What is the best lubricant for the gearbox angle grinder

How to properly remove old grease in an angle grinder

Old grease is always removed completely, regardless of its color. There should be no traces of old grease on the parts, and there should be 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.

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.

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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.

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.

Lubricants of domestic manufacturers for bearings and gearboxes angle grinder

With the rise in for foreign lubricants, the lubricants of domestic manufacturers are especially in demand.

Russian lubricant manufacturers have learned to produce high-quality lubricants suitable for any tool.

Lubricants have been developed for gearboxes of grinders, perforators, drills.

The most popular products are Nanotech Metal Plak Electra. The range of lubricants produced by this company allows you to select the lubricant required for each unit

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.

Main Features of Lubricant for Angle Grinder

In angle grinders, the main unit that is subjected to the greatest loads during operation is a gearbox consisting of helical gears.

The torque generated by the angle grinder rotor is transmitted from the rotor to the working tool through the small helical gear to the large helical gear. Correctly selected gear lubricant significantly reduces frictional force and heating temperature.

The grinder uses bearings that also require periodic lubrication. This is especially true for the spindle bearing of the large helical gear.

A lubricant is suitable that meets not only the listed requirements, but also environmentally friendly.

Lubricants for an angle grinder must have certain characteristics and must be of the required consistency in terms of properties.

The lubricant for the gearbox of the angle grinder must have:

  • viscosity no more than 800 Pa s;
  • dropping point not less than 120 ° С;
  • ultimate strength not less than 120 Pa.

Lubricant for an angle grinder should not have mechanical impurities, be resistant to corrosion, adhere firmly to lubricated parts, not melt at high temperatures, prevent the formation of scoring at the contact points of parts and, of course, have water-repellent properties.

In an angle grinder of any company, two types of plain bearings are used: bearings for an electric motor and support bearings for a gearbox.

The selection of grease for the bearings of an electric motor is different from the selection of grease for the gearbox bearing. It’s all about different working conditions.

Lubricants recommended by foreign tool manufacturers

Foreign tool manufacturers, including the angle grinder, recommend specially formulated ointments as lubricants for the angle grinder.

One of the most widespread foreign lubricants is a grease marked MoS2 NLGI 2 ISOL-XBCHB 2 DIN 51825-KPF 2 K-20.

  • MoS2. indicates the filler material, in this case molybdenum;
  • NLGI2. indicates the second viscosity grade;
  • ISOL-XBCHB 2. belonging to ISO standards;
  • DIN 51825-KPF 2 K-20. the grease is made according to German DIN standards;
  • The numbers 51825 mean that the grease is type K.

Lubricants produced with such characteristics are quite expensive. There are imported, less expensive lubricants on the Russian market.

Each tool manufacturer, be it Bosch, Makita, Hitachi, DeWalt, Metabo, RedVerg, Interskol, E256, LEPSE, recommends its own lubricants. This is the manufacturer’s policy. They insist that when performing maintenance, the lubricants specified in the instructions are used. over, non-observance of these recommendations does not allow performing warranty repairs.

Gearbox grease for the Makita angle grinder is available in tubes. Its high cost is commensurate with the high quality and long service life.

How much grease should be used when replacing the gearbox angle grinder

If the amount of grease in the bearings is controlled by flowing out from the back, then a certain amount of grease is packed into the gearbox of the angle grinder. 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.

What kind of lubricant is needed for the gearbox angle grinder

Angle grinders (angle grinder) or angle grinders in modern designs allow you to perform complex tasks in the processing of solid materials. This is achieved by increasing the power of the tool and using a high-strength element base. An increase in the number of revolutions also causes an increase in the load on the electric motor. The weakest point of the power plant of such a tool is the gearbox. It is often replaced and repaired even when used in average operating conditions. High-quality lubricant for the gearbox angle grinder allows you to extend the working life of the technical filling, but only if you make the right choice.

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Removing old grease

It will be nice if the old grease is dry and not difficult to remove. In extreme cases, it may be necessary to collect pieces of the composition scattered around the body, but if the product has retained its condition, then you will have to prepare kerosene or gasoline solution. After moistening a napkin or rag, carefully select the entire volume of old grease from the groove. Then repeat the procedure until the surface is completely clean. If grease was used for the gearbox of an angle grinder with a low threshold for thermal endurance, then a hot hair dryer can also be used. It will melt the lubricant to a fluid state. Then it remains only to rinse the gearbox and dry it to apply a new composition.

Alternative lubricants

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.

