What kind of lubricant is needed for the Bosch angle grinder gearbox

Grease for grinder gearbox

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

The moving parts of an angle grinder are the most susceptible to wear. These are armature bearings, gears, as well as the gears themselves located in the gearbox. The lubricant (or lubricant) supplied 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 lubricant in the angle grinder gearbox must be carried out at least once a year.

Typical screwdriver design

There is nothing complicated about the design of a screwdriver. The main thing, when subsequently disassembling and reassembling the tool, is to remember the position of the parts:

Frame. More often it is made in the form of a pistol. This is due to ease of use and the ability to work from different angles. The case itself is made of plastic - it is inexpensive and lightweight.
Cartridge. Since a screwdriver is used for tightening and drilling, it has a chuck installed on it. Depending on the model, it can be quick-clamping or self-clamping. It is located at the end of the spindle, screwed onto the thread.
Adjustable rotation clutch. To prevent the screwdriver from overheating during operation, it is equipped with an adjustable rotation clutch. If excessive force is applied to the tool, the ratchet is activated and the chuck stops working.
Engine. All models of screwdrivers are equipped with motors. These can be brushed or brushless motors. The motor is a hollow cylinder containing a rotor and magnets. The rotor stands on small brass supports. On the rotor itself, along the circumference, there are grooves. They contain a wire with increased permeability. In brushed motors, brushes are made of graphite or carbon. Brushless motors do not have brushes.
Gearbox. Important mechanism of a screwdriver. Located in a separate building. A planetary gearbox is a series of gears that have a common axis of rotation. Many people are interested in what gearbox is in the screwdriver and what material it is made of. In inexpensive models, many parts are made of plastic, which is fraught with rapid failure. In professional units, the gearbox and other elements are completely metal. This significantly reduces the risk of breakage.

Characteristics and features of lubricants for angle grinders

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 could cause chipping of the moving parts of the mechanism.
The temperature at which the lubricant becomes liquid must be more than 120 degrees.
The oil should not absorb moisture and should form a durable film that protects parts from corrosion.
And also, most importantly, the oil must be of such viscosity that it is able to adhere to moving parts.

The consistency or viscosity of lubricants is classified according to the NLGI (National Lubricating Grease Institute), and in certain cases it is necessary to use oil of a certain thickness. The viscosity of the oil is selected depending on the speed of the gearbox; the higher it is, the thinner 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. Lubricant with index NLGI-2 which is soft.
Lightweight rotary hammers and impact drills. Class NLGI-1, very soft consistency.
Angle grinders, circular saws, brush cutters. Class NLGI-0, semi-liquid consistency.
Heavy hammer drills, jackhammers. Class NLGI-00, consistency is liquid.

Design and principle of operation

The gearbox is a complex mechanical transmission unit through which the axis of the motor-power unit transmits torque to the cartridge.

DeWALT DCD734 14.4V Cordless drill-driver gear greasing

Two or three transmission stages are installed in the gearbox

The design of the “household” dual-mode screwdriver includes:

The plastic case is a small drum that is mounted on a cartridge. The body itself is fixed motionless, and the chuck shaft is inserted into a clamp on one of the transfer plates;
2 or 3 transfer plates (carrier) - a round metal plate, on one side of each there are 3 protrusions for small gears. On the other side of one of them there is a clamp for the chuck shaft, and the other (or 2 others) has another so-called. a “planetary” gear that rotates three small gears;
6 or 9 small gears (three each: they can be of the same or different thicknesses) are the so-called “satellite” gears, which are installed and rotate freely on the projections of the transfer plates. With their teeth they interact with the sun gear located between them and with the ring gear, which is located on the inner surface of the housing;
ring gear - a metal ring with teeth on the inside and small protrusions on one of the rings on the outside. It is placed on these protrusions and ball bearings on the inner surface of the housing.

The parts are lubricated, assembled in series and installed inside the ring gear, which lies inside the housing drum (it has a seal with recesses for ball bearings and gear lugs). After this, the surface of the open satellites is covered with a metal washer, in the center of which there is a hole into which the engine shaft enters with another gear attached to it.

