For good work, the grinder needs lubricant that will not leak under heavy loads and long work, but will reliably lubricate the part over its entire surface during the entire operating time. It must also be environmentally friendly. Pay attention to well-known and already proven lubricant manufacturers, such as Lubcon, Hammer, Makita, Hitachi. Experts advise, if possible, to choose a lubricant from the same company as your tool.
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 and under all loads. They are highly resistant to oxidation, protect against corrosion, and are easily combined with plastics and elastomers. The composition contains exclusively silicone and lithium thickener, which makes them safe from an environmental point of view. The consistency is maintained at temperatures from -50 to +190 degrees Celsius.
Lubricant for the grinder and its precise markings
One of essential elements grinders are a gearbox. When the tool is working, it becomes very hot, 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 high temperatures; proper lubrication also plays a huge role.
Every specialist, when asked how to lubricate the gearbox of an angle grinder, will answer that it is best to use a special lubricant for angle grinders. It is specifically designed for the work and conditions in which this tool is used. This lubricant has a specific Blue colour. A good, high-quality lubricant for an angle grinder gearbox has the following marking: 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 class;
- ISOL-XBCHB 2 – compliance with ISO standards;
- DIN 51825-KPF 2 K-20 is the most important point, it means that the lubricant complies with German DIN standards.
- 51825 indicates that the material corresponds to Type K grease.
The price for such a mixture is very high, but there is a cheaper lubricant with similar qualities: KPF 2 K-20, where:
- K – intended for plain bearings;
- R – with extreme pressure additives;
- F - with solid filler;
- 2 – consistency corresponds to NLGI;
- K – maximum operating temperature +120 degrees Celsius;
- 20 – minimum temperature work.
Note! The use of special lubricants for angle grinders will provide the maximum guarantee of reliable operation.
About tools under warranty
Particular attention should be paid to lubrication of angle grinders that are under warranty. It is not recommended to do this yourself; this work should be entrusted to specialized workshops. High-quality and original materials with the correct dosage will be used there. At home, you can apply the mixture incorrectly, which will negatively affect the longevity of the tool.
Various lithols and solid oils for lubricating gears and bearings are strictly prohibited. In addition, opening the case on warranty instruments will be a reason for refusal of service, and the use of “unauthorized” lubricant is generally a gross violation of the rules for operating an angle grinder. The only exceptions are external nodes, which, according to the instructions, must be processed regularly.
Lubricant for a rotary hammer allows you to extend its service life and make its use more efficient. In order for the effect of a lubricant to bring the expected results, when choosing it, you should take into account not only the characteristics of the lubricant, but also technical specifications device for which it is planned to be used. When choosing how to lubricate a hammer drill, you must also keep in mind the fact that various parts of such equipment need different types lubricant.
There is an opinion that the presence of lubricant on the moving elements of the hammer allows you to postpone its replacement for a long time. Meanwhile, this opinion is fundamentally wrong, and in order to change it, it is enough to get acquainted with the principle by which lubricants work.
Why do hammer drill elements need lubrication?
Lubricant, including that used for a hammer drill, is a viscous substance, the use of which is necessary to reduce the coefficient of friction between structural elements of a mechanical device moving relative to each other. Thus, lubricant only reduces friction, but does not eliminate it completely, so the lubricating composition is gradually saturated with wear products of rubbing parts - metal dust. As a result, not only does the viscosity of the lubricant change, but it itself becomes the cause of more intensive wear of the equipment.
It should immediately be noted that it is viscosity that is most important parameter, which you need to focus on when choosing a lubricating composition of a certain type.
How to choose the right lubricant for a specific hammer drill model? First of all, you need to take into account the recommendations of the equipment manufacturer, who must indicate both the required type of lubricant and the frequency of its replacement. It is especially important to focus on such recommendations while the warranty period for the hammer drill has not yet expired. Otherwise, if the device breaks down, you will not be able to take advantage of the manufacturer’s warranty.
Many owners of rotary hammers, after the warranty period has expired, begin to use not branded compounds for lubrication, but their cheaper analogues - litol or grease. Of course, such lubricants are not capable of harming the structural elements of the hammer drill, but when using them, you should keep in mind that they should be replaced much more often.
Gearbox lubrication
The rotary hammer gearbox is the most complex design component of the device, so it requires special attention. Lubricating the rotary hammer gearbox is not so difficult, but self-assembly a previously disassembled unit can cause serious difficulties. If the hammer drill is still under warranty, then with questions about lubrication of its gearbox, it is best to contact a specialized workshop that provides warranty service for such equipment.