Gear lubricant manufacturers

Power tool lubricant manufacturers can be classified into two types. First of all, these are directly the manufacturers of tools. They are also engaged in the development of lubricants specifically for their products. These tools include grease for the gearbox angle grinder “Makita” under the index 181490-7. This is a compound specially designed for Japanese-made angle grinders, but of course it can also be used for other brands of angle grinder.

The segment is based on the products of specialized manufacturers of lubricants. Users appreciate Castrol grease. A well-known company produces a special green compound for power tools, which can also be used for the bearing group. A similar lubricant for the angle grinder gearbox is presented in the “Mobile” line. This product is already blue in XHP 222, which comes in cabinets with the shape of a syringe for supplying oil. Many praise the Nanotech lubricant for its budget. The composition is suitable as a periodic maintenance tool for angle grinder used in household work.

Gearbox lubrication tasks

To understand why an angle grinder specifically needs lubrication, you need to figure out how the gearbox works. the most sensitive and at the same time responsible mechanical part of the tool. The gearbox is formed by a whole complex of small elements and parts, which are enclosed in a crankcase. During operation, the gears actively interact with each other in conditions of direct contact with the generation of excess heat. Accordingly, grease for the angle grinder gearbox primarily protects the mechanism from wear, deformation and all kinds of damage. The basic protection effect for such devices is provided by antifriction agents. This function assumes minimization of friction between parts, which increases their resource and generally strengthens technical and physical qualities. In addition, the lubricant must be able to dissipate heat. Some formulations create a cooling effect, but in most cases external thermal protection of the elements is assumed.

Mandatory lubricant characteristics

To perform the above functions, the lubricant must have an appropriate set of characteristics. Among the main parameters by which the capabilities of gear lubricants can be assessed are strength, dropping point and viscosity. The strength characteristic is directly responsible for the anti-friction function. That is, it will determine how much the formed film on the surface of the part can maintain its integrity.

In the question of which lubricant to use for the gearbox of an angle grinder in terms of tensile strength, values ​​of 120-150 Pa can be considered. There are also compositions with a strength of more than 400 Pa, but there is no need for such high indicators, especially since the growth of this parameter inevitably minimizes other important characteristics.

With regard to the limiting dropping point, it is possible to give preference to products designed for 150-180 ° C, although this figure rather depends on the requirements of a particular gearbox. Also with viscosity. Much in the selection of the optimal indicator depends on the recommendations of a particular manufacturer, but most often they advise a viscosity at a level not higher than 800 Pas.

How much grease should be used when replacing the gearbox angle grinder

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

Leave enough grease in the gearbox so that the teeth of the gears are covered.

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

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.

The procedure for applying grease to the gearbox angle grinder

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, then the neck of the tube is pressed against the side bearing cage and squeezed out until it flows out of the back.

Need for lubrication

As with any device with a motor and rotating parts, an angle 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 of the angle 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 gearbox of an angle grinder to ensure optimal tool performance.

How can you lubricate the gearbox angle grinder?

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

Main Features of Lubricant for Angle Grinder

In angle grinders, the main unit subject to the greatest loads during operation is a gearbox consisting of helical gears.

GREASING GEARS IN CHEAP ANGLE GRINDER.

The torque generated by the rotor of the angle grinder is transmitted from the rotor to the working tool through the small helical gear to the large helical gear. Correctly selected lubricant for the gearbox significantly reduces the friction force, heating temperature.

The grinder uses bearings that also require periodic lubrication. This is especially true for the spindle bearing of the large helical gear.

A lubricant that meets not only the listed requirements, but also environmentally friendly.

Lubricants for an angle grinder must have certain characteristics and must be of the required consistency in terms of properties.

The lubricant for the gearbox of the angle grinder must have:

  • viscosity no more than 800 Pa’s;
  • dropping point not less than 120 ° С;
  • ultimate strength not less than 120 Pa.

Lubricant for an angle grinder should not have mechanical impurities, be resistant to corrosion, adhere firmly to lubricated parts, not melt at high temperatures, prevent the formation of scoring at the contact points of parts, have water-repellent properties.

In an angle grinder of any company, two types of plain bearings are used: bearings for an electric motor and support bearings for a gearbox.

The selection of grease for the bearings of an electric motor is different from the selection of grease for the gearbox bearing. It’s all about different working conditions.

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Gearbox grease angle grinder

The grease for the gearbox of the angle grinder differs from the grease for the bearings in the main feature, increased adhesion. It should firmly adhere to the gearbox teeth when it rotates a lot.