READ How to Lubricate Trimmer Gearbox

During operation of the screwdriver, the gear wheel on the motor shaft rotates the upper satellites, and they, spinning around their axis and, along the ring gear, respectively, transmit movement to the next carrier. Depending on the number of plates and small gears, the rotation speed will decrease proportionally.

As can be seen from the design of the gear unit, they are divided depending on the number of transfer plates into:

Reference. The number of speed modes of the device depends on the presence of stages, and this, in turn, will affect its cost.

Another indicator by which gearboxes are divided is the material from which their parts are made.

In the production of satellite gears the following is used:

plastic. Such structures are relatively lighter, but their reliability is lower than that of their metal counterpart;
metal. They are durable and with proper care and lubrication they will work like a clock.

Important. The disadvantages of metal parts are a continuation of their advantages - they are heavier than plastic ones and are more expensive. Moreover, if a screwdriver is used without violating the operating rules 2-3 times a year, the master most likely will not feel the difference in what material the gearbox parts are made of.

Lubricant for angle grinder gearbox

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

Lubricant for open angle grinder gearbox

In addition to original oils, there are many lubricants on the market produced by third-party manufacturers, so the question of what exactly to lubricate the gearbox of an angle grinder is not an urgent one.

Products from Haskey, Castrol, Liqui Moly and others have proven themselves to be good for adding to an angle grinder gearbox.

Russian manufacturers also keep up with foreign ones and offer their products. Thus, the lubrication of bevel gear angle grinders from . Of course, such gear lubricant is not original and recommended by the manufacturer, so if it is used, subsequent warranty repairs may simply be refused.

Characteristics of lubricants

Lubricant for gearboxes of angle grinders must have a number of properties , sometimes contradictory, in order to fully meet its purpose.

Here is a short list of these properties:

high thermal stability , the ability to maintain lubricating properties over a wide temperature range;
significant dynamic viscosity at non-operating temperatures, preventing leakage from the gearbox;
low kinematic viscosity at 120-140 o C, normal operating temperature in the gearing during long-term operation;

Makita lubricant in the grinder gearbox

high surface activity , ensuring the strength of the oil film on rubbing surfaces;
low volatility and resistance to aging . The lubricant should not dry out or lose its properties over time.
high extreme pressure properties , presence of friction modifiers in the composition. These indicators are especially important in gearboxes with hypoid gearing.
compatibility with seal materials , lack of aggressiveness towards aluminum alloys (gearbox housing) and copper alloys (spindle bearings for some models);

Another important quality of a lubricant for an angle grinder gearbox is that it must be moisture resistant and non-hygroscopic , that is, not absorb water or react with it.

The lubricant must be homogeneous and not separate during storage for the period specified by the manufacturer.

The correct process for packing lubricant into angle grinders

After the choice of lubricant for the angle grinder has been made, they proceed directly to servicing 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, and check the correct application. Removing the old lubricant is necessary for the reason that when mixed with the new one, it will not allow it to work correctly and the entire maintenance procedure will not bring any results.

Proper filling of lubricant in angle grinders

About the essence of the problem

The pioneers of the operation of the first angle grinders, which began to arrive in the USSR from the Bulgarian People's Republic in the 70s of the twentieth century, will willingly talk about their meetings with the grinder. “It was a good car, good for everyone. But it’s just very brittle.” Yes, that's a fact. A grinder obtained by a pieceworker, for example, a steel casting cutter, worked in three shifts at maximum loads and rarely lived to see a year. The reason for failure, or even emergency breakdown of scarce grinders, was one common reason - wear of the gearbox with destruction of the gears. Repairmen of those years recall: “You take it apart, the engine is like new, the bearings are all right, the brushes are intact, and the gearbox is finished...”

When to change the grease in an angle grinder

The frequency of replacing the lubricant depends on how often and under what loads the tool is used. As a rule, this period is approximately a year. In 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 the 4 screws on its cover.