If the hammer drill you own is not covered by any warranty or the warranty period for your equipment has already expired, and the authorized service center located far enough away, you can lubricate the gearbox yourself, observing maximum care and attention. For this you will need:
- a set of plumbing tools with which you will assemble and disassemble the hammer drill gearbox;
- clean rags;
- the composition itself for lubrication.
“Native” lubricant for the Makita P-08361 gearbox. Refilled during initial assembly of the tool and recommended for Maintenance
It is better if the lubricant is a branded product specifically designed for equipment of a certain type. trademark. So, it can be lubricant for a Makita hammer drill or lubricant for a Bosch hammer drill. If you don’t have a branded lubricant and you can’t buy it, you can use inexpensive domestic lubricants.
It is very important that you have instructions for the hammer drill that you are going to lubricate. Naturally, if you own a Makita or Bosch rotary hammer, this should be an instruction manual for the equipment of these particular brands.
After carefully studying the instructions for the hammer drill, you can begin the procedure for lubricating its gearbox.
- Before disassembling, the hammer drill should be thoroughly cleaned of dust.
- When disassembling the gearbox, it is advisable to immediately remember how its structural elements are located in it. It should be borne in mind that it is not recommended to disassemble and lubricate the gearbox immediately after finishing using the hammer drill. This is explained by the fact that still hot gearbox parts, when exposed to a cold lubricant, may lose their physical characteristics.
- After all components of the gearbox are removed from its housing, they should be thoroughly washed with gasoline or spindle oil and wiped dry.
- Inner part The gear housing also needs to be washed, wiped (as far as possible) and allowed to dry completely.
- When disassembling the hammer drill gearbox, you can pay attention to the fact that there is no lubrication on some elements of its design. This only means that such parts do not require lubrication and there is no need to apply it to them.
- As mentioned above, it is better to use a branded lubricant for the gearbox of a drill or hammer drill, which has a number of advantages. In particular, branded lubricants retain their original characteristics much longer, so they can be used much less frequently. In addition, the proprietary lubricating composition has the following important quality like water resistance, so it effectively protects metal parts hammer drill from moisture and, accordingly, from corrosion. As a good alternative to branded lubricants for the gearbox of a rotary hammer or drill, you can use Metabo oil, the cost of which is quite affordable.
- After lubricating all elements, the gearbox must be carefully reassembled, observing the reverse sequence.
Caring for a hammer drill includes not only lubricating its gearbox, but also applying a lubricating compound to the shank of the drill used.
Before performing this procedure, the tool shank should be thoroughly cleaned. After this, a special lubricant for hammer drills or regular lithol is usually used. In addition, if hammer drills have a chuck open type, it is advisable to first wipe and treat its oil seal, which will provide more reliable protection the inside of the device from dust getting into it.
Causes of equipment overheating
Many home craftsmen have a question about how to use a hammer drill so that its gear housing does not overheat. First of all, you should find out the reason for the excessive heating. One of these reasons may be too much lubricant in the internal part of the gearbox, which also negatively affects the performance of the device.
The reason for the intense heating of the rotary hammer gearbox may be that it internal details Insufficient amount of lubricant is supplied. This can happen in cases where the hammer drill is used for too long in the chiselling mode.
Another common reason for the device to overheat is that the holes through which cooling air flows to the hammer drill motor are clogged. In such cases, it is necessary to thoroughly clean the rotary hammer from dust and switch it to normal drilling mode for a while. When operating in this gentle mode for about half an hour, the temperature of the gearbox housing should decrease.
With proper care of the technical condition of the rotary hammer and compliance with all recommendations for its use, the gear housing should not overheat under any operating conditions.
Proper care of a drill with a hammer drill function
A hammer drill is a hybrid of two types of equipment used to create holes in various materials. Unlike a classic hammer drill, this drill has some design flaws, which makes its maintenance more difficult and not very convenient. Such disadvantages include, in particular:
- lack of a special container into which the lubricant is poured;
- the difficulty of servicing the cartridge due to the peculiarities of its structure.