In general, the lubrication process of the gearbox in angle grinders occurs due to the fine spray of the lubricant and its suspensions. The gearbox operates as if in oil mist. Therefore, the lubrication requirements for gearboxes are slightly different.

In addition to increased adhesion, the lubricant for gearboxes must have high temperature resistance and not melt at elevated temperatures.

When to change the lubricant in an angle grinder

Lubrication on the angle grinder is changed according to the tool maintenance plan, when replacing failed gearbox parts or rotor bearings.

Old grease is dirty and dark in color. This is due to the ingress of foreign particles of metal or dust into it.

How to lubricate the gearbox angle grinder?

To reduce friction, use an angle grinder lubricant recommended by the manufacturer. As a result, we get a situation familiar to servicing a car in a dealership service station: only the brand indicated in the regulatory book.

While the instrument is under warranty, the service center carries out maintenance exactly on such a recommendation. And what kind of lubricant to use for the gearbox of the angle grinder, if you yourself perform routine maintenance?

Of course, only products bearing the manufacturer’s logo Angle grinder have special markings.

The grease of the same name for an angle grinder is ideal for maintenance, but its cost is usually higher than analogues. For example, grease oils for a car gearbox operate under loads that are many times higher than the operating conditions of an angle grinder.

And the cost of such a product may be lower. In addition, if you have a car, there are probably oils for servicing it. So why buy another tube when you can just use ready-made lubricant.?

For the correct selection, just look at the characteristics and compare them with the requirements for lubrication of an angle grinder:

  • high adhesion, since there is a possibility of centrifugal splashing of grease from the driven gear;
  • water resistance: the angle grinder is often used outdoors, moisture may get into the gearbox;
  • resistance to emulsion formation;
  • high dropping point, high rpm again: heated oil may spray from the working surface;
  • stability of parameters at high temperatures (this characteristic is more important than the ability to work in frost);
  • the ability to bind abrasive particles entering the gear housing.

The latter property is especially true if the angle grinder is used for stone processing. Abrasive dust is a major problem for angle grinder gearboxes and a cause of premature wear.

Therefore, for tools operating in dusty conditions, the lubricant is changed more often, with a complete flushing of the gearbox cavity.

In this video, in detail about what lubricants to service the gearbox of the angle grinder

Why do you need lubrication in the gearbox angle grinder?

From a technical point of view, the angle grinder gearbox is not too complicated. Two gears and shafts:

  • the leading one is located on the shaft of the electric motor, in 90% of cases without transition stages, it is directly connected;
  • the driven one is a crown of teeth connected to the shaft for fastening the working disk.

The shafts rotate in support bearings, which can be with a pressed-in cage (lubricated inside, put in the factory) or with an open cage. In the second case, the lubricant can be changed and put in the process of maintenance.

The gear teeth are in constant mesh and operate at variable speeds and loads. As a result, pressure is generated on both sides of the tooth with the same intensity. If the gearbox and bearings run “dry”, the metal will wear off very quickly, there will be backlash.

Where it leads:

  • At first, the operating noise will increase, which will increase in proportion to wear.
  • Mismatch of teeth can provoke jamming of the gear mechanism.
  • Then, when passing the backlash gap, each time the teeth will hit each other.
  • From overheating caused by increased friction, the metal of the gears will lose strength.
  • The case will end with the breakage of one or more teeth, and the failure of the tool.

Unpleasant ending? And just something, it was necessary to spend a little time and money on the purchase of consumables and lubricate the gearbox of the angle grinder.

In addition to the main task of reducing friction, the lubricant plays the role of a heat-conducting paste. The gears heat up, and only the metal housing of the gearbox can dissipate heat. Since the oil has a high thermal conductivity, the temperature is effectively dissipated on the outer walls of the tool.

Gearbox grease angle grinder. selection, application

Any power tool has a heavily loaded mechanical part, the health of which depends on the performance of the entire device. As a rule, this is a gear reducer, which in an angle grinder (in common parlance. an angle grinder) also changes the angle of the axis of rotation.

Any moving mechanism needs to reduce friction, and the lubricant for the gearbox of the angle grinder also helps to cool the unit.

How to Service the Gearbox Angle Grinder?

The lubrication intervals can be specified in the service manual, but this is a rather arbitrary interval. You will not be able to calculate the number of hours from MOT to MOT.

Therefore, it is recommended to change the lubricant at least once a year with intensive use. over, it is not difficult at all. It is enough to unscrew the 4 bolts on the gearbox housing, remove the old grease and add fresh one. You should not wait for the appearance of extraneous noise. If this happens, it means that the mechanism is already worn out.