After removing the cover, you can see two bevel helical gears: a large gear and a small gear. The small gear is anchored and drives the large gear. The large one, in turn, is mounted on a secondary shaft, to which a cutting or grinding disc is attached.

Typical screwdriver design

There is nothing complicated about the design of a screwdriver. The main thing, when subsequently disassembling and reassembling the tool, is to remember the position of the parts:

How to properly remove old grease from an angle grinder

The disassembled grinder gearbox must be thoroughly cleaned of old lubricant. It no longer performs its functions, plus solid particles have already accumulated in it, resulting from wear of moving parts. When mixed with a new one, the old lubricant also significantly worsens its characteristics. 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. Removed parts can also be washed in gasoline or solvent. Before assembly, the washed parts must be thoroughly dried. Residues of solvent or gasoline will mix with the new lubricant and change its consistency, which will again worsen its performance.

A few more recommendations for lubricating a rotary hammer

The question is, how often should lubrication

hammer drill, occurs quite often among users of such equipment. There is no clear answer to the > myth question, since the regularity of lubrication depends on the intensity of use of the hammer drill, and in addition, how correctly you can choose the studio, what loads the equipment takes. Gearbox lubrication, yes, the same lubrication for the gearbox and for the impact mechanism. Today, you need to pay special attention to the manufacturer’s recommendations, which must be indicated in the technical data sheet, in addition to whether the warranty period for the device you are using has expired.

Hidden surfaces of gearbox parts must be lubricated before assembling the mechanisms

The question of what actually is, how to lubricate a rotary hammer of one of the modern models, is much easier to answer, since the vast majority of such devices already have a special container in their equipment, where you just need to pour the lubricant , unscrewing the drain cap without draining the old lubricant. Before filling in new lubricant, what level>

The procedure for applying lubricant to the grinder gearbox

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

Screwdriver "Makita"

Description, general information

produces various power tools, including screwdrivers. The company began its history at the beginning of the 20th century, and to this day it continues to delight consumers with its high-quality products. Let's look at the general features and characteristics of the models of this company.

Makita screwdrivers are very powerful. The average speed for various models is about 2300 rpm, which is a good indicator compared to other brands. The weight of most instrument models is within 1.5 kg. Its small mass means that such a tool will be comfortable to work with. The manufacturer also took care of the convenience of working in poorly lit rooms, making most models backlit with LEDs. Separately, it is worth highlighting the type of handle for holding these tools on weight. As a rule, they are made with rubber, and therefore they are convenient to hold in the hand, and accordingly, the work process is much easier.

The disadvantage of these screwdrivers is the strong vibration of the handle during operation, as well as their short-lived batteries.

In addition, the price of this company’s products is quite high, which is important for domestic consumers

Let's look at the design of a screwdriver on a specific model 6271D. The diagram of this model is presented in the figure below.

Scheme 1

The diagram shows:

Shift lever
Housing assembly
Nameplate
Screw
Spring
Reverse shift lever
Start button
Contact terminal
Screw
Keyless chuck
Gearbox assembly
Electric motor
Screw
Housing assembly
Charging node
Battery

A modern screwdriver is a high-tech device. Important design elements:

Removable battery
Rubberized handle grip
Powerful electric motor
Metal planetary gearbox
Soft start button
Reverse switch button
Torque regulator

These are the main components of the screwdriver design, which are included in the basic package of any screwdriver model.

Disassembling a Makita screwdriver

To disassemble the screwdriver you will need a Phillips screwdriver and a little personal time. To disassemble the screwdriver completely, you need:

unscrew the housing mounting screws;
remove the composite start button mechanism;
remove the electric motor together with the gearbox;
disconnect the gearbox from the engine by unscrewing the bolts holding them together.

To disassemble the screwdriver battery, you need to unscrew the bolts connecting the case, or separate the adhesive-based connections of the case using a soldering iron. Inside the battery there are several nickel-cadmium batteries that have a certain capacity and carry a charge. If the battery is repaired, they must be replaced with new ones.

