What kind of lubricant is used in the gearbox of the angle grinder

Checking the accuracy of the application

Angle grinder grease, namely its abundance, is checked in idle mode during a test run for a short period of time. After starting, the gearbox starts to warm up. If part of the lubricant flows out when the gearbox is warmed up, then it is necessary to disassemble the tool again and remove the excess.

If, as a result of a short period of idle operation, signs of noise or rattling appear, then the volume of the applied layer must be increased.

Gearbox grease angle grinder. selection principles and course of application

kind, lubricant, used, gearbox, angle, grinder

The angle grinder, like other tools used in the household and professional activity, requires regular maintenance. Operational efficiency and durability are ensured by timely service.

Angle Grinder Lubricant is the main component when servicing the device. To improve performance, choose the right formulation.

Substitution rules

The main modular unit of the angle grinder is the gearbox. It takes over the bulk of the load during operation. It contains helical gears that transmit torque from the rotor to the active element. Lubrication of the gearbox of the angle grinder provides a reduction in the frictional force in the gears. And also helps to reduce the temperature that occurs during operation.

When to change the lubricant? During operation, the lubricating coating spreads out to the sides of the gearbox housing. After a short time, it begins to dry out and lumps form. Lumps can accumulate dust and metal particles generated during operation. If, when disassembling the angle grinder, lumps are found, then a new lubricant is needed for the gearbox of the angle grinder.

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There are situations when it is required to replace parts of an angle grinder gearbox or rotor bearing. In this case, it is necessary to disassemble the device. Accordingly, the lubricating layer will be removed. New material is applied instead.

For long periods of operation, the angle grinder gearbox heats up. Accordingly, the used coating also starts to warm up. When hot, the lubricant becomes liquid and may leak out. As a result, little remains inside it. This can be seen by looking at the gears. There should be a thick layer on them. Thus, with a small amount of lubricating coating, it is necessary to replace it.

Popular brands of lubricants

Foreign-made gear lubricants are much more expensive than domestic ones. The Bosch brand is widely known from foreign countries. It is used to lubricate tools of the same brand, as well as other models of angle grinder. The coating has good performance.

From domestic manufacturers, the products of the Nanotech company are known under the name Metal Plak Electra. Lubricants of this brand are used for many components of an electric tool.

Operation of an angle grinder without a lubricant coating will first lead to minor malfunctions, and then to the failure of the tool. Lubricated gearboxes will extend tool life and increase productivity. What kind of lubricant is suitable for the existing device, the master himself decides.

What is the lubricant in the gearbox of the angle grinder

Angle Grinder Lubricant to keep your work running smoothly

For good operation, an angle grinder needs a lubricant that will not leak out under heavy loads and long-term operation, but will reliably lubricate the part over its entire surface during the entire operation time. It must also be environmentally friendly. Pay attention to well-known and already proven manufacturers of lubricants, such as Lubcon, Hammer, Makita, Hitachi. Experts advise, whenever possible, to choose a lubricant of the same company as your tool.

Advice! Experts do not recommend using materials such as solid oil and lithol.

When deciding how to lubricate your angle grinder, pay special attention to materials based on silicone or silicone oil. These lubricants are excellent for tools that operate at a range of speeds from slow to high speeds and under any load. They are highly resistant to oxidation, protect against corrosion, and are easily combined with plastics and elastomers. The composition contains only silicone and a lithium thickener, which makes them environmentally friendly. The consistency is maintained at temperatures from 50 to 190 degrees Celsius.

One of the most important elements of an angle grinder is the gearbox. When the tool is in operation, it heats up a lot, because it is behind it that the gears rotate, which leads to strong heating. It is for these reasons that the gearbox casing is made of metal, because it removes heat quickly enough. But the casing alone is not enough to cope with the high temperatures, and proper lubrication plays a huge role.

Each specialist, when asked how to lubricate the gearbox of an angle grinder, will answer that it is best to use a special lubricant for an angle grinder. It is specially designed for the job and the environment in which this tool is used. This grease has a specific blue color. A good quality gear lubricant for the angle grinder is marked as follows: MoS2 NLGI 2 ISOL-XBCHB 2 DIN 51825-KPF 2 K-20. Marking means:

  • MoS2. molybdenum disulfide acts as an additive;
  • NLGI 2. second viscosity grade;
  • ISOL-XBCHB 2. compliance with ISO standards;
  • DIN 51825-KPF 2 K-20 is the most important point, it means that the grease complies with German DIN standards.
  • 51825 indicates that the material corresponds to a type K grease.
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The price for such a mixture is very high, but there is a cheaper grease with similar qualities: KPF 2 K-20, where:

  • K. designed for sliding bearings;
  • P. with extreme pressure additives;
  • F. with solid filler;
  • 2. consistency complies with NLGI;
  • K. maximum operating temperature 120 degrees Celsius;
  • 20. minimum operating temperature.

