How is the brush cup attached to the angle grinder. We choose nozzles for a grinder for wood processing - types and characteristics

An angle grinder, if you know and correctly use all its capabilities, is a truly universal device that lends itself to almost any material. And if we are talking about the processing of wood on a large scale, then the "grinder" is much more effective than manual abrasive tools and fixtures. The main thing is to choose the right nozzle. This article will help you understand their main modifications and specifics of application.

Rough cleaning of wood

planer disk

Such a nozzle almost completely replaces this hand tool.

An irreplaceable thing, if it is required, for example, to make a rough processing of a log - when erecting a log house, preparing fence supports, and so on.

Application Features:

In this case protective cover can be removed. Such a nozzle is one-piece, and its destruction does not occur. But protection from flying wood chips (glasses, tight clothing, gloves) is required.
It is allowed to work only with a “grinder”, in which a second handle is provided (or installed). The angle grinder must be held when roughing wood with both hands.

Peeling disc

The main purpose of such nozzles is to remove the bark from the wood, to trim the workpiece. If "Bulgarian" in skillful hands, then with such a device you can make a sample of the material. For example, if you need to cut a bowl. If erected log house, then an angle grinder with such a nozzle perfectly replaces a carpenter's ax.

In some cases, a peeling disc can be used to cut. True, the cut will be wide, and there will be a lot of waste (chips, sawdust).

Milling

Disks

These nozzles are available in various designs. The main difference between the devices is the size of the abrasive grains.

They are not much different from rasps in terms of specific application. The difference is only in the speed of the technological operation. With certain skills, it is advisable to use these for finishing wood.

cutters

They are, and specially for wood. The assortment is significant, since nozzles of this type differ in the configuration, location and size of the teeth.

Purpose of cutters:

Selection of grooves.
Edge trimming.
Cup cutout.
Sawing (for wooden blanks of small section).

Application specifics:

When processing wood with such nozzles, it is forbidden to dismantle the protective cover.
Each product has instructions. It clearly indicates for what types of work this nozzle is intended, the recommended speed of the grinder, and so on.

wood sanding

If you decipher the abbreviation angle grinder, then it is clear that it is the finishing that is the main purpose of the grinder.

cord brushes

They are mainly used for primary (rough) grinding of wood, when it is required to smooth out the irregularities of the sample.

End discs

The names speak for themselves. Such nozzles process the final parts of wooden blanks (cuts). Especially effective if you have to deal with angular (oblique) cuts.

Petal nozzles

The most used grinding devices for the grinder.

Such nozzles are applied sequentially, so several of them will be needed to process wood. Grinding begins with a disc with a "coarse" abrasive, and gradually the size of its grain must be reduced. Consequently, the devices in the process of working on the "grinder" periodically change.

grinding wheels

Most universal fixture to Bulgarian. It alone is enough for varying degrees of grinding. The nozzle itself is a metal base on which circles with one grain or another are attached. They are easy to change, or as they wear out, or in the event of a transition to another area of work. Therefore, only circles are consumables. The nozzle itself is used indefinitely.

Application specifics:

Wood grinding.
Parquet scraping.
Edge and end processing.
Cleaning wood before painting.

wood polishing

For these purposes, brushes, disks, circles are used. Their "working elements" can be made of sponge, felt, fine-grained "sandpaper" and a number of other materials.

The article provides examples of only the main types of nozzles for the grinder. There are a lot of products of this class, so it's easy to choose best option devices for processing any wood. The author hopes that the information provided will help the reader in this.

On a note!

Wood processing also means its cutting (sawing). Sometimes, in the manufacture of piece parts, it is necessary to adjust them at the installation site even before starting to grind the sample. Some "craftsmen" (and there are many of them among friends and on the Internet) are advised to use for such operations. It is strictly forbidden! Here are just the main reasons why this should not be done.

"Bulgarian" - a high-speed machine. And although the metal from which the cutting discs are made is durable, in this mode it does not withstand for a long time. More precisely, cutting edges(teeth), which are fixed by soldering. With intensive work, they fall off and scatter to the sides, and with great speed. The consequences are easy to predict.
Not all discs are suitable for installation on angle grinders in terms of size (primarily, outer diameter). So, you have to dismantle the protective cover. The same thing - you can forget about the safety of the employee.
The structure of wood (even hardwood) is quite loose. Therefore, there is a high probability that saw blade due to constant vibration can pinch. How the “Bulgarian” will behave in such a situation, given its power and speed, no one will undertake to predict. But the fact that it breaks out of hands quite easily is unequivocal.
Constant changes in the mode (for the same reason - the viscosity of the lumber) lead to a systematic overheating of the angle grinder engine. With this use, the "grinder" will not serve for a long time.

That is why wood processing with its help is carried out only superficially - rough cleaning, grinding, brushing. And for cutting, you should use sawing tools and mechanisms (hacksaw, circular saw, electric / jigsaw, and so on).

Metal brushes for grinders (shm)

AT different areas human activity, where processing of materials is needed, a large role is given to grinding. After all, the product will not look ready (as a rule, it will not lose functionality) if it has bulges or burrs. For this purpose, special grinding materials should be used, among which nozzles for an angle grinder (we are talking about the “grinder”, as it is commonly called) in the form of brush brushes are of great benefit. Read more here.

What are the brushes for grinders?

Now Russian manufacturers offer different variants making brushes for angle grinders. They mainly differ in the material for the villi, starting from which the nozzles are divided according to their own stiffness. Nettle, for hard brushes use stainless steel towed wire. The choice of this material was not accidental, because it allows you to work without much wear in quite aggressive environments. The alloyed metal endures the influence of high temperatures that occur during processing (it is also worth considering the fact that heated products are often processed with such equipment). The protective layers do not allow the metal to be affected by corrosion, which significantly increases the service life of the angle grinder brush.

Look around. Shields for angle grinders (grinders).

Circles for the grinder test comparison PAINT REMOVAL

Paint stripping disc for angle grinder grinder) Used to remove and clean metal

Soft brushes most often are also made of metal wire, but its diameter is noticeably smaller. If the rigid options come with dimensions of 0.5-0.7 mm, then for these they already use a wire with a diameter of 0.3 mm. They provide gentle cleaning, which is ideal for final processing of products. In this case, you can find both wicker options and corrugated ones (the choice depends on the type of work being done).

What brush to choose?

Interskol

For Interskol angle grinder models, in order to pull out the brushes, it is necessary to remove the rear cover of the stator housing. Then the screws are removed from the holder.

The wear of elements is determined by their residual length. The length of the working carbon brushes cannot be less than 5 mm. For a more detailed study of the technology of changing brushes, you can watch the video.

Bosch

Access to the electric brushes at Bosch angle grinders is carried out by opening the handle of the stator housing, which is held on by a screw. The length of the working electric brushes of the coal type must be at least 8 mm. By the way, carbon electric brushes for Bosch are distinguished by the presence of a device that stops the operation of the tool when the brushes reach the minimum operating length.

Makita

In the Makita angle grinder, the screw is unscrewed and the case back cover is removed. The Makita 9565 model uses carbon brushes with auto-off.

Selection of electric brushes

Brushes differ in size range, shapes, material of manufacture. Previously, they were produced in the form of a structure consisting of copper wire and a conductive brush. But due to very rapid wear and tear, it was decided to modernize such a design. At present, electric brushes are produced by pressing at high temperatures carbon material.

These replaceable elements of the mechanism cannot be underestimated, because the service life of the engine depends on the correct operation of the brushes, because by replacing the brushes in time, you can protect the angle grinder from destroying the armature collector plate.

Types of brushes:

Graphite brushes. During production, graphite bonds with special composition to which soot may be added. Further, under pressure, molding takes place, and after firing. The difference in the production of such brushes is due to giving the material additional strength and wear resistance. They are made of carbonaceous materials (graphite, soot) and binders. After the standard molding procedure, graphitization follows, which involves a temperature firing of 2500-2600 ° C in specialized furnaces. Such electric brushes are the most common for the use of angle grinders. Despite the comparatively higher price point, the benefits of the properties outweigh the high cost;
Carbon brushes. The main material for the production of these brushes does not differ from graphite. The difference in production technology is the absence of heat treatment, which reduces production costs. Hence the low price tag in stores. But the wear resistance of such brushes is negligible.
Metal brushes. The composition of raw materials for the manufacture of brushes includes not only graphite powder, but metal. Mostly copper powder is added, but lead, tin or silver can also be added. At the same time, the metal base of the powder in the composition contains about 80%. Such brushes are used in generators and electric motors, because they are highly durable and reliable. But they are very rarely used in household electrical appliances. The price category is high.

Before buying electric brushes, it is better to look in the instructions or in those. grinder's passport, which brushes the manufacturer recommends. Also on the choice of the necessary brushes, you can consult the service centers.

Brushes are called as current collectors inside the grinder - necessary element an electric motor, without which an angle grinder, like any other electric tool, cannot work, and removable nozzles that allow cleaning, grinding and even polishing with this tool various surfaces. In this article, we will try to deal with those and other brushes.

Brush Features

If we talk about electric brushes, then first you need to explain the name. This device was called brushes in the early days of its existence (the beginning of the 20th century), when, indeed, a design resembling a brush or, more precisely, a brush was used to remove current from the rotor of an electric motor. Such a device, although high efficiency, turned out to be too short-lived and was replaced by a more durable one, made of a dense material into which a copper wire is pressed.