The cartridge is changed using a screwdriver and a hex key. First, you use a screwdriver to unscrew the mounting screw in the cartridge, rotating it clockwise. Then the hexagon is inserted, the reverse button is turned on, it is clamped, and then the cartridge gives in easily.

How much lubricant should be used when replacing an angle grinder gearbox?

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

It is best to rely on the amount that was supplied by the manufacturer of the angle grinder, but you must remember that the lubricant can dry out and decrease 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 approximately 30–50% of the total capacity of the gearbox.

Lubricant applied to the gearbox

Lubricate the chuck and drill shank

This operation is very simple, so its description will be quite short.

Simply take the drilling fluid and add it directly to the chuck. Another option involves applying it to the shank and then installing it in the chuck socket. But no one forbids combining these two methods for reliability.

It is necessary to ensure that the lubricant is constantly present and add new one as necessary. If this procedure is neglected, the shank will overheat, which will lead either to its separation from the rest of the drill or to flattening. So don't be lazy and add.

That's all you need to know about the chuck and shank.

As promised, I am attaching at the end a link to a video with the switch disconnected:

This is all the information I have on the issue of lubrication of the hammer drill. I hope it was clear and accessible. With this I say goodbye - see you again!

In modern construction it is very difficult to do without reliable and high-quality tools. One of the necessary electrical appliances is a hammer drill. It is with its help that you can drill holes in almost any surface or make a channel for wires; this tool also replaces a drill and jackhammer with almost no problems. Such a replacement is possible due to the fact that this equipment produces both rotational and longitudinal-axial movements. The article will discuss which lubricant to lubricate a hammer drill in order to maximize its service life.

Content:

The very first hammer drill appeared in 1851; it was then used in the mining industry, was manual and did not have such rich functionality. But after just over 150 years, it has become one of the necessary tools for the home craftsman and professional builder. The design of the hammer drill is quite complex and in order to preserve it for a long time and not subject to premature repair, it is recommended to carefully monitor its condition. First of all, it is necessary to lubricate certain parts. This process will help to significantly extend the life of the electric assistant.

Checking the correct application of lubricant to the angle grinder gearbox

The last step when servicing an angle grinder is to ensure that the lubricant is properly applied and distributed inside the gearbox. To do this, after the gear unit has been assembled, turn on the power tool without load for several minutes, while ensuring that there are no extraneous sounds, smells, etc. If they occur, you must immediately disconnect the angle grinder from the network. The heating of the gear unit is also checked. The lubricant must distribute heat evenly and the temperature of the gear unit should not be very high.

After some work, unscrew the 4 screws, then remove the cover from the gearbox. The helical gears should be visually inspected for the presence of lubricant. If it is missing, it means that too little lubricant was used and should be reported. If during work it is squeezed out of the cracks, then it means that there is too much of it and the excess should be removed. After making any changes, check the operation of the angle grinder again without load.

Home workshop: how to repair a screwdriver gearbox?

Any tool, regardless of model and brand, will sooner or later break down. A screwdriver is no exception: individual parts and assemblies wear out over time, and without proper care or under force majeure circumstances they may fail.

The main functional load when operating the tool is distributed through the gearbox between the engine and the chuck, so if something happens to the gearbox, the work will stop. In order not to spend money on repair services, it is enough to use the advice of specialists to restore the operation of the unit yourself.

Review of lubricants for grinders

It was previously said that there are many types of lubricants, both from foreign and domestic manufacturers. A good lubricant for power tool gearboxes is produced by Bosh. It’s called “Gearbox Lubricant” and is packaged in 65 gram tubes. One such tube is enough for several grinder maintenance.

Lubricant for grinder gearboxes of various brands

Of the lubricants intended for grinder gearboxes produced by domestic manufacturers, we can recommend products. It is called “Nanotech MetalPlak Electra” and is intended for tools that work under intense load. Also among domestic lubricants, CV joints or Tsiatim-221 are widely used, but they require preliminary preparation and, in fact, are a homemade lubricant.

