The motor and gearbox have different bearings. Because of this, the lubricant for them is also different. After all, the working conditions are different.

Brand manufacturers of angle grinders are also involved in the production of the mass with which their products are processed. It is very comfortable. Indeed, complete with the tool, you can immediately purchase quality products for its care. The manufacturer guarantees the quality of the product. All the necessary characteristics of lubricating mixtures are thought out and correctly selected.

Some manufacturers reinsured themselves and foresaw the moment that the buyer can choose not a branded lubricant, but a cheaper product and under a different name. In such a case, the manufacturers do not give a guarantee, and in the event of a breakdown, repairs will not be made.

Many users consider branded products to be expensive and prefer car products. At first glance, there will be no changes in the work. But experts note that after a certain time, this leads to wear of parts and you will have to pay not for lubrication, but for new parts for the tool.

It is better to initially pay a little more for a good lubricant than to pay much more money for tool repairs later.

Selection Tips

Greases for gearboxes and bearings (eg bevel gears) differ in properties. Bearing materials must have increased adhesion. It is necessary that the lubricant firmly adheres to the gear teeth during operation. The gearbox is spray lubricated.

Suspended lubricants form a kind of fog during operation. In addition to adhesion, there must be other qualities. For example, the resistance to high temperatures of the lubricant is important. It should withstand high temperatures without problems and not melt under them.

Lubrication process and its stages

You can make lubrication with your own hands or do it in special workshops. You should be aware that when processing any instrument, an inappropriate fluid can lead to incorrect operation of that instrument itself. Before applying new grease, the old one must be completely removed. The mechanism must be completely free of old grease.

Instructions on how to lubricate the angle grinder gearbox:

  • disassemble the tool;
  • wash the necessary gearbox parts with gasoline;
  • wait until the gasoline dries up;
  • beat the grease;
  • coat the bearing and gears with grease;
  • assemble the angle grinder in reverse order.

It is not necessary to apply a lot of funds to the parts, it is necessary to lay exactly as much mass as prescribed in the instructions. If you overdo it with the amount, the product will start to flow out when the tool is running. The gearbox will malfunction and function with difficulty. This will lead to its rapid breakdown.

The agent to be applied should be less than half the volume of the gearbox itself.

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Brands and their characteristics

For example, one of the most expensive imported ointments has the following characteristics:

  • used for molybdenum;
  • has the second class in viscous properties;
  • retained ISO standards;
  • in the process of developing the grease, the German DIN standards were applied;
  • belongs to type K.

You will have to pay dearly for a lubricant with such characteristics. It is called “Makita”. You can buy it in tubes. The advantage of the high price is the quality and duration of use. Therefore, cheaper lubricants are also presented on the Russian market. High for lubricants from a foreign manufacturer increased interest in domestic products.

Russian liquids are suitable for different types of instruments and are not inferior in quality. Rotary hammers, drills, gearboxes. they all have their own types of lubricants.

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Tsiatim-203 is used for closed types of bearings. It is better not to lubricate other bearings.

There are also pigment lubricants, they differ in their color. There is a blue and dark purple VNIINP grease. You will have to pay more for the first option than for the second. Therefore, they buy it less often. Although the product quality is pretty good and well worth the money spent.

How to use?

They apply grease to the nodes for a reason. It is necessary to correctly determine where to apply it, in what order to do it, as well as how much lubricant mixture is needed. There is a maintenance plan for the angle grinder. It clearly states when to change the lubricant. This is usually done if parts break or fail.

Old grease can be identified by its appearance, it has a dirty dark color. This is caused by particles of dust, metal that get into the lubricant during the work. The outdated mix is ​​usually changed. At the same time, no traces of old lubricant should remain on the parts. And if the reason was a breakdown of the part, then you need to carefully remove all the destroyed particles that could remain in the sections of the case.

Rinsing fluids are often used to remove grease. These include often used engine cleaning mixtures. If this is not at hand, then you can always use kerosene or gasoline. After processing, it is advisable to dry the parts well. After cleaning, the process of applying grease is started. Its layer must remain thin.

The bearings should be lubricated as if stuffing. Lubricants are simply squeezed out of the tube until they flow from the opposite side. Everyone is interested in how much lubricant should be. When applied to bearings, the amount of grease is controlled by the outflow.

But with the gearbox, the situation is different. There are certain norms for him. After all, if you overdo it with lubricants, they will leak out during operation. But an insufficient amount will not bring good results when working with your equipment.

An amount of grease is poured into the gearbox, which completely covers the gears. It is very easy to control the correctness of the application. To do this, you just need to turn on the assembled angle grinder for a short period of time. If in a couple of minutes the gearbox became hot, a leaky mass appeared, then the quantity was clearly overdone. In this case, you need to reduce its amount. To do this, you just need to disassemble the gearbox and somehow remove excess grease.

But if a loud noise appears when turning on the angle grinder, then the amount of lubrication is insufficient, and this point will also have to be corrected. It may lose its properties with prolonged use of the angle grinder. From time to time you need to check its quality. To do this, open the gearbox cover and inspect the part. If you can see dry or slightly dried areas of the lubricant, this means that you need to replace it.

Correct grease filling process in angle grinders

After the choice of lubricant for the angle grinder is made, proceed directly to the maintenance of 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, check the correct application. Removing the old grease is necessary for the reason that mixing with new grease will not allow it to work correctly and the entire maintenance procedure will not bring any result.

Correct packing of grease into the angle grinder

When to change the lubricant in an angle grinder

The frequency of changing the lubricant depends on how often and under what load the tool is used. Typically, this interval is about a year. In the 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 4 screws on its cover.

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

Overview of lubricants for angle grinders

Earlier it was said that there are many types of lubricants from both a foreign manufacturer and a domestic one. A good lubricant for power tool gearboxes is available from Bosh. It is called “Lubricant for gearboxes” and is packaged in tubes of 65 grams. One such tube is enough for several servicing angle grinder.

Grease for gearbox angle grinder of various brands

Of the lubricants intended for the gearbox of the angle grinder, produced by a domestic manufacturer, we can recommend the products of the Nanotech company. It is called “Nanotech MetalPlak Electra” and is intended for tools that work with intense load. And also from domestic lubricants, SHRUS or Tsiatim-221 are widely used, however, they require preliminary preparation and, in fact, are a homemade lubricant.

How to properly remove old grease in an angle grinder

The disassembled angle grinder gearbox must be well cleaned of old lubricant. It no longer fulfills its functions, plus solid particles have already accumulated in it, resulting from wear of moving parts. Mixing with new, old lubricant also significantly degrades its performance. 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. The removed parts can also be washed in gasoline or thinner. The washed parts must be thoroughly dried before assembly. Residual solvent or gasoline will mix with the new grease and change its consistency, which again will worsen its performance.

Checking the correct lubrication of the gearbox angle grinder

The last step in servicing your angle grinder is to check that the lubricant is correctly applied and distributed inside the gearbox. To do this, after the gear unit is assembled, the power tool is turned on without load for a few minutes, while ensuring that there are no extraneous sounds, odors and other things. If they occur, you must immediately disconnect the angle grinder from the mains. The heating of the gear unit is also checked. The lubricant must distribute heat evenly and the temperature of the gear unit must not be too high.

After a short work, unscrew 4 screws, then remove the cover from the gearbox. Visually inspect the helical gears for lubrication. If it is absent, then too little lubricant has been loaded and should be reported. If in the process of work it squeezes out of the cracks, then it was laid too much and the excess should be removed. After making any changes, check the operation of the angle grinder again without load.

Gearbox grease angle grinder

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

Open Gear Lubricant Angle Grinder

In addition to original oils, there are many third-party lubricants on the market, so the question of how exactly to lubricate the gearbox of an angle grinder is not acute.

The products of Haskey, Castrol, Liqui Moly and others have shown themselves well for adding to the gearbox of the angle grinder.

Russian manufacturers also keep up with foreign ones and offer their products. So, the lubrication of the bevel gearbox is an angle grinder from the Nanotech firm. Of course, such a lubricant for the gearbox is not original and recommended by the manufacturer, therefore, if it is used, the subsequent warranty repair may simply be refused.

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Gearbox grease angle grinder

The guarantee of a long life of any hand tool consists in correct periodic maintenance. Of course, you can give it to special service centers for maintenance and diagnostics, but, as they say, “If you want to do well, do it yourself.” Therefore, it is worth figuring out how to independently service such a popular tool among home craftsmen as an angle grinder or an angle grinder, in common people.

The movable parts of the angle grinder are most susceptible to wear. These are the bearings of the armature, gears, as well as the gears themselves, which are in the gearbox. The lubricant (or lubricant) put in by the manufacturer ages over time, its properties are lost, all this leads to greater wear of the gears in the gearbox and, as a consequence, to increased vibration and the appearance of extraneous noise during operation. Periodic maintenance and replacement of the lubricant in the gearbox of the angle grinder must be carried out at least once a year.

