Makita Trimmer Gear Lubricant

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.

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, gear lubricants must be highly heat resistant and not melt at elevated temperatures.

makita, trimmer, gear, lubricant

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.

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.

Choosing a lubricant for an angle grinder or the better to lubricate the gearbox

Angle grinders (angle grinder), popularly called angle grinders, are widespread among lovers of tinkering. With their help, the home craftsman can not only perform grinding work, but also cut metal, plastic, stone. Angle grinders are produced by various manufacturers, including domestic.

The angle grinder is a reliable tool that can work, with proper operation and timely replacement of lubricants and carbon brushes, for a long time.

Correctly selected angle grinder lubricant not only extends tool life, but also improves performance.

Knowing the rules for choosing a lubricant for an angle grinder or making it with your own hands, you can perform maintenance without contacting service.

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.

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.

See also  How to Disassemble a Makita Hr2450 Hammer Video

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.

How and what to lubricate a rotary hammer: lubricants for 6 brands

The puncher will come in handy if you need to make a hole in the wall, grind a “track” under the wires and for other construction issues. The tool will faithfully serve its owner, if you do not forget to take care of it.

Elements such as a drill, a reducer, a cartridge require periodic processing with special equipment. How and with what to lubricate various types of rock drills? Here are the answers and nuances of processing electric devices produced by 6 well-known brands.

What parts and how to lubricate?

To begin with, it is worthwhile to understand that one lubricant, no matter how versatile it is, cannot indiscriminately process all the details. One type of lubricant is suitable only for the gearbox, the other for drills and drill bits. Each unit, such as the PBH 2100 RE or GBH 2-24 DRE, is supplied with an instruction manual that describes the lubrication frequency of the parts.

Before starting the lubrication procedure, the power tool must be cleaned and blown out, and then wiped dry.

What and how to process:

  • Reducer. To the question: what is it worth to lubricate the gearbox of a household or professional puncher, the answer is as follows. with a composition in the form of liquid oil. The substance is simply poured in certain quantities into a specially designated place in the shell of the device. Oil fills the gearbox housing, and during operation, all of its parts are covered with a uniform layer of grease. If there is no special hole in the power tool and you need to disassemble it in order to lubricate the gearbox, it is better to contact a specialist.
  • Boer. It must be lubricated before each installation in the chuck. How to lubricate a hammer drill bit? All grooves of the nozzle are processed with a small amount of the agent. The instructions for the devices usually indicate the type and amount of lubricant with which the drill can be processed.
  • Cartridge. The ponytails of the replacement drill bits should also be machined each time before installation. The amount of the drug should be strictly the same as indicated in the instructions, no more and no less. How and with what to lubricate the punch chuck (a special attachment that is used to securely hold the drill), for example, HR2470 or any other? The drilling lubricant simply needs to be applied to the tail of the drill and then inserted into the socket of the chuck. And after removing the nozzle, it must be cleaned of dust and recycled oil.

And how to lubricate the piston of a perforator? Each manufacturer has its own piston lubricant. It is best to use the original.

How to service trimmer head, how to lubricated trimmer head to prevent wear and damage

Elements that do not require sliding during operation (transfer clutch, core, firing pin, cylinder) do not need to be lubricated.

Design features

Such power tools are barrel and straight, mechanical and pneumatic, and depending on the size. light, medium and heavy.

  • core;
  • Boer;
  • firing pin;
  • piston;
  • cylinder;
  • electromagnetic coil.

There are differences in detail depending on the type of fixture. And that’s not all the details from the list. So how does a perforator, useful in construction, work? The units, in addition to the above parts, are equipped with:

In addition, such instruments have a variety of indicators and speed controls. Having dealt with the nuances of the device of this construction tool, it’s time to move on to the lubrication of its individual elements.

What kind of lubricant is best for which rotary hammers to use?

The best option is to use only branded lubricants. So that the masters do not rack their brains about how to lubricate the hammer drill, the manufacturers of these devices made sure that their assortment included special means for this.

What else can you lubricate the individual elements of the BOSCH rotary hammer (Bosch)?

The brand manufactures over 300 types of various tools, including hammer drills. And to all these devices there are thousands of accessories.