Replacement frequency

Many sources (manufacturers of hand-held power tools, lubricants, authors of instructions and good advice) recommend replacing the lubricant in gearboxes of angle grinders, drills, and rotary hammers “ at least once a year, or more often, depending on the intensity of use .”

A professional-grade grinder, capable, as its instruction manual says, “to work at full load for a long time and without interruption,” simply will not survive a year without lubrication.

The professional angle grinder Bosch GWS 22-230 H requires frequent replacement of lubricant. Photo 220Volt

An angle grinder stored on a shelf in a garage (or in a shed at the dacha) will last for many years without breakdowns, as long as moisture does not get into the cavity of the gearbox and do its rusty work there.

Decide for yourself whether to lubricate or not, focusing “ on the intensity of use” and on the results of the diagnostics carried out by you.

DIY grease for an angle grinder

A self-made lubricant for grinder gears consists of a base and a diluent. The basis of homemade lubricant is usually a CV joint with molybdenum disulfide or Tsiatim-221. They have a second NLGI viscosity, so for use in an angle grinder gearbox, the base must be diluted. As a diluent, it is best to use simple mineral industrial oil, which, for example, is I-20 oil. To obtain a viscosity of NLGI 0, you will need to mix approximately 70 percent base and 30 percent thinner. The resulting mixture is thoroughly mixed and ready for application to gears and bearings of angle grinders.

Making your own lubricant

Timely maintenance of any electric tool is the key to its long-term and trouble-free operation. A properly functioning tool is also a guarantee of safety for the person using it. Using the tips given above, everyone can choose the right lubricant for the angle grinder gearbox and replace it without resorting to the help of expensive power tool service centers.

Source

How good is the ice drill knife sharpening machine?

Whether the fisherman wants it or not, the blades begin to dull over time. There are several factors for this: ice density, sand, small pebbles and other abrasive particles. During fishing, you can correct the edges with a regular whetstone or even a file, but it is necessary to sharpen more carefully under other conditions.

Read also: Corrugated sheeting technical specifications dimensions

For this purpose, you can design a machine for sharpening ice drill knives with your own hands, or you can make a regular corner stand that will allow you to place knives at a certain angle. Its advantage is the avoidance of bevel of the edge.

Knife sharpening algorithm:

Use a needle file or an abrasive stone to remove small chips that form while drilling a hole.
The knife is attached with the long end to the stand at an angle of 30 degrees. Corrected to the required state.
The knife turns the other way around. The angle between both edges should be almost straight, which will reduce the risk of jamming during drilling.
When sharpening, the blade must be constantly cooled by dipping it in a container of water.
After sharpening, you need to carefully polish the surfaces, not forgetting the cutting edge.

When transporting knives, they must be hidden in a special case to avoid defects and not injure others. A DIY ice auger case wouldn’t hurt either. Experienced fishermen use old jeans as a material because this fabric is durable.

Attention Bearing Buyers

Dear customers, send your questions and requests for the purchase of bearings and components by mail or call now: +7 Delivery of bearings in the Russian Federation and abroad. Bearing catalog on the website

Attention Bearing Buyers

What lubricant to use for the grinder gearbox

Angle grinders (angle grinders) are quite popular tools that are often used in the household. Like any other devices, they periodically fail during operation. Most often this happens due to the fact that the lubricant of the gearbox for angle grinders has dried out. Therefore, people who are going to use such power tools should become familiar with the features of their lubrication.