The main care for a drill with hammer drill functions is that after each use, the drill of such equipment (including the tail section) must be thoroughly cleaned of drilling waste, and before inserting such a tool into the drill, a small amount should be applied to its shank lubricants (you can use regular grease). If the amount of lubricant on the shank is excessive, this will not harm the tool itself or the equipment used, but may negatively affect appearance surface you are drilling, as excess lubricant will spray out of the rotating chuck.
As a rule, drills that have the functions of a hammer drill are purchased for household use, since their price is quite affordable, and with their functions when performing simple repair work They do a pretty good job around the house. Despite the fact that these power tools differ in the features mentioned above, caring for a hammer drill does not take much time and does not cause problems even for not very experienced users.
Lubricant selection
Before dealing with the question of how to lubricate a hammer drill, you should become familiar with the means that can be used to carry out such a procedure. As a rule, the manufacturer indicates the type or brand of lubricant that is optimally suited to the equipment of a certain model. In any case, such instructions are in the instructions for hammer drills produced under reputable brands. If there are no such recommendations, you can ask the consultant in the store what kind of lubricant is for the hammer drill you are purchasing. fits better Total.
A universal and relatively inexpensive lubricant that can be used for most modern models rotary hammers, is the oil poured into diesel engines. Compositions based on graphite are actively and quite successfully used to lubricate hammer drills. Such compositions, in particular, are used to lubricate open-type worm gears.
Electromechanical manual construction tool household and industrial use with replaceable nozzles. 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 angle grinders produced in the Bulgarian city of Plovdiv, which is where their name came from, used in Russia to designate of this instrument in colloquial speech.
The Bulgarian instantly gained immense popularity. Since, certain types of work before its appearance required significant application of both physical effort and several types of tools to perform one type of operation.
Being, at its core, a universal device for cutting products and materials of various hardness groups, as well as rough abrasive and grinding, an angle grinder easily performs the following types of operations:
- Cutting of ferrous and non-ferrous metals;
- Sawing of reinforced concrete, natural and artificial stone, ceramics and other materials of this group;
- By replacing the saw attachment with a corresponding disk, you can saw with a grinder wooden crafts and lumber from tree species of different structure.
The angle grinder is also used for the following work after sawing:
- Removing scale and paint from metal and wooden surfaces;
- Removing burrs resulting from sawing materials;
- Fine grinding and finishing of planes and hard-to-reach places.
Technical device of an angle grinder
The design of an angle grinder consists of the following elements:
- Housings made of metal or plastic;
- Gearbox and its housing made of aluminum alloys;
- Wheel for adjusting the number of rotations;
- Start buttons;
- Locking buttons for quick change of attachments;
- Working circle clamping nut;
- Protective cover of the disk and handle with variable position on the body;
- Electrical cables.
Preventive maintenance of grinder parts and mechanisms
In connection with the work performed, in which the occurrence of stone, wood and metal dust inevitably, like its getting into the body of the angle grinder and settling on the moving mechanical parts of the gearbox, the angle grinder needs periodic preventive inspection and comes down to the following actions:
- Removing dust and larger pieces of debris from the gearbox housing;
- Check the presence of grease in the bearings and gears, as well as the integrity of the graphite brushes and replace them if necessary.
Lubricant for the gearbox of the Makita grinder (Bosch)
Due to the fact that the grinder is a high-speed, powerful tool that gets very hot during operation, the question of what lubricant to use for the grinder gearbox is very important. We would like to immediately highlight the types of lubricants, the use of which for the gearbox (bearings and gears) of an angle grinder is not recommended by experts. This:
- grease;
- lithol.
When choosing which lubricant to lubricate the gearbox of an angle grinder, it is worth listening to the opinions of professionals who repair them or simply long-time users of this tool. Although their opinions will be far from unambiguous.
Thus, CV joint lubricants, widely known among car enthusiasts, are equally persistently both recommended and rejected by experts. Moreover, both sides present quite convincing arguments for and against the use of CV joints.
We can say with confidence that the lubricant for the gearbox of an angle grinder must meet the following requirements:
- Be heat-resistant and not leak from the gearbox as it heats up;
- Increase glide;
- Reduce the friction force between contacting moving elements of parts;
- Evenly redistribute the heat load while simultaneously performing cooling functions;
- Protect metal parts from corrosion and penetration of dirt and dust into the mechanism.
As expected, tool manufacturers advise using only their own spare parts (brushes) and lubricants.