Note! The use of special lubricants for the angle grinder will give the maximum guarantee of reliable operation.

Particular attention should be paid to the lubrication of the angle grinder, which are under warranty. It is not recommended to do this on your own; you should entrust this work to specialized workshops. There will be used high-quality and original materials with the correct dosage. At home, you can apply the mixture incorrectly, which will negatively affect the durability of the tool.

Advice! It is recommended to take to specialized services not only an angle grinder under warranty, but also those that have already passed the warranty period.

Various lithols and greases for lubricating gears and bearings are strictly prohibited. In addition, opening the case on warranty tools will become a reason for refusing to service, and the use of “unauthorized” lubricant is generally a gross violation of the operating rules for an angle grinder. The only exceptions are external nodes, which, according to the instructions, must be regularly processed.

Preventive maintenance of parts and mechanisms angle grinder

In connection with the work performed, in which the occurrence of stone, wood and metal dust is inevitable, as well as its ingress into the housing of the angle grinder and settling on the moving mechanical parts of the gearbox, the angle grinder needs periodic preventive inspection and is reduced to the following actions:

  • Removal of dust and larger debris from the gearbox housing;
  • Checking the presence of grease in bearings and gears, as well as the integrity of the graphite brushes and replacing them if necessary.

How to Apply Lubricant for Gearbox Angle Grinder

Electromechanical hand-held construction tools for household and industrial use with replaceable attachments. The instrument was invented and created in 1954 in Germany (FRG). The first models of angle grinders that appeared in the USSR at the end of the sixties were the angle grinder produced in the angle grinder city of Plovdiv, hence their name, used in Russia to refer to this tool in colloquial speech.

How to use the lubricant?

Characteristics and features of lubricants for angle grinder

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 can cause chipping of the moving parts of the mechanism.
  • The temperature at which the lubricant becomes liquid must be over 120 degrees.
  • The oil should not absorb moisture, should form a strong film that protects parts from corrosion.
  • And also, most importantly, the oil must be of such a viscosity so that it can hold onto moving parts.

The consistency or viscosity of greases is classified according to the NLGI (National Lubricating Grease Institute), and in certain cases it is necessary to use an oil of a certain density. The viscosity of the oil is selected depending on the speed of the gearbox, the higher it is, the more liquid 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. NLGI-2 grease which is soft.
  • Lightweight rotary hammers and impact drills. NLGI-1 grade, very soft in consistency.
  • angle grinder, circular saws, lawn mowers. NLGI-0 grade, semi-liquid in consistency.
  • Heavy rock drills, jackhammers. NLGI-00 class, liquid in consistency.

The control

Having studied how to lubricate the gearbox of the angle grinder. a procedure for monitoring the correct maintenance of the tool should be considered. The angle grinder must be assembled and plugged in. When starting the motor, the quality of filling the gearbox with grease is assessed. To do this, the angle grinder is put in idle mode for a short time.

If the gearbox begins to heat up after the test, and traces of grease appear from the gaskets, then there is too much substance in the mechanism. After disconnecting the tool from the mains, it is necessary to open the gear cover. Excess oil will be observed on the walls. They are removed from the equipment cavity.

If extraneous noises appeared in the test mode, insufficient lubrication was applied. In this case, the tool is disassembled, and an additional amount of the composition is introduced into the gearbox. Then the verification procedure is repeated. If everything is in order, the tool can be used normally.

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Having considered how to lubricate the gearbox of an angle grinder, as well as the procedure for this process, each master will be able to service his equipment independently without any problems.

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.

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.

What is the lubricant in the gearbox

An angle grinder (angle grinder) is called simply an angle grinder. With this tool, wizards perform many operations. It, like any other equipment, requires full service. Moving parts need lubrication. For this, special means are used.

There are several options for how to lubricate the angle grinder gearbox. The advice of experienced craftsmen will help you choose the best way. the angle grinder will work for a long time and efficiently.

Preparing for a grease change

Having studied the options, how to anoint the gearbox of the angle grinder. it is necessary to understand the process of applying a new composition to the elements of the mechanism. Follow the manufacturer’s power tool maintenance plan for this procedure. This must also be done when replacing gearbox parts or rotor bearings.

The processing will have a dirty color. This is due to the ingress of metal and dust particles into it. Before lubricating the gearbox, it is necessary to remove the old oil from the surfaces of the mechanisms. The working off is removed completely.

Automotive cleaning products are suitable for this procedure. You can also use kerosene or gasoline. With the help of these means, traces of old grease are completely removed from the surfaces of all parts. After processing, the gearbox must be thoroughly dried. Only then can you start refueling.

How much grease is required to replace

The required amount of lubricant for an angle grinder is assigned taking into account the complete coverage of the helical teeth of the gears. Excess material will be squeezed out of the housing, and too little will not be able to ensure the correct functioning of the gearbox.

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.

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.

Signs of grease aging

Interested in how to properly lubricate the gearbox in an angle grinder, it is necessary to consider the signs of grease obsolescence. If the technician disconnects the gearbox from the angle grinder and looks inside, he may see clear signs of the need to change the composition.

During operation of the unit, lubricant splashes and settles in a dense layer on the inner walls of the housing. Over time, the substance dries up. This creates lumps. This indicates the need to change the lubricant.

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As the temperature rises, the lubricant becomes more fluid. It can spread out leaving the gear mechanism. To prevent friction, the amount must be controlled. If there is no thick layer of grease on the gears, then it’s time to change it. Otherwise, the tool will quickly fail.

The control

Having studied how to lubricate the gearbox of an angle grinder, you should consider the procedure for monitoring the correct maintenance of the tool. The angle grinder must be assembled and plugged in. When starting the motor, the quality of filling the gearbox with grease is assessed. To do this, the angle grinder is put in idle mode for a short time.

If the gearbox begins to heat up after the test, and traces of grease appear from the gaskets, then there is too much substance in the mechanism. After disconnecting the tool from the mains, it is necessary to open the gear cover. Excess oil will be observed on the walls. They are removed from the equipment cavity.

If extraneous noises appeared in the test mode, insufficient lubrication was applied. In this case, the tool is disassembled, and an additional amount of the composition is introduced into the gearbox. Then the verification procedure is repeated. If everything is in order, the tool can be used normally.

Having considered how to lubricate the gearbox of an angle grinder, as well as the procedure for this process, each master will be able to service his equipment independently without any problems.

How to lubricate the inside of the angle grinder. How to lubricate the gearbox of the angle grinder? Useful tips, recommendations of masters

Lubrication process

It is better to apply lubricant in a special room. You can contact the wizard, or you can do all the steps yourself. First you need to disassemble the angle grinder and remove the layer of the old lubricant product. The elements should not have old coating. The step-by-step recommendations for lubricating the mechanism include the steps:

  • Disassemble the tool.
  • Using kerosene, gasoline, carefully wash all parts of the gearbox and remove old grease.
  • Dry elements.
  • Open the container with grease, stir the composition.
  • Place on bearings and place in cavity.
  • Collect all parts.

Often, users wonder how much lubricant they need. The use of a significant amount of the substance will cause it to leak out of the gear housing during operation. Later on, the angle grinder may suddenly break. You need to take substances in the amount of half the volume of the reducer.

When to lubricate the gearbox

The manufacturers of the angle grinder do not set the frequency of lubrication, nor any special terms. Therefore, it is necessary to constantly monitor the condition of the device, to notice the following signs of lack or lack of lubrication:

  • The appearance of traces of lubricant on the body. With heavy use, the gearbox heats up, which makes the lubricant thinner. If a leak is found, the cause must be determined immediately and all parts must be reprocessed.
  • Lumps of grease inside the gearbox. The problem stems from the fact that the protective coating during operation of the angle grinder is sprayed on all internal surfaces of the case and dries up. Extraneous sounds, crackling, strong sparking will help to detect it without disassembling the device.

Lubrication is mandatory after repair or replacement of gears, bearings, other parts of the mechanical part of the angle grinder.

How and how to lubricate the angle grinder. Lubricant for everlasting operation of an angle grinder.

Checking the accuracy of the application

Angle grinder grease, namely its abundance, is checked in idle mode during a test run for a short period of time. After starting, the gearbox starts to warm up. If part of the lubricant flows out when the gearbox is warmed up, then it is necessary to disassemble the tool again and remove the excess.

If, as a result of a short period of idle operation, signs of noise or rattling appear, then the volume of the applied layer must be increased.