Alternative to branded lubricants

If you do not have a suitable automobile lubricant in your garage, and you do not want to spend money on Makita or Bosch (especially since these factories still do not have oil refining capacities), contact well-known universal manufacturers.

Castrol, Mobil or Huskey offer good formulations. Of course, you should not buy a 1-4 kg can, for two or three servings an angle grinder is enough 100-250 ml.

The role of lubricant

The manufacturers of the presented power tools in the manufacture of the tool mechanism provide moving, rubbing parts with a special lubricant. The composition of these products may vary. Therefore, if you are interested in how to lubricate the gearbox of an angle grinder (it is “DeWalt” or another brand), you need to look at the instructions. The manufacturer can clearly define the formulation options that are allowed to be used when servicing equipment.

Under heavy loads in which the equipment has to operate, as well as at high heating temperatures, lubricants prevent premature wear of metal parts.

Special components allow the excess heat to be removed from the rubbing steam. Also, many manufacturers provide for such an important function of their products as anti-corrosion effect. The complexity of the action allows you to ensure the full operation of the tool, extend its operation for many years.

Signs of grease aging

Wondering how to properly lubricate the gearbox in an angle grinder. the signs of grease aging should be considered. 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.

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.

Domestic lubricants

Considering how to smear a domestically produced angle grinder gearbox, it is necessary to pay attention to locally made compositions. Today Russian companies offer a wide range of such products. They are affordable.

Modern domestic materials for lubrication of the gearbox of the angle grinder are characterized by high quality. They meet high foreign standards. They are used not only in angle grinders, but also in other types of power tools.

The products of the Nanotech Metal Plak Electra company are especially popular. However, there are other types of service compositions for any unit of the angle grinder, including the gearbox.

Gearbox maintenance

Having chosen how to lubricate the gearbox of the angle grinder, as well as having prepared the mechanism for this process, you can start servicing the tool. The product must be mixed thoroughly. It is applied in a thin layer to the gearbox parts. The mass is applied to the bearings using the packing method.

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If the product is packaged in a tube, its neck is placed on the side of the bearing cage. The composition is poured inside until it flows out from the other side. The gearbox is filled with enough grease to cover the gear teeth. Excess will flow out during operation of the angle grinder. Lack of lubrication leads to increased heating and friction inside the mechanism.

Experts recommend putting in such an amount of substance that it takes up almost half of the space in the gearbox housing. In this case, the operation of the tool will be correct. The manufacturer may indicate in the operating instructions some of the nuances of this process. They should also be considered when servicing the angle grinder.

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

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.

Foreign lubricants

To determine how you can lubricate the angle grinder gearbox. a number of expert recommendations need to be considered. They argue that you should choose the oil that is produced by the manufacturer of the equipment. Such formulations are not cheap. However, they have a balanced set of additives to ensure long-term performance of your angle grinder. If the user of the equipment purchases other lubricants to service the power tool, the equipment may not even be covered by the warranty.

However, if you wish, you can replace the formulations recommended by the manufacturer with similar products. For foreign models, an angle grinder is quite suitable for products that contain additives identical to those used by the manufacturer of the angle grinder.

If molybdenum was present in the lubricant, it is necessary to purchase a composition labeled MoS2. For angle grinders, which are serviced by consumables of the second viscosity class, the composition NLGI2 is suitable. The ISO standard corresponds to greases marked ISOL-XBCHB 2. If the product was manufactured according to the German quality standards DIN, the new oil must be labeled with the indication DIN 51825-KPF 2 K-20.

Specialist recommendations

Experienced experts give recommendations on the best way to lubricate the angle grinder gearbox. They argue that if it is impossible to service the tool with branded lubricant, you can choose a different composition. The second most popular grease for CV joints is recognized in our country. It is most often used for domestic-made tools. Some masters choose grease for CV joints and for foreign angle grinders. However, the quality of the original formulations will be much higher.

It is worse if the master gave preference to such compositions as lithol or solid oil. These are universal remedies. They are not able to properly service the angle grinder gear system. When using them, the work of the tool will not be able to be complete. At the beginning of operation, the difference will be imperceptible. But over time, serious problems may appear in the operation of the unit.

Therefore, experienced craftsmen do not recommend saving on lubricant for the gearbox. The costs of purchasing original or other high-quality products are paid off by the long service life of the equipment.

How to properly lubricate an angle grinder

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, 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.

Bearing grease phase

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.

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.

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.