The movement of the rotor of an electric motor causes constant friction working surface electric brushes, which is the main reason for the failure of this part. As a result, they have to be changed periodically. This process is natural and inevitable during long-term operation of any power tool. It is very simple to identify brush wear: a previously reliable unit will start to work intermittently, the characteristic smell of ozone may appear from the abundant formation of sparks in the current collector. It is advisable to replace the electric brushes at the first sign of wear.

Electric brushes are graphite, carbon or metal-graphite. In all varieties, the main material is carbon.

In the first case, the product is pressed with high pressure, and then thermally processed, gaining increased wear resistance. The coal option is the cheapest, as it does not involve heat treatment. These brushes are the least durable. Metal-graphite brushes are the most expensive, since, in addition to carbon, they contain metal powder. This is the most wear-resistant option, which in household appliances can be found very rarely. As already mentioned, a removable attachment for a grinder is also called a brush.

In order for the UMSh (angle grinder) to perform its main functions, it is necessary to install one or another nozzle on it. These can be cutting or grinding discs or brushes with various kinds of pile, fixed in a circle. Such a removable device is called a cord brush or even shorter - a cord brush. Brushes, like discs for UMS - consumable. During operation, they wear out, and they need to be changed. The brushes for the grinder are designed in such a way that they are mounted on the rod thanks to the hole in the center, this is their main difference from the brushes for the drill, which have a shank for their installation in the drill chuck.

The bristle of the brush, depending on the specifics of its application, can be steel, brass, polymer fibers and even wool.

What are they for?

In this section, we will not talk about electric brushes for a long time, their purpose is to remove current from the rotor (armature), in other words, without them there will be no rotation in the electric motor, the rod of the power tool will not rotate, and it will not work. But about the cord brushes you need to say more. They are applied for machining various materials. different types These attachments are used for cleaning before painting or applying primer, for brushing wood, for removing old paint from various surfaces, for polishing, grinding, smoothing corners and other operations.

They are especially necessary for cleaning metal products after applying welding to remove scale.

Classification

As already mentioned, electric brushes can be classified according to the material from which they are made. Graphite brush, as the name suggests, is made of graphite, which is added with carbon black and binding elements. This type of current collectors is most often used for UMSh.

The carbon brush is made of the same material, but without heat treatment. Such a product wears out much faster and is practically not used for grinders. It is important not to make a mistake when purchasing replacement brushes. Carbon brushes on the grinder will not last long.

A metal-graphite brush is used in large industrial units, and it is unlikely that it will be possible to install it on a grinder. This is the most durable product, characterized by a very high price. The variety of cord brushes is much greater, their shape, material and size vary significantly, which is determined by the variety of applications for such equipment. They can also be classified according to the material from which they are made. The most popular brushes with metal bristles. A metal brush is a fairly versatile nozzle. For the manufacture of such products, both metals and alloys are used.

For work on metal, steel brushes are used. Stainless steel brushes are best used on stainless steel or aluminum. Often the steel pile is covered with brass, such brushes do not corrode. There are also pure brass brushes - despite their great softness, they have a number of advantages: a relatively soft effect on the material, the absence of sparks when working at high speeds, and the absence of scratches during surface treatment.

The wire for such brushes can be different. Twisted wire is usually the most rigid, it can be assembled in bundles (they are more rigid and can self-sharpen) or fixed randomly. With the help of such effective nozzles, welding scale or rust can be torn off. The corrugated cord brush has a wave-like curved pile and, unlike the previous type, does not affect the surface so intensively. With its help, you can clean the surface of old paint.

Flat bristle brushes have the widest range of applications, they are the most versatile and can be used on any surface. Their effectiveness may be somewhat lower than that of specialized nozzles. Nozzles with polymer bristles, such as nylon, are used for polishing various surfaces, including metal. They can be successfully used for woodwork - to highlight the texture or finish. Plastic brushes are often used to work with soft materials.

Brushes can also be divided by shape.

Cup is used to work with large surfaces. Its form follows from the name. On such a brush, most often, a clamping nut is immediately fixed, since the special key provided with the grinder cannot be applied to it. The conical brush is used to work on concave surfaces. Radial, as a kind of flat brushes, is used to treat hard-to-reach areas. The disc brush, the most common type of cord brush, also has a flat shape and can be used for processing a wide variety of small surfaces.

And cord brushes are divided into size groups. The diameter of the brushes is determined technical capabilities grinders and the scope of this nozzle. Brushes with a diameter of less than 115 mm are usually used for processing small surfaces. It is better not to use a circle of more than 200 mm for a small angle grinder, you will have to remove the protective cover, and this is a violation of all safety standards. Such large brushes are usually used for processing large structures and only with the help of large powerful UMShs.

The most acceptable for domestic purposes is the brush diameter of 125 mm. It is possible to offer a fourth classification of cord brushes - by application. Brush brush, the name is given from the name of the technical operation, which is carried out with the help of this nozzle. Brushing - preparation of the surface for subsequent processing: removal of rust, paint, dirt. At some stages, this is a process of chemical action on the surface of the product, but the initial treatment consists in mechanical cleaning of the surface. For mechanical brushing, metal (steel or brass-plated) brushes are used. The task of such processing is the removal of scale, oil stains, minor defects, burrs, and the like. Without brushing, it is sometimes difficult to assess the quality of the weld, adhering scale can hide some defects.

For processing soft materials(plastic or wood) use nylon, tow (sisal) and hair stripping brushes. Such brushes must be moistened with special emulsions (for wood, you can use vegetable oil), otherwise the surface will be matte.

How to choose?

In stores, the choice of cord brushes for grinders can be very wide. Consider what you need to consider when choosing this type of nozzles. The selection parameters can be dictated by the nature of the work to be done and the size of the angle grinder on which the brush will be installed. On a small grinder, in no case should you install a nozzle designed for a large unit. It is also important to know the number of revolutions of the grinder, the brush must be selected in accordance with this indicator. If on a fast angle grinder there is a circle designed for low speeds, its effectiveness will be small, since, most likely, it will fail before the end of the work. Working on a “slow” angle grinder with a nozzle for a revolving unit will be very laborious and will take much more time than with a brush corresponding to the capabilities of an angle grinder.

If you have decided on the size and type of brush, you should pay attention to its quality. The wire iron brush should have an evenly distributed bristle, individual bristles should not be longer or shorter, this factor can cause poor surface finish and excessive vibration, therefore, the load is not only on the parts of the grinder, but also on the hands of the one who will do the work .

Excessive vibration of the machine during operation - main reason high load on the muscles of the hands. With a brush with a small diameter, the vibration is always less. A polymer brush is the lightest type of cord brush, and the vibration with it is the smallest, but not every surface can be treated with such a nozzle. A polymer-abrasive brush is used for brushing (aging) wood, and you should not try to process metal with it.

If you have no experience with cord brushes, of course, you need to consult, and sometimes you have to purchase several different nozzles in order to determine in practice in the process of work best model. The most popular manufacturers of cord brushes, presented on the shelves of specialized stores, can be built into a kind of rating. Russian brands: Zubr, Praktika, SibrTech, Enkor. Foreign: DEXX, FIT, MATRIX, Lessmann, Wortex.

Every man in the assortment of tools should have such things as a grinder and a drill. The grinder is able to clean the metal from old paint and corrosion. In everyday life, a drill can greatly facilitate repair work if you need to stir any mixture or tighten the screws.

But each of these tools has a common goal - cleaning the surface from rust and corrosion. To do this, use metal brushes. On the Internet, you can find photos of metal brushes so as not to make a mistake in choosing. In this article, we will look at the types of brushes.

Brushes for drills and grinders

Tools such as a drill and grinders can clean any surface from rust and corrosion. Consider the main types of brushes.

cup brush

The brush is able to cope with cleaning the surface from traces of concrete and corrosion. Such a metal brush for grinders and drills is often used to process flat steel products.

If you need to process wooden surface then use a nylon brush.

Tapered brush

Such a brush for a drill and grinder is used in order to get rid of rust or other debris in hard-to-reach places. This happens because of its peculiar design of the brush.

Disc brush

If you need to clean a large area of \u200b\u200bthe surface, then it is the disk brush that is used. It has high rigidity and strength, so you can long time use it.

The metal cleaning brush is manufactured according to the latest technologies. Such a brush is commonly referred to as a brushing brush and is used in industry.

Korshchetka

Brushes are used to clean parts from rust and flux deposits. Also, if it is necessary to give the product a marketable appearance, this type of brush is used.

If it is necessary to clean a certain plane of debris, then use a nozzle with hard bristles. To complete the cleaning, use a nozzle with less rigidity. This is used so that the brush does not spoil the surface itself, but simply cleans it from the remnants of unnecessary old paint.

For right choice The best brushes for metal should be purchased from the best and most reliable manufacturers who have earned the trust of their customers.

Choose the right brush for the grinder and drill. Consider when choosing the speed for the machine. This rule cannot be ignored, because if you put a brush designed for low speed on a machine with a high speed, then there will be no result.

And such a brush will quickly deteriorate and become unusable. The same applies to metal brushes. They are designed for high speed rotation, so you should not turn it on at low speeds. So, such a brush will not give the desired result.

You should be very careful when buying, because the final result depends on it. You should purchase brushes only from reliable manufacturers, so as not to buy a low-quality brush and not waste your money.