The Better To Lubricate The Grinder Gearbox

The choice of grease for the grinder or the better to lubricate the gearbox The selection of grease for gearboxes and bearings of any grinder, how to lubricate the parts of angle grinder, Makita. What is the best lubricant for grinders gearboxes and how it can be replaced.

Correct grease filling process in angle grinders

Packing grease into the units of an angle grinder has its own rules. You need to know not only the order of its application, but also how much, and where to lay it.

How to properly remove old grease in a grinder

Old grease is always removed completely, regardless of its color. There should be no traces of old grease on the parts, and particles of destroyed parts in the cavities of the body.

To remove old grease, you can use various flushing fluids used by motorists to wash the engine and its parts. At home, it is recommended to use kerosene or a solution of kerosene and gasoline.

All parts and their cavities must be thoroughly washed and dried.

Grease for bearings LBM

The design of the angle grinder has three bearings. Two bearings are mounted on the rotor of the tool, one bearing is mounted on the shaft of the driven helical gear with a larger diameter.

Bearings already filled with grease are used in angle grinders. But from improper operation, overheating of the tool, grease flows out.

How to choose the right grease for grinder bearings?

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

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

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

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

Well proven lithium greases.

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

Of pigment lubricants blue grease VNIIMP-246 and dark purple ointment VNIINP-235 are widely used for electric motor bearings. The first lubricant, due to its high price, is less common than the second.

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

The procedure for applying grease to the grinder gearbox

The new grease is thoroughly mixed before application and applied in a thin layer. The bearings are lubricated by packing. If the grease is in a plastic tube, the neck of the tube is pressed against the side bearing cage and squeezed out until it flows out of the back.

What amount of lubricant should be used when replacing in the LBM gearbox

If the amount of grease in the bearings is controlled by flowing it out from the reverse side, then a certain amount of grease is packed into the angle grinder gearbox. Excess grease will leak out during operation. And a small amount of it will not ensure high-quality operation of the gearbox.

Leave as much lubricant in the gearbox as needed to cover the gear teeth.

Apply enough grease as a guide so that it occupies slightly less than half the volume of the gearbox cavity.

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Diy grease for the grinder gearbox

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

Is it possible to make do-it-yourself lubricant for the gearbox of an angle grinder

And there is an affirmative answer to this question.

Since the main technical characteristics of lubricants for LBM gearboxes are presented above, they can be taken as the basis for making a lubricant of the required characteristics with your own hands.

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

Grease for CV joints has increased adhesion. The CV joint is a joint in a front-wheel drive vehicle that operates in conditions of increased pollution, 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 should be served drop by drop, thoroughly kneading the mass using a homemade mixer.

The Better To Lubricate The Grinder Gearbox

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

Recommendations

Before choosing which grease to lubricate the grinder gearbox, you should familiarize yourself with the general requirements for it:

  • Grease must not leak out under high loads (long-term operation). With some formulations, there is such a problem when heated, they liquefy and lose some of their properties.
  • It is advisable to choose a special lubricant, and from the company that produced the tool. On the other hand, such formulations are usually more expensive than others.
  • Environmental Safety. The claim has become popular relatively recently, but its importance is difficult to refute.
  • Avoid using non-specialized formulations, such as solidol or lithol, although, in theory, you can resort to their help.
  • It is advisable to give preference to silicone-based formulations, since they have high thermal and mechanical resistance.

How can you lubricate the grinder gearbox?

The grinder is a popular tool used for cutting various materials. Due to its versatility, the intensity of use of the grinder by the average owner is quite high, which necessitates competent maintenance.

Need for lubrication

Like any device with a motor and rotating elements, the grinder needs lubrication. The absence of such leads to various negative consequences:

  • Decrease in speed;
  • Overheating of equipment;
  • Overheating of the disk;
  • Deterioration of cutting properties;
  • Increased risk of accidents.

Lubrication in the grinder gearbox is an important contribution to the efficiency and safety of work, since it is this element that is subjected to the greatest stress. Let’s figure out how to lubricate the grinder gearbox to ensure optimal tool performance.

Lubricant selection

So, how to lubricate the blank reducer?

First of all, specialized formulations are recommended. Usually, such a grease has a blue color and a rather long marking, which reflects the mass of various parts: the type of additives, the viscosity grade, compliance with certain standards (usually ISO or DIN).

This type of lubricant is specially designed for the grinder conditions, therefore it is optimal for its task. When choosing which lubricant to use for the grinder gearbox, pay attention to the following parameters:

  1. Maximum and minimum working temperature. The latter circumstance is especially important in the conditions of our country.
  2. The presence of extreme pressure additives.
  3. Slide type (in most cases, we are interested in bearing).
  4. Consistency (must correspond to that recommended in the instructions for the equipment).

Please note that universal greases such as grease or lithol are not designed for operating conditions typical for grinders. In emergency circumstances, they can be used, but it is recommended to change to specialized formulations at the earliest opportunity.

In addition, it is better to entrust the filling of the gearbox with lubricant to the specialists of specialized service centers.

Need for lubrication

Like any device with a motor and rotating elements, the grinder needs lubrication. The absence of such leads to various negative consequences:

  • Decrease in speed;
  • Overheating of equipment;
  • Overheating of the disk;
  • Deterioration of cutting properties;
  • Increased risk of accidents.

Lubrication in the grinder gearbox is an important contribution to the efficiency and safety of work, since it is this element that is subjected to the greatest stress. Let’s figure out how to lubricate the grinder gearbox to ensure optimal tool performance.

How can you lubricate the grinder gearbox?

The grinder is a popular tool used for cutting various materials. Due to its versatility, the intensity of use of the grinder by the average owner is quite high, which necessitates competent maintenance.

Recommendations

Before choosing which grease to lubricate the grinder gearbox, you should familiarize yourself with the general requirements for it:

  • Grease must not leak out under high loads (long-term operation). With some formulations, there is such a problem when heated, they liquefy and lose some of their properties.
  • It is advisable to choose a special lubricant, and from the company that produced the tool. On the other hand, such formulations are usually more expensive than others.
  • Environmental Safety. The claim has become popular relatively recently, but its importance is difficult to refute.
  • Avoid using non-specialized formulations, such as solidol or lithol, although, in theory, you can resort to their help.
  • It is advisable to give preference to silicone-based formulations, since they have high thermal and mechanical resistance.
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Lubricant selection

So, how to lubricate the blank reducer?

First of all, specialized formulations are recommended. Usually, such a grease has a blue color and a rather long marking, which reflects the mass of various parts: the type of additives, the viscosity grade, compliance with certain standards (usually ISO or DIN).

This type of lubricant is specially designed for the grinder conditions, therefore it is optimal for its task. When choosing which lubricant to use for the grinder gearbox, pay attention to the following parameters:

  1. Maximum and minimum working temperature. The latter circumstance is especially important in the conditions of our country.
  2. The presence of extreme pressure additives.
  3. Slide type (in most cases, we are interested in bearing).
  4. Consistency (must correspond to that recommended in the instructions for the equipment).

Please note that universal greases such as grease or lithol are not designed for operating conditions typical for grinders. In emergency circumstances, they can be used, but it is recommended to change to specialized formulations at the earliest opportunity.

In addition, it is better to entrust the filling of the gearbox with lubricant to the specialists of specialized service centers.

How to lubricate the grinder gearbox?

Welcome to another article on the site! Today we will talk about how to lubricate the gearbox of the grinder (angle grinder), as well as how and when it is done.

While using this tool, any user sooner or later comes across this question. There are, of course, unresponsible people who do not monitor their equipment at all. And they end up failing it earlier than expected.

To avoid this, certain simple procedures must be followed. For angle grinders, the main such maintenance action is to replace the lubricant in the gearbox. Yes, it is a replacement, not a simple addition. I’ll explain why below.

What kind of lubricant to use for the grinder gearbox?

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

By 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 technology.

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. And yet, even such equipment should be serviced. And what should you 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 benefits, such users end up spending much more money.

When do you need to change the lubricant in the grinder gearbox?

So, you’ve detached the gearbox and looked inside. What should you see there in order to understand that it’s time to make a replacement?

During operation, grease scatters along the walls of the gearbox housing. As a result, over time, it begins to dry out, forming lumps. If you notice this, then it means that it is time to change it.

It should also be borne in mind that the grease can overheat during operation, which is why it becomes liquid, as a result of which it simply flows out. For this reason, it becomes small and this is also noticeable. If it does not lie on the gears in a rather thick layer, then it is not enough.

So, we conclude that we carry out a replacement in the presence of dried grease or with a small amount of it.

How to lubricate the grinder gearbox?

Now, knowing what and when to lubricate, you need to know how it is done. Here, the main rules mean that there should be enough lubricant to eliminate excessive friction, but not too much so that it does not leak out.

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However, first you need to get rid of the old grease. To do this, you can use kerosene or a mixture of the latter with gasoline. Any fluids used to flush a car engine are also suitable. All parts of the gear unit should be thoroughly rinsed to ensure that they are completely clean. Only then can you start a new lubrication.

The required amount of new grease can be determined by eye; it should be slightly less than half of the inner space of the gearbox. When you squeeze out the right amount, spread it over all rubbing parts. After that, you need to assemble the angle grinder, turn it on and let it run for a short time at idle.

If grease is leaking out of the slots, there is too much of it. You will have to disassemble everything again and remove the excess.

If there is little lubrication, then the gearbox emits some rattling. In this case, be sure to make a supplement.

That’s all! These are the rules for the selection and application of lubricant to the gearbox of an angle grinder. I hope this text was useful to you. Until next time!

Which 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;
  • Gear lubrication with lithol or grease;
  • Use of self-made lubricant.

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

When using specialized products, the service life of angle grinders 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.

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 grinders use only these formulations, 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.

Gearbox lubrication stage

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

Control of the sufficiency of lubrication for the LBM gearbox is carried out by turning on the grinder for a short time. If, after 35 minutes of operation, the temperature of the assembly 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 noise appears when the angle grinder is turned on. This means that there is not enough lubricant and must be added.

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

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;
  • The old grease will mix with the new one, because of this, the unit will not work properly, 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 poor performance.

How to properly lubricate the angle grinder How much lubricant 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 to fill with lubricant about 40% of the volume of the gearbox.