So, according to Bosch specialists, the lubricant for the Bosch angle grinder gearbox should be produced by this particular brand. Moreover, it can be successfully used to lubricate gearboxes of angle grinders and other manufacturers. Representatives of Makita, Hitachi, and so on completely disagree with this. There is no doubt that branded lubricants are of very high quality and meet all the stated parameters. If not for one thing.
The cost of a can of Makita or Bosch lubricant (really branded, not a Chinese fake) is comparable to an average-level Asian-made grinder, which, of course, is very expensive. Naturally, the service life of the device directly depends on what kind of lubricant is in the grinder gearbox. But in the modern market of lubricants, you can choose a lubricant that is more affordable and, what is equally important, is not inferior in quality to foreign analogues.
Lubricate the Makita and Bosch angle grinder gearbox with your own hands
An action that does not require special effort and costs. It is produced according to the following scheme.
- According to the instructions, we disassemble the grinder into its component parts.
- Open the gearbox housing.
- We remove dirt and dust, as well as remnants of previous lubricant.
- We distribute the new lubricant evenly throughout the gearbox.
- We bring the grinder to its original state.
- We start the engine at idle speed for a while to warm up the lubricant and distribute it evenly over all parts.
Video instructions for replacing grease in corners sanding machine Makita company.
Any power tool contains rotating parts in its design that are subject to increased wear as a result of friction. It is possible to prevent their premature destruction and extend the service life of the tool if you carry out timely preventative maintenance of rubbing parts. In an angle grinder, the main wear and tear is reducer gears. The harmful effects of friction can be reduced by applying lubricants to the surface of parts. Let's consider which lubricant for an angle grinder gearbox is best to buy.
With intense daily use grinders, changing the lubricant in the gearbox should be carried out at least once a year. Often users do not adhere to certain deadlines preventive maintenance of the tool, and routine maintenance is carried out after the appearance of extraneous sounds during operation. This is absolutely not correct method Gearbox maintenance.
A grinding noise during rotation or rattling indicates that wear has formed on the gears and they will soon have to be replaced.
Preventative inspection of the gearbox begins with separating its casing from the rest of the angle grinder. To do this, simply unscrew the four mounting screws.
The next photo shows that there is grease in the case, but it has collected on one side of the case, and there is not enough of it.
This happens because the angle grinder (angle grinder) is working at high speeds. Under the influence of centrifugal force, oil particles tend to move away from the axis of rotation. During prolonged operation, the surfaces of the gears become completely dry, and without lubrication the metal wears off. In this case, it is enough to lubricate the gear teeth with the existing composition, then close the gearbox and work until the next maintenance.
You can often notice in the gearbox grains of oil mixed with dust. During operation, the grinder heats up, and these grains are sintered, solid particles interfere with the operation of the mechanism. This lubricant must be replaced.
How to lubricate the gearbox
The choice of lubricant for the gearbox has some features. The rotation speed of the angle grinder is high, liquid oil will simply fly away from the rotating parts. The thick composition must withstand fairly high temperatures and don't get baked.
Ready-made lubricant
Manufacturers of power tools advise using special compounds of their own production. Such recommendations are given, in particular, by Makita and Bosch.
You can buy such products, but their cost is quite high, and the costs are not always justified. Firm "Interskol" more democratic in the type of materials used. Which lubricant is best? The lubricant for the grinder gearbox must meet certain requirements:
- the viscosity of the composition does not exceed 800 Pa*s;
- temperature of separation of drops from the main mass is not less than 120°C;
- homogeneous composition without the presence of mechanical inclusions;
- resistance to moisture.
The industry produces many types of lubricants, including special formulations for use in gearboxes. Best results show mixtures containing molybdenum disulfide as an extreme pressure additive. If we talk about foreign manufacturers, Castrol and Mobil have proven themselves to be excellent.
For ease of use, Mobil places its products in syringe-shaped tubes.
Domestic brands include MS-1000 and Limol. The use of grease, lithol or Tsiatim-221 does not give the desired result.
Homemade mixtures
If the required lubricant is not available for sale or if the user considers the price of the product to be unreasonably high, you can try to make the lubricant mixture yourself. There are several formulations using different bases. One of them is common
Transmission oil TAD-17 is added to the container with Tsiatim. Continuously stirring, add oil one drop at a time until the required consistency is achieved. The mixture should adhere well to the parts, not be too thick and not flow like liquid oil.
Another base can be CV joint lubricant in combination with MS-20 liquid oil.