To care for the “destructive” weapon, the company produces the following products:

The assortment of the Japanese brand includes:

The Japanese corporation also took care of its customers and provided a wide selection of how to lubricate the Makita rotary hammer.

You can use a multipurpose grease such as 042005-4A. Or use separate lubricants for specific parts of SPARKY gearboxes (042024-0A) or drills (181573-3).

A set with many Energomash models is already supplied with grease for gearboxes and tails. If there is none or the product has run out, use multi-purpose grease 042005-4A.

Basically, all manufacturers of rock drills equip their products with branded lubricants, complete with the delivery of equipment. You can use both universal options and substances for gearboxes or drills. Many craftsmen prefer to use ordinary lithol instead of original means, which is fundamentally wrong, because it is not resistant to moisture. This can lead to the formation of corrosion on the internal components of the device. Therefore, it is worth using branded lubricants, as necessary, clean and process the power tool and then it will 100% serve for more than one year.

User feedback on lubricants

Experts recommend using only unique materials, the properties of which meet the manufacturer’s requirements. Popular is trimmer grease for trimmer gear. The best lubricant for. If there are none, you should clarify how to lubricate the trimmer gear. Experienced users do not advise using solid oil, because this material is not suitable for the temperature and speed characteristics of the unit, as well as for its consistency. Also, the given material does not have antiwear properties.

The operating temperature range of the solid oil is from minus 40 to 65 degrees, but even with such parameters, the density of the material increases during heating, and the lubricant itself becomes coarse. In case of urgent need to process the tool, you can use “Litol-24”.

Experts advise using only original materials whose characteristics meet the manufacturer’s requirements. If there are none, you should clarify how to lubricate the trimmer gear. Experienced users do not advise using solid oil, because this material is not suitable for the temperature and speed characteristics of the unit, as well as for its consistency. Also, the given material does not have antiwear properties.

Petrol trimmer service

Most lawn mowers and trimmers have a flexible shaft in their design. Its condition must be checked at least once every 50 working hours. To perform this operation, you need to remove the rod end, pull out the shaft and inspect it, then lubricate.

Inexpensive materials are suitable for maintaining the shaft, it is more difficult to select them for the trimmer gearbox. How to lubricate this mechanism depends on the manufacturer of the tool. It is best to use materials that contain molybdenum disulfide. The latter provides smoothing and filling of cracks on the working surface, therefore it is especially appreciated among users.

Important: the use of a large amount of high-density lubricant leads to overheating of the mechanism, increased friction of working pairs and fuel consumption. Therefore, the process of selection of materials and prevention should be treated responsibly.

How to choose the right lubricant

During operation, the units of the mechanism are loaded by contact forces on the teeth, resistance reactions when debris gets in, as well as dynamic and shock loads. Depending on the characteristics of the load, you should choose how to lubricate the trimmer gear.

See also  What is the electric trimmer for. The purpose of the fishing line

When selecting, one should take into account the following reasons:

  • manufacturer’s brand;
  • the viscosity of the lubricant (the selection of this parameter depends on the torque of the shaft);
  • adhesion to the surface of assembly parts;
  • the intensity of the use of lubricant (the temperature of the environment, the type and amount of work should be taken into account).

Varieties of lubricants

To care for the components of the mechanism, lubricants of a different mixture are used:

  • Semi-liquid. Such formulations contain various additives and additives.
  • Plastic. They are the most versatile option. The repair and maintenance of the trimmer gearbox, lubrication for the best technician are described in detail. Mostly used for gear and helical gears.
  • Solid. Lamellar suspensions in the initial state.

The special gear composition belongs to the semi-fluid system.

Stihl trimmer grease is popular. Due to the special composition and components, wear is significantly reduced and corrosion resistance is increased. The main qualities of this brand of grease are:

  • oxidation stability;
  • the highest penetrating power;
  • resistance to the highest temperatures;
  • highest adhesion.

Stihl is suitable for brush cutters and trimmers, also for all closed body transmissions.