Bearing grease phase

What, how and when to lubricate the angle grinder

Lubricant for the gearbox angle grinder: service life, the main stages of replacement. Application technology, recommended amount. Selection criteria and options, self-made lubricant.

In angle grinders (angle grinder), commonly called angle grinders, the main load falls on the gear reducer that changes the axis of rotation.

Care is required throughout the entire period of operation, since the mechanism needs to reduce friction between its interacting parts, timely maintenance.

The use of lubricant for the gearbox of the angle grinder allows not only to minimize the destructive frictional effect, but also helps to cool the tool.

How much grease is required to replace

Therefore, it is better to first put in a little more material than required, and make sure that the lubricant is evenly distributed after the gears of the reducer are activated. The generally accepted norm is filling with lubricant about 40% of the volume of the gearbox.

What kind of lubricant to choose

  • the use of expensive special lubricants for gearboxes from well-known brands;
  • the use of universal compounds suitable for any power tool;
  • lubrication of the gearbox with lithol or grease;
  • using a self-made lubricant.

Application of special materials is the optimal solution. When choosing a lubricant for a gearbox, it is recommended to give preference to compounds produced under the same brand as the angle grinder itself. For example, if the machine is of the AEG brand, then the lubricant must be bought of the same brand.

When using specialized products, the service life of the angle grinder is significantly increased, since the manufacturer takes into account all the features and nuances of operating its own equipment. The disadvantage of using branded materials is their high cost, which can affect the family budget.

Most craftsmen use budget angle grinders or tools made in China. For such machines, specialized lubricants have not been developed by the manufacturer and are unlikely to ever appear. However, this technique also requires maintenance. How to proceed in this case?

Specialists and service technicians recommend purchasing any budget non-branded composition designed specifically for gearboxes. You can also use the grease used for CV joints. the hinge of front-wheel drive vehicles operated under significant loads.

The most unfavorable solution is the use of lithol or solid oil, since both of these materials are not designed for lubrication of friction units heated to high temperatures.

Some owners of an angle grinder use only these compounds, which is why their machines cannot last for the lifetime declared by the manufacturer. In an effort to benefit from the here and now, they do not factor in future spending on a new tool or replacement of expensive parts.

When to change the lubricant in an angle grinder

The timing of the next grease change depends on the loads and the intensity of use of the angle grinder. Usually it is equal to 12 months. With everyday use, an angle grinder with frequent overheating, the change frequency is significantly reduced, at least to six months.

To make sure it is necessary to add a new amount of grease, the gearbox must be disassembled by unscrewing the screws on its cover. Inside there is a pair of helical gears.

The small one is placed on the anchor and is used to drive the large one located on the secondary shaft. A grinding or cutting disc is attached to this shaft.

During operation, the lubricant, when the gearbox moves, scatters along the walls of the housing, drying out over time and forming large lumps. The material used for a long time overheats, becomes liquid and flows out of the case.

Therefore, its volume in the gearbox decreases. If there is only a thin layer of lubricant on the gears, add lubricant.

The grease for the angle grinder must be changed if there are dried lumps on the inner walls of the gearboxes or if it is insufficient.

Old grease removal phase

Removing used grease is the first step in gearbox maintenance. It is necessary to remove the old layer for several reasons:

  • the spent lubricant is not able to perform its functions;
  • it contains small particles formed during the wear of the rubbing elements;
  • old grease will mix with new grease, because of this, the unit will not work correctly, replacement will not bring any results.

Removal of waste is carried out using disposable paper towels, rags or a piece of tissue at hand. The removed parts of the gearbox should be thoroughly washed in thinner or gasoline, and dried before installation.

Residues from cleaning materials can also mix with the new grease and change its consistency, resulting in performance degradation.

How to properly lubricate an angle grinder

Gearbox lubrication stage

The gearbox must be filled with such a volume of grease that it completely covers the gears.

The sufficiency of lubrication for the angle grinder gearbox is checked by switching on the angle grinder for a short time. If, within 3-5 minutes of operation, the node temperature has increased and lubricant is leaking out, part of its volume must be removed. To do this, the gearbox is disassembled again, the excess is removed with a rag or rag.

When checking, the opposite situation can be observed, when a noise appears when the angle grinder is turned on. This means that there is not enough lubricant and needs to be added.

When using an angle grinder, a periodic check of the adequacy of lubrication of the gearbox elements, the quality of the available lubricant is required.

To carry out routine inspections, it is necessary to unscrew the bolts tightening the cover and visually inspect every detail. If slightly dry or completely dry areas are observed, a complete replacement of the lubricant is recommended.