How to lubricate the gearbox
It is not advisable to add the missing amount of oil to the gearbox housing: mixing occurs good composition with the already used one, and the new lubricant loses effectiveness faster. Therefore, when the gearbox casing and its housing and the cover are removed, the remaining old lubricant is removed. First, use a dry rag, and then wash away the traces with gasoline or kerosene. After the parts have dried, new lubricant is applied to them, and the gear housing is filled with lubricant by 2/3 of its volume.
After assembling the grinder, its shaft is rotated several times by hand to distribute the oil evenly. The rotation should be uniform, without jerking or jamming. After making sure that everything is fine, plug the device into the network and get to work. With timely maintenance, the tool will last for a long time.
Angle grinders (angle grinders), popularly called grinders, are widely used among tinkerers. With their help House master can not only perform grinding work, but also cut metal, plastic, stone. Angle grinders are produced by various manufacturers, including domestic ones.
An angle grinder is a reliable tool that can work in correct operation and timely replacement of lubricant and carbon brushes over a long period of time.
Correctly selected lubricant for an angle grinder not only extends the service life of the tool, but also improves performance characteristics.
Knowing the rules for choosing a lubricant for an angle grinder or preparing it yourself, you can perform maintenance without contacting service departments.
Main characteristics of lubricant for angle grinders
In angle grinders, the main unit that is subject to the greatest loads during operation is the gearbox, consisting of helical gears.
The torque created 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 and heating temperature.
The grinder uses bearings, which also require periodic lubrication. This is especially true for the spindle support bearing of the large helical gear.
A suitable lubricant is one that not only meets the listed requirements, but is also environmentally friendly.
Lubricants for angle grinders must have certain characteristics and must be of the required consistency in terms of properties.
Lubricant for an angle grinder gearbox must have:
- viscosity no more than 800 Pa’s;
- dropping temperature not less than +120ºС;
- tensile strength of at least 120 Pa.
Lubricant for angle grinders should not have mechanical impurities, be resistant to corrosion, firmly adhere to lubricated parts, not melt at high temperatures, prevent the formation of scuffing at the points of contact of parts, and have water-repellent properties.
An angle grinder from any company uses two types of plain bearings: bearings for the electric motor and support bearings for the gearbox.
The selection of lubricant for electric motor bearings differs from the selection of lubricant for a gearbox bearing. It's all about different conditions work.
Foreign tool manufacturers, including angle grinders, recommend specially developed ointments as lubricants for angle grinders.
One of the most common foreign lubricants is the lubricant marked MoS2 NLGI 2 ISOL-XBCHB 2 DIN 51825-KPF 2 K-20.
Let's decipher the marking:
- MoS2 – indicates the filler material, in this case molybdenum;
- NLGI2 - indicates the second viscosity class;
- ISOL-XBCHB 2 – belonging to ISO standards;
- DIN 51825-KPF 2 K-20 – lubricant manufactured according to German DIN standards;
- The numbers 51825 mean that the lubricant is type K.
Lubricants produced with such characteristics are quite expensive. On Russian market imported, less expensive lubricants are present.
Every 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 must be used. Moreover, failure to comply with these recommendations does not allow warranty repairs to be performed.
Lubricant for the Makita angle grinder gearbox is available in tubes. Her high price proportionate high quality and long working life.
Lubricants from domestic manufacturers for bearings and gearboxes of angle grinders
With rising prices for foreign lubricants, lubricants from domestic manufacturers have become 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, hammer drills, and drills.
Nanotech Metal Plak Electra products are especially popular. The range of lubricants produced by this company allows you to select the right lubricant for each unit.
Lubricant for angle grinder bearings
Three bearings are installed in the design of the angle grinder. Two bearings are mounted on the tool rotor, one bearing is mounted on the shaft of the driven helical gear of a larger diameter.
Angler grinders use bearings that are already filled with lubricant. But due to improper use or overheating of the tool, the lubricant leaks out.
How to choose the right lubricant for grinder bearings?
Bearing lubricant must meet the following requirements:
- increase sliding;
- reduce friction between components details;
- distribute heat evenly and act as a coolant;
- prevent corrosion;
- protect from dirt and dust getting inside;
- work in the required temperature range up to +150C;
The operating conditions of electric motor bearings differ from the operating conditions of the gearbox bearing not only due to temperature requirements, but also operating modes, load conditions, frequency and rotation speed.
Lubricant for electric motor bearings must have protective properties that prevent dirt, dust, and moisture from entering the bearing parts.
The Russian market offers a wide range of foreign lubricants intended for bearings operating in different conditions. But their cost forces us to look for cheaper, domestic lubricants that are not inferior in quality.
Possessing high water-repellent properties, they have a wide temperature range. The role of a thickener in them is performed by organic and inorganic substances. For sealed bearings, it is best to use lubricants CIATIM-203, VNIINP-242.
From pigment lubricants For electric motor bearings, blue grease VNIIMP-246 and dark purple ointment VNIINP-235 have become widespread. The first lubricant is less common than the second due to its high price.
In today's Russian market, domestic manufacturers of lubricants are widely represented.
Lubricant for angle grinder gearbox
The grease for the grinder gearbox is different from the grease for the bearings. main feature, increased adhesion. It should hold firmly on the gear teeth when it rotates at high speeds.
In general, the process of lubrication of the gearbox in angle grinders occurs due to fine splashing of the lubricant and its suspensions. The gearbox operates as if in an oil mist. Therefore, the lubrication requirements for gearboxes are somewhat different.
In addition to increased adhesion, gear lubricant must have high heat resistance and not melt at elevated temperatures.
Do-it-yourself grease for the grinder gearbox
The listed domestically produced lubricants, although affordable, 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 specifications lubricants for angle grinder gearboxes are presented above, then they can be taken as the basis for creating a lubricant with the required characteristics with your own hands.
The basis of a homemade lubricant for gearboxes should be a lubricant with high adhesion. It must hold tightly to the contacting parts.
Grease for CV joints has increased adhesion. A CV joint is a joint in a front-wheel drive car that operates under conditions of increased dirt, shock loads, temperature fluctuations and humidity.
Taking the lubricant for CV joints as a basis, it is necessary to add liquid lubricant (MS-20) to give the mass the desired consistency. MS-20 oil should be added drop by drop, thoroughly kneading the mixture using a homemade mixer.
Good results are obtained from a mixture of Ciatim-221 and TAD-17 lubricants, where the base is Ciatim.
The correct process for packing lubricant into angle grinders
Packing lubricant into the components of an angle grinder has its own rules. You need to know not only the order in which it is applied, but also how much and where to place it.
When to change the grease in an angle grinder
The lubrication on the angle grinder changes according to the tool maintenance plan, when replacing failed gearbox parts or rotor bearings.
Old grease is dirty dark color. This occurs due to the ingress of foreign metal particles or dust into it.
How to properly remove old grease from an angle grinder
Old grease is always completely removed, regardless of its color. There should be no traces of old grease on the parts, and there should be no particles of destroyed parts in the cavities of the body.
To remove old grease, you can use various washing liquids 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.
The procedure for applying lubricant to the grinder gearbox
Before application, the new lubricant is thoroughly mixed and applied in a thin layer. Lubricant is applied to the bearings by packing. If the lubricant is in a plastic tube, then the neck of the tube is placed against the side cage of the bearing and squeezed out until it flows out. reverse side.
How much lubricant should be used when replacing an angle grinder gearbox?
If the amount of lubricant in the bearings is controlled by flowing out from the reverse side, then a certain amount of lubricant is filled into the angle grinder gearbox. Excess lubricant will leak out during operation. A small amount of it will not ensure high-quality operation of the gearbox.
Leave enough lubricant in the gearbox to cover the gear teeth.
As a guide, apply enough lubricant so that it occupies slightly less than half the volume of the gearbox cavity.
Checking the correct application of lubricant to the angle grinder gearbox
The volume of lubricant packed into the gearbox is controlled test switching on assembled grinder for a short time at idle.
If the gearbox begins to heat up and traces of lubricant leakage appear from the seals and gaskets, then the conclusion is clear. You have transferred the lubricant. Open the gear housing and remove excess lubricant. All excess lubricant will be placed on the gear housing covers. An insufficient amount of lubricant in the gearbox is determined by increased operating noise of the gearbox.
During long-term operation of an angle grinder, the lubricant in the gearbox is distributed on the walls of the housing and loses its properties due to external influences.
After opening the gearbox cover, carefully inspect the condition of the lubricant and 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 gearbox area or on the housing indicates that the time has come to change the lubricant.
Video of grinder repair
Video: Repairing the Sparky 125 angle grinder / Repairing the SPARKY 850 / Grinder jammed \ maintenance of the power tool