The angle grinder gearbox is the most important part on which the operation of the power tool depends

Typical screwdriver design

There is nothing complicated about the design of a screwdriver. The main thing, when subsequently disassembling and reassembling the tool, is to remember the position of the parts:

Frame. More often it is made in the form of a pistol. This is due to ease of use and the ability to work from different angles. The case itself is made of plastic - it is inexpensive and lightweight.
Cartridge. Since a screwdriver is used for tightening and drilling, it has a chuck installed on it. Depending on the model, it can be quick-clamping or self-clamping. It is located at the end of the spindle, screwed onto the thread.
Adjustable rotation clutch. To prevent the screwdriver from overheating during operation, it is equipped with an adjustable rotation clutch. If excessive force is applied to the tool, the ratchet is activated and the chuck stops working.
Engine. All models of screwdrivers are equipped with motors. These can be brushed or brushless motors. The motor is a hollow cylinder containing a rotor and magnets. The rotor stands on small brass supports. On the rotor itself, along the circumference, there are grooves. They contain a wire with increased permeability. In brushed motors, brushes are made of graphite or carbon. Brushless motors do not have brushes.
Gearbox. Important mechanism of a screwdriver. Located in a separate building. A planetary gearbox is a series of gears that have a common axis of rotation. Many people are interested in what gearbox is in the screwdriver and what material it is made of. In inexpensive models, many parts are made of plastic, which is fraught with rapid failure. In professional units, the gearbox and other elements are completely metal. This significantly reduces the risk of breakage.

The role of lubricant for the grinder gearbox and its characteristics

During operation of the gearbox, the gear teeth rotate intensively, which increases the temperature. This causes wear and weakening of the metal. To prevent this, parts must be lubricated regularly. If you treat the gearbox with good lubricants, it will not heat up too much and become deformed.

Lubricant for angle grinders must have the following characteristics:

viscosity - no more than 800 units;
strength limit - 120 pascal;
resistance to elevated temperatures up to 100-150 degrees.

Additional Information! Also, the lubricant composition must have water-repellent properties to protect the metal from corrosion.

Bosch jackhammer lubrication

Experts note that similar products can improve the quality of work of even fairly average equipment. The viscosity class of the oil must be correctly determined. For this reason, the quality of the work performed by the equipment and its durability also depend.

As mentioned above, excellent oils for various electrical equipment are produced by a huge number of foreign companies. Hitachi, Metabo, Makita and Bosch rotary hammer lubricants are widely known to consumers around the world. They are distinguished by a large range of narrowly specialized products. This allows you to select a balanced oil option for each mechanism.

Also, the above companies are constantly developing new, improved parameters of their own lubricants. This allows us to remain permanent favorites. For professional equipment that is subjected to significant loads, these materials are simply very necessary.

Also one of the recognizable, high-quality lubricants is the product of the German company Lubcon. This brand produces synthetic oils for rotary hammers. These products are environmentally friendly and have the best features. The products of this German company are used for particularly heavy loads on the tool.

Today, the Russian and foreign markets are increasingly being conquered by Russian-made power tool oils. Lubricant for rotary hammers “Interskol”, “Zubr” not only has a low price, but also completely meets modern requirements. A wide range and constant laboratory control allow manufacturers to retain their favorite positions.

Products are supplied both to neighboring countries and to Europe. These are high quality, modern products. A wide selection will allow you to choose a lubricant that better meets the requirements of the technology.

Craftsmen, whose work often requires the use of a hammer drill, recommend changing the oil in accordance with the manufacturer's instructions. But with all this, it is necessary to take into account the frequency of equipment implementation, as well as working conditions.

If excessive dust levels are observed, it will be necessary to create shifts more often. It should also be taken into account that it is not recommended to combine lubricants from different manufacturers. The additives included in the composition can vary greatly and conflict with each other. With all this, you will like the reaction more unpredictable.

If the warranty period has not yet expired, it is better to entrust the oil change to a service center. This will be the key to the quality of the work. Lubricating the hammer drill on your own is possible. However, you need to understand this technology in small details.

If the warranty period has already expired and you want to change the oil yourself, you need to refer to the manufacturer's instructions. There is a compartment indicated where the lubricant for the hammer drill is poured.

The inside is washed with a special substance or kerosene. Apart from the gearbox, replaceable couplings and drill, other elements of the tool do not require lubrication.

A small amount of oil is applied to the designated areas. There won't be a lot of lubrication, as it is also called. In any case, the result will be unsatisfactory. Further assembly is done in reverse order.

Lubrication for a rotary hammer is very important. By choosing and changing the oil correctly, you can significantly extend the service life of your equipment. Without proper maintenance, the presented power tool quickly burns out. Due to the complexity of the design and heavy loads, this equipment greatly requires the use of lubricants. They need to be selected very carefully. Indeed, thanks to the additives contained in the oil and its viscosity, different properties of similar substances are ensured.

Source

Types of lubricants for grinders

The mixture for CV joints is suitable for lubricating the angle grinder gearbox

Before lubricating the angle grinder, you need to familiarize yourself with the main types of lubricant. The following mixtures are most often used to treat angle grinder gearboxes:

Important! If it is not possible to purchase branded products, it is better to use mixtures for CV joints. You can find them in almost every auto store.

What is the best lubricant and which one to use for an angle grinder?

Many people are interested in what kind of lubricant is needed for an angle grinder gearbox and what is best to use. To understand this, you need to familiarize yourself with the features of choosing lubricants for tools from different brands.

Bosch

Bosch is a fairly popular manufacturer of drills, rotary hammers, grinders and other power tools. People who use devices from this brand can use their proprietary lubricants. They are sold in small tubes with a capacity of 50-100 ml. This is enough to thoroughly lubricate the gearbox 3-4 times.

If you cannot purchase a lubricant from Bosch, you can look for universal mixtures. Solid oil or a mixture for CV joints and Metabo angle grinders is also suitable.

Makita

Makita grease is one of the most expensive on the market

This company, like Bosch, also produces power tools and lubricant mixtures for them. Despite the fact that Makita's catalog of lubricants is small, you can still find a suitable composition for treating the gearbox.

The best 18 V screwdrivers for ice augers

Here is a rating of popular models of 18-volt screwdrivers for ice drills that may be of interest to fisherman. Each has its own strengths, weaknesses, and price. The choice must be made taking into account the desired characteristics and the available budget. The battery voltage for all devices is 18 V.

Popular models:

Bosch GSR 18-2 is a compact tool, its weight does not exceed 2 kg. Torsion torque – 80 Nm, battery – 3 Ampere/hour. The battery is nickel-cadmium, there is a backlight for the work area, and a convenient work case for carrying.
Bosch GSR 18 VE-2-LI is a durable professional-grade tool, lithium-ion battery, capacity 3 Ampere/hour (2 pieces included in the package). The tool fits perfectly in the hand because it has ergonomic rubberized grips. Torsion – 88 Nm, weight – up to 2.5 kg. For maximum convenience during work operations, the work area is illuminated.
Makita 8414 DWAE is a professional category screwdriver, the weight of the device is about 2.4 kg. Maximum torque – 65 Nm, capacity no more than 2 Ampere/hour. There are two batteries included in the package, the voltage is 12 V. A convenient case is used for transportation.
Makita 8434 DWFE – cordless impact screwdriver, lightweight and compact (up to 2.5 kg). The maximum torsion torque is 65 Nm, the battery capacity is around 3 Ampere/hour, the voltage is approximately 14.4 V. The device is productive and durable. The charger is nickel-metal hydride.
Hitachi DS18DSFL is a screwdriver with a relatively low torque of around 41 Nm. Battery type – lithium-ion, capacity – 1.5 Ampere/hour. Reduced weight – 1.7 kg, a case is provided for transportation.

Bosch GSR 18-2

Bosch GSR 18 VE-2-LI

Makita 8414 DWAE

Hitachi DS18DSFL

Makita 8434 DWFE Before choosing, look at reviews of all models, you can read video reviews. This will allow you to better understand the strengths and weaknesses of each solution and settle on the optimal option.

The correct process for replacing grease in an angle grinder gearbox

Replacing the grease for the grinder gearbox is performed as follows:

Disconnect the power cable of the angle grinder.
Dismantle the circle.
Unscrew the fastening screws and remove the gearbox cover.
Clean the surface from any remaining lubricant.
Remove the spindle with gear and bearing.
Wash the parts with gasoline and dry.
Apply a new layer.
Assemble the gearbox and install it in the grinder.

Additional Information! If any remaining lubricant escapes through the spindle, it should be removed with a clean cloth.

How to test the motor and button with a multimeter

To determine the functionality of the button and motor, a multimeter is used.

To diagnose the motor, the gearbox and the wiring connecting the part to the start button are disconnected, and then the resistance of the armature winding is measured. If there is no reading, this indicates a winding break. If the numbers on the screen are very low, a short circuit has occurred.

To test a button with a multimeter, the wiring connecting its input terminals to the battery is twisted, and the tester probes are connected to the outputs. The device is switched to resistance measurement mode and turned on. If the values on the display are close to zero, the part is working properly. When broken, the screen shows infinity.

Signs of lubricant aging

Gasoline is ideal for removing old grease

There are several signs that indicate it's time to lure in some lube. These include deterioration of rotation, bearing knocking and rapid overheating of the angle grinder. In this case, if you do not change the lubricant for a long time, the device will quickly fail. To prevent this from happening, you need to monitor the operation of the gearbox and lubricate it on time.

Replacement periods

Many angle grinder owners are interested in how often they need to lubricate the gearbox. It is impossible to determine the exact period, since everything depends on the number of loads. On average, this should be done at least once a year. If the tool is used daily, it should be lubricated every six months.

Removing old grease

There are situations when old grease is difficult to remove. Most often this happens if it has not been changed for a long time. In such cases, you won’t be able to get rid of it with a simple rag. You will have to carefully treat the gearbox with gasoline and kerosene.

Applying a new layer

A new layer must be applied very carefully and carefully. It is necessary to smear it with your hands so that the composition penetrates into all free places. It is necessary to squeeze the mixture out of the tube until its excess begins to flow from the back side of the gearbox.

Required amount

Lubricant must be applied to the entire surface of the gearbox

Some people think that you shouldn't apply too much lubricant, but this is far from true. The fact is that if there is not enough of it, it will dry out faster and the gearbox will begin to work worse. It is necessary to add enough mixture so that each tooth is covered with it.

Monitoring the correctness of the process

After lubrication, you need to check that everything was done correctly. To do this, you will have to start the grinder at idle.

For reference! If the device operates quietly, the gearbox is well lubricated. The appearance of extraneous noise indicates insufficient lubrication.

Causes of failure

Like any mechanical unit, when the gearbox operates, the parts are affected by frictional forces, causing them to gradually wear out or wear out and lose their “adhesion.” In order to avoid this, all parts of the assembly must be properly lubricated.

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Therefore, the first reason for gear unit failure is a lack of lubrication (but there may also be an excess of it).

Also, the gearbox is affected by such a “scourge” of mechanics as dust. It settles on the parts and during operation heats up along with them. This is especially dangerous for plastic gears, since under the influence of heat from dust they are subject to deformation - which leads to failure.

Finally, another nuisance for the gearbox is the ingress of foreign particles into it. Clogging between the teeth, they jam them. Because of this, when the motor shaft rotates, an excessive load is created on other structural elements, which leads to their destruction.

Reference. If one of the reasons or force majeure has led to damage to an element of the gear unit (gears, bearings or shafts), it is often necessary to install a new gearbox as a whole, since not all manufacturers have on sale individual gearbox parts to make a replacement.

Homemade mixtures

People who do not know how to lubricate the angle grinder gearbox can use homemade mixtures. Quite often people mix several compounds together.

For example, to ensure the required level of adhesion, you can use lubricant for CV joints. Before adding it to the gearbox, it is mixed with MS-20 oil to obtain the desired consistency.

The gearbox is an important part that is responsible for the performance of the angle grinder. It needs to be lubricated regularly for the sander to work well. However, before you do this, you need to figure out how much oil to add and how to use it correctly.

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