To care for the components of the mechanism, lubricants of different consistencies are used:

  • Semi-liquid. It is advisable to lubricate the trimmer gear as often as possible. Upper and lower gearbox. Such formulations contain a variety of additives and additives.
  • Plastic. They are the most versatile option. Most often used for gear and screw drives.
  • Solid. Lamellar suspensions in their original state.

The special gear composition belongs to the semi-fluid system.

Stihl trimmer grease is popular. Due to the special composition and components, wear is significantly reduced and corrosion resistance is increased. The main properties of this brand of grease are:

  • oxidation stability;
  • high penetrating power;
  • resistance to high temperatures;
  • high adhesion.

Stihl is suitable for brush cutters and trimmers and all closed body transmissions.

For smooth operation and durability of the mechanism, a thorough inspection and maintenance should be carried out. How to properly lubricate the trimmer gear? Lubricate as top. Lubrication of moving parts is important. In most cases, these are:

  • place from the transition from motors to a straight shaft;
  • straight shaft joint with flexible;
  • transition of a shaft with a landing head;
  • reducer.

Litol-24 multipurpose waterproof grease is popular among users. The operating temperature range is from 40 to 120 degrees. This grease is used in friction units and is effective at elevated temperatures.

The disassembly process consists of the following steps:

  • The side screw is removed.
  • If there are no traces of grease, then it should be added (3-4 grams).
  • Then the transfer is scrolled manually. This is done to distribute the material evenly over the gears.

The operation is performed a couple of times. The assembly should be tightly filled with grease. At the end of the operation, the screw is put in place and tightened tightly.

To lubricate the trimmer gear, you need to clean the plug and the area around it from dirt, then unscrew it. the lawn mower is laid on its left side. The best price in Minsk. Lubricant for the trimmer reducer maintenance gear. By rotating the gearing, lubricant is immediately added to the gearbox housing before it is filled.

A gearbox is a mechanical device that is designed to transfer torque from the engine to the cutting equipment. How to lubricate with what to lubricate the trimmer gear there is also an upper gear. Located at the bottom of the trimmer.

Power Tool Lubricants

Immediately before maintenance work, remove the electrical cap (or plug from the candle). Do not turn the trim tab over to avoid fuel leakage. Disassemble the device to change the lubricant.

  • the place from the transition from the engines to the straight shaft;
  • joint of a straight shaft with a flexible one;
  • transition of a shaft with a landing head;
  • reducer.

Popular among users is the multipurpose waterproof grease “Litol-24”. The operating temperature range is from 40 to 120 degrees. This grease is used in friction units and is effective at elevated temperatures.

Best Lubricant For Trimmer Reducer

The procedure for applying grease to the gearbox angle grinder

Before applying a new lubricant, it must be thoroughly mixed and made sure that there are no lumps or foreign objects in it. Apply a thin layer of lubricant to the gears, making sure that it completely covers the teeth. It is more convenient to fill the grease inside the bearings with a syringe. Then the grease intended for the angle grinder is hammered into the gear housing. This is necessary for the reason that during operation it can fly off the gears and with a small amount of it, the gears will run “dry”.

Correct grease filling process in angle grinders

After the choice of lubricant for the angle grinder is made, proceed directly to the maintenance of the tool. The correct maintenance process for an angle grinder consists of several steps. First you need to open the gearbox, then remove the old lubricant, apply a new one, check the correct application. Removing the old grease is necessary for the reason that mixing with new grease will not allow it to work correctly and the entire maintenance procedure will not bring any result.

Correct packing of grease into the angle grinder

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

The amount of lubricant put into the gearbox must be such that the oblique teeth of the gears are completely covered by it. An excess will cause it to be squeezed out from under the cover, and an insufficient amount will not ensure the correct operation of the gearbox.

It is best to be guided by the quantity that was set at the factory by the manufacturer of the angle grinder, but remember that the lubricant can dry out, while decreasing in volume.

In this regard, it is better to put a little more and check the correct distribution of the lubricant after turning on the angle grinder. In general, the amount of lubricant is usually about 30-50% of the full capacity of the gearbox.

Gearbox lubricated

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.

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.
See also  Not Adjustable Idle Stihl Trimmer

Gearbox grease angle grinder

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

Open Gear Lubricant Angle Grinder

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

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

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

Gearbox grease angle grinder

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

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

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.

Lubricant for trimmer gear. How and how to lubricate?

Sometimes, in the midst of an intense mowing operation, your trimmer will start making an unpleasant, grinding noise. This complains about the lack of lubrication, the gearbox is the most heavily loaded unit of the device. And soon these “warnings” may be followed by a jamming of the drive.

What kind of lubricant should be used for the trimmer gear?

In the process of operation, the mechanical part of the trimmer is loaded by contact forces on the teeth, resistance reactions from adhering grass (sometimes with dirt), dynamic, shock loads due to constantly changing torque. Lubricant for the trimmer gear must fully take into account these features, so the selection of the brand must be strictly individual.

The following factors are taken into account:

  • Manufacturer’s brand. Each brand reasonably focuses on self-made lubricants (you can talk about cheap Chinese products later). This applies to manufacturers such as Husqvarna, Stihl, Huter, Makita, and others. The only exceptions are domestic-made trimmers: for example, the Caliber in the user manual does not indicate the brand of lubricant at all.
  • The viscosity of the lubricant. As you know, all lubricants are divided into three groups. high-viscosity (colloidal systems containing various additives), plastic compounds for universal use and solid lubricants that soften during operation.
  • Good adhesion to the surface of gearbox parts, as a result of which the grease is not squeezed out into the gaps or out of the unit.
  • Intensity of grease consumption by the gearbox. Here you have to rely on your own experience and the recommendations of specialists, since some trimmer manufacturers, relying on the availability of their own service centers, do not give clear recommendations at all regarding the period of operation of the gearbox between two lubrications.

Lubricant consumption also depends on the temperature at which it retains its lubricity. When the gearbox is heated to 40 ° C, it is considered that its operating conditions are satisfactory, and there is sufficient lubrication.

It is believed that there is no universal lubricant for the trimmer gearbox, but this is not entirely true. In fact, a suitable lubricant will be one that contains the following components:

  • Lead-free antiwear additives;
  • Solid lubricants with the presence of graphite or molybdenum disulfide (the latter is preferable, since the lubricity is fully retained for a wide range of shaft revolutions);
  • Only mineral (inorganic!) Oils, highly refined.

These requirements are fully met by Gear Grease OREGON or Champion EP-0 lithium greases, domestic compositions Oleo-Mas, Litol 24, or Azmol 158, as well as those recommended by the manufacturer of a particular trimmer model.

How to lubricate the trimmer gear?

In the upper part of the body, where the gear block is installed, there is a technological hole, which is plugged with a screw during trimmer operation. This screw is unscrewed, and 1.5. 2 ml of grease is injected into the hole using the spout on the tube. If the lubricant was purchased in a different package, then an ordinary disposable medical syringe is also suitable for this operation.

After that, the screw is reinstalled. This procedure, regardless of the user’s recommendations, should be performed every 10. 15 hours of operation of the trimmer in working mode. Other reasons for updating or replacing the gearbox lubricant are the independent performance of minor routine maintenance (for example, cleaning and flushing the gears of the gearbox before the start of the summer season), repairing the unit, preserving the trimmer for the winter, etc.

If the gear unit is disassembled, it is recommended to completely remove the remnants of the old grease from the surface of the parts, even if it does not have any traces of oxidation and contamination. And only then apply new grease. After applying the lubricant, it is recommended to rotate the shaft several times by hand, and make sure that the lubricant is evenly distributed over all parts of the gearbox.

When lubricating, pay particular attention to the following elements:

  • Flywheel: on its surface, as a rule, grass residues adhere intensively, and thickening herbal juice creates additional resistance.
  • Pawl of the starter coil, which in the process of turning on the drive constantly comes into contact with the grooves on the flywheel. In this case, not only mechanical wear occurs, but also mechanochemical corrosion of the flywheel-dog connection, since the materials of this pair are different (the flywheel is aluminum, and the dog is steel).
  • Bearings, if their seals are worn out, and through them, the remaining grease is squeezed out. In this case, the unit begins to vibrate intensively when loaded. This happens with Chinese-made trimmers, so it is worth thinking in the future about replacing the bearing assembly with a better one, for example, from the Swedish company SKF.