A circle for an angle grinder from a computer disk. Attachments for grinders

Angular angles are often used for cutting metal in everyday life. grinder(angle grinder), which is usually called the “grinder”. Consumables for grinders are cutting discs.

According to the intended purpose in accordance with the material being processed, there are the following types wheels for grinder:

In contact with

for metal,
on stone.

Let's consider the labeling, main sizes, main manufacturers, and also compare popular brands in terms of price-quality ratio.

Marking circles

To choose the right cutting disc for metal, it is important read its markings correctly.

The manufacturer or brand must be indicated.
The standard should have three sizes: outside diameter(D) x thickness of the circle (T) x diameter of the mounting hole (H). In practice, only two sizes are often indicated - outer and bore diameters.
The material on which the disc is intended to work is indicated by the inscription (“metal” - for cutting metal, “concrete” - for cutting stone and concrete) and additionally by color (metal, usually blue, green - concrete). Usually the type of metal is specified with an inscription or image:
- Steel - for steels,
- Inox - for stainless steel,
- Castiron - for casting and cast iron,
- Aluminum - for aluminum and non-ferrous metals.
Circle type: 41 - flat, 42 - with a recessed center.
Based on the material of the bond, discs are divided into vulcanite and bakelite, and bakelite circles can be without reinforcing elements and reinforced with two layers of fiberglass mesh. For cutting metal, only reinforced discs are used; they are designated by the letters BU (reinforced bakelite) or Latin BF.

Important! Diamond blades are not used for cutting metal.

An example of decoding the designation

41 180×2.5×22.23 14A63H38 BU 80 m/s 2 class GOST 21963-82
41 - cutting flat;
180x2.5x22.23 - outer diameter 180 mm, thickness 2.5 mm, inner diameter 22.23 mm;
14A - normal electrocorundum (used for the manufacture of metal discs);
63 H - grit 63 (medium);
38 - sound index, corresponding to medium hardness;
BU - reinforced bakelite (reinforced);
80 m/s - maximum operating speed 80 meters per second;
2 classes - second class of imbalance;
GOST 21963-82 is the standard according to which the disk is manufactured.

Selection of cutting discs

The most common cutting wheels for metal are tool with mounting hole 22.0 and 22.23 mm. This means that it is suitable for angle grinders with a 22 mm shaft. The second standard fit size is 32 mm, but at the same time outer size the circle will be from 300 mm and a similar tool is used on machines. There are also discs with a hole of 10, 13, 16 mm, but their outer diameter is 50-100 mm and their application is limited.

Circles with a diameter of 115 used on angle grinders low power. A metal cutting disc for an angle grinder with diameters of 125 and 150 mm is used for angle grinders of medium power. On professional tools, as a rule, cutting wheels with a diameter of 180 and 230 mm are used.

When choosing thickness are guided by the following rule: the thinner the circle, the less effort is applied to cutting, and the less time is spent, and vice versa, the thicker the disc, the more time and effort will be required. The cutting coefficient of a thin disk is no less, but it is safer to work with it. This is due to the fact that thin products have greater elasticity and bending ability than thick circles.

Correspondence of the thickness of the circles to the most common diameters.

For outer diameter 115 mm standard thickness equal to 1.0; 1.6; 2.0; 2.5; 3.0; 3.2 mm with a mounting hole of 22.23 mm;
For D = 125 mm, a thickness of 0.8 is provided; 1.0; 1.25; 1.6; 2.0; 2.5; 3.0; 3.2 mm and fit 13, 20, 22, 32 mm;
D = 150 mm correspond to thickness 0.8; 1.0; 1.25; 1.6; 2.0; 2.5; 3.0; 3.2 mm, and fit 13, 20, 22.23 and 32 mm;
With D = 180 mm, the fit is only 22.23 and 32 mm, thickness - 1.0; 1.25; 1.6; 2.0; 2.5; 3.0; 3.2; 4.0 mm;
The same size of the mounting hole is provided for an outer diameter of 230 mm, with a thickness of 1.6; 2.0; 2.5; 3.0; 3.2; 4.0 mm.

When choosing hardness The principle applies: the harder the material being processed, the less the hardness of the abrasive tool should be. For cutting discs, hardness CT1, CT2, CT3 is usually used - medium-hard (O, P, Q) or T1, T2 - hard (T, S). This seemingly illogical choice occurs because the hardness of the wheel means the ability of the bond to keep the abrasive grains from chipping under the influence of the material being processed. If you choose a wheel that is too hard, the grains will become “greasy” and the cutting efficiency will be significantly reduced.

Bakelite or vulcanite?

The main difference between vulcanite-bonded cutting wheels and their bakelite counterparts is that, due to the greater elasticity of vulcanite, products can have smaller thickness and greater productivity. They are used for burn-free fine cutting of metals. Vulcanite bonded wheels can also work in the presence of emulsions, but kerosene destroys them. The main disadvantage of vulcanite is its low heat resistance, only 160-200 degrees. Therefore, as the load and temperature increase, the disk begins to perform worse.

Bakelite bonded cutting wheels are more heat resistant, but long work And heating up to 250-300 degrees become brittle and spark. By the way, it is correct to install the disk on the tool in such a way that sparks fly towards you during operation. Then, if the disk is destroyed, the fragments will fly in the opposite direction from you.

Comparison by manufacturers and prices

As a result of testing of cutting wheels of the most common brands, the efficiency coefficient of the discs was determined. The wear of the tool was measured after a series of cuts, and the tensile strength was also checked, for which the circles accelerated to speed, almost twice as high as stated.

I would like to add that the market offers products from many companies, not included in this testing. Traditionally, high-quality and inexpensive wheels are produced by the Kosulinsky Abrasive Plant, the Krasnogorsk Abrasive Plant, and the Ivanovo JSC ISMA. Good feedback and average price category have NORTON brand wheels. The choice always remains with the consumer, and promotion and high prices are not at all indicators of quality.

(angle grinder) – the so-called “ Bulgarian" - is one of the most common and universal tools, available in the arsenal of professional and home craftsmen and used in construction, production, and everyday life. The functionality of the grinder is expanded by sets of consumables - all kinds of disks and attachments for various operations using rotational movements of the tool: grinding, polishing, roughing, cutting, sharpening, stripping, etc.

For example, in the case when the surface area being processed cannot be perfectly lined, the problem of cutting ceramic tiles arises. If you have a tile or glass cutter on hand for more thin materials– no questions will arise, but what if it’s just a Bulgarian? We should immediately make a reservation: cutting tiles is not at all a specialized functionality for an angle grinder, but by choosing the right cutting wheel, you can cope with this task.

Construction of abrasive wheels

Cutting wheels for grinders represent a surface round shape with a central hole reinforced with a metal ring for fixing the tool itself on the spindle. The working surface of the disc is made of abrasive particles held together with a binder. The characteristics of the abrasive, primarily its hardness and grain size, affect the quality of the work performed. Abrasive chips can be made:

from zirconium corundum and electrocorundum;
silicon carbide;
aluminum oxide and others.

To ensure additional strength and safety during manufacturing, the disc is laid in several layers synthetic reinforced mesh .

So, for processing metals, finishing natural and artificial stones, brick, concrete and ceramic tiles, various abrasive discs are used. To somehow organize all the variety of attachments for an angle grinder, use generally accepted classification and labeling.

Types of cutting wheels

This type of replaceable attachments for an angle grinder is perhaps the most common among others, since various types of cutting work account for two-thirds of the total volume. As a cutting element, cutting discs are used when working:

for metal— the thickness of such a disk, due to high torque and serious load, is proportional to its diameter and can be 1...3.2 mm with a range of external diameters of 115 and 125 (for small angle grinders), 150 and 180 (for medium ones), 230 mm (for grinders with power over 1500 W);

on stone– such circles are used for sawing concrete, brick, slate, paving stones, ceramic tiles and metal granite (one of the types of diamond blades);

woodworking– discs of this type have various sizes cutting segments and special notches instead of grooves (I would like to note that this type of disc is extremely dangerous to work with due to the high speed of the grinder);

stand in a separate class diamond discs with application of diamond coating on the outer cutting layer. Diamond wheels are used for dry (segmented blade type) and wet (solid blade type) cutting, as well as cutting combined type. Cutting materials can also vary, from stone and metal to plastic and rubber. Read more about diamond discs.

You should also distinguish between discs for professional work and household use. Suitable for one-time household work on bricks and tiles inexpensive options from "Sparta" or "Tsentroinstrument". Professional circles (for example, Distar or Bosch) are 3-4 times more expensive than household ones, but their durability is approximately the same. Such discs are clearly graded according to the type of material - marble, ceramic tiles and porcelain stoneware, for concrete and reinforced concrete, fire-resistant. It is highly recommended to use professional wheels according to the intended purpose. Standard diameter sizes from different manufacturers vary from 115 mm to 350 and 400 mm.

Grinding and polishing discs

Depending on the type of material being processed and the required quality of its grinding or polishing, discs with different working surfaces are used:

sponge or fabric– are used, as a rule, in combination with special pastes or liquid means;
felt solid or performed on plastic base with many transverse, densely planted felt petals, also used with polishing pastes;
wheels with replaceable sandpaper different thicknesses and fine abrasive for cleaning and grinding.

For convenient and high-quality processing For large surface areas, rough grinding of logs and rounding the edges of various products, grinding discs of a special conical shape are used.

Grinding and polishing discs are suitable for cleaning and polishing various types of surfaces to an ideal state: from steel to metal alloys; they are actively used in car services when processing body coatings.

Safety precautions when working with grinder discs

For anyone construction tools strict adherence to safety rules is required, and the grinder is no exception. Here are some of them:

When working with any type of consumables a special shield should be used, protecting the face.
The tool must be held in such a way that the disk or attachment rotates in the direction from the worker person with him.
Should be individual for each material maintain the required rotation speed.
Don't use discs, designed to work with one type of material to process materials of another type.
Do not use the tool itself for work, not provided for by it technical characteristics , specified by the manufacturers in the passport.

If you follow these simple but necessary recommendations and the instrument will serve long and happily, and the health of the master will not be in danger.

Summarize: when choosing and purchasing discs for an angle grinder, you must first of all take into account the intended operations and types of surfaces to be processed. And following safety rules when working with them will extend the life of the attachments and tools.

You also need to choose the right disk.

Using various attachments for angle grinders, you can cut, clean and polish metal, as well as many other materials. Among the variety of metal discs for grinders, making the right choice is sometimes difficult even for a professional.

This article will help you understand the types of consumables and the features of working with them.

In my own way functional purpose, attachments for grinders are divided into:

Cut-off. The most common type of discs used in grinders. They are used for cutting materials various densities and origin. Circles for working with different materials, differ in design and cutting method.
Grinding and polishing. With their help, the surfaces of the part are given a mirror smoothness or irregularities are removed.
Sharpening and roughing. Purpose: sharpening tools and cleaning parts from paint, rust and other deposits.

Cutting wheels

Depending on the type of material being cut, there are several types of cutting consumables:

1. For cutting metal. Designed for cutting metal products. They vary in thickness and outer diameter.

The smallest is a cutting disc for an angle grinder 125 mm, and the largest is 230 mm. Thickness varies from 1 to 3.2 mm. The larger the diameter of the disc, the thicker it is. However, small nozzles can have any thickness. This relationship between diameter and thickness is determined by the rotation speed.

2. For cutting stone.

The design and method of using such attachments are completely identical to consumables for metal, the difference lies in the abrasive materials used for their manufacture.

3. Wood sawing machine. Work using sawing replacement elements on wood is very dangerous and can cause injury to a person. This design is a thin metal disk with sharp teeth.

When rotated, it cuts wood with ease. However, if it jams, the angle grinder may be torn out of the worker’s hands, as a result of which he may be injured.

To avoid such incidents, when cutting wood, it is recommended to follow the following instructions:

It is strictly forbidden to remove the protective casing from the angle grinder.
It is necessary to use a replaceable element with a fine tooth.
You cannot use a powerful feed, as if it jams, the tool will inevitably fly out of your hands.
If necessary, cut wood large sizes powerful grinder, you should use special fastenings (equipment) for it.

4. Diamond blade. It is essentially universal, with which you can cut materials of any hardness, from the softest to the hardest. Most often, consumables of this type are used when cutting reinforced concrete, porcelain stoneware, stone and tile.

For various types material being cut, diamond blades of various designs are used.

According to the design of the cutting edge, nozzles are distinguished:

With continuous cutting edge.
With cutting sectors.

By the amount of spraying:

Large diamond coating.
Fine spraying.

An example is diamond replacement elements for cutting concrete, which have a cutting edge divided into sectors and coated with small diamonds. In contrast, discs for stone work are a solid circle.

By appearance, it is almost impossible to determine the purpose of a diamond consumable, so when purchasing, you should carefully study the packaging. It displays all the information about this tool.

Grinding and polishing models

A huge variety of products are produced for angle grinders Supplies allowing grinding and polishing of various surfaces.

According to the type of coating used, discs are divided into:

With sandpaper.
Spongy.
Felt.
Fabric.

In addition to your own grinding coating, you need to use fine abrasive pastes in conjunction with many replacement materials.

Rough surface grinding is done using fine abrasive grinding wheels. Final polishing is carried out with a cloth or felt nozzle.

Sharpening and roughening attachments

For peeling various surfaces, replacement elements of various configurations are produced.

The most common ones are:

1. Twisted cones. Metal grinding wheels for grinders are indispensable if it is necessary to clean the surface from old paint or cement mortar. The twisted cutter consists of steel cups with steel wire brushes installed on their edges.

The diameter of the wire depends on the required stiffness of the brush. The stiffer the cutter, the thicker the wire.

2. Sharpening consumables. Used for rough processing metal products, such elements can be used to clean welds or sharpen tools. Grinding wheels of small diameters have become widespread. Since it is more convenient to carry out such types of work with a small grinder.

The sharpening attachment is easy to distinguish from the cutting attachment, thanks to its large width (at least 5 mm) and the recess on inside, due to which, you can sharpen the tool with the flat side of the wheel.

3. Diamond grinding elements. Distinctive feature of this type disks, is that the work is performed only by the peripheral part of the nozzle, on which diamond coating is applied. In terms of other properties, such a replaceable element is similar to an abrasive one.

Diamond consumables are used for peeling stone, concrete and similar materials. This design is ideal for removing small areas of concrete screed.

Marking

On the front side of the disc for the grinder, all the information necessary for the master is indicated.

When choosing, you should immediately pay attention to its specialization. Also, the outer diameter, shelf life and maximum speed at which it can operate without breaking down are indicated.

The expiration date is a very important parameter; after it has expired, it is better not to use the element.

The dimensions of cutting wheels for metal for an angle grinder are marked on outside nozzles and consist of three parameters separated by an “X” symbol. Disc dimensions are characterized by outer diameter, thickness and bore diameter, standard size which is 22.2 mm.

The outer diameter determines which grinder it is suitable for. It corresponds to the sizes of angle grinders; consumables are available in 115, 125, 150, 180 and 230 mm.

Installing a circle with a larger diameter than the grinder is designed for is strictly prohibited!

The thickness of the circle determines the ease of cutting; the thinner it is, the easier and faster you can cut any structure. However, a thin element is easier to break during the cutting process, although for low-power (battery-powered) grinders, the use of wheels of this thickness is most optimal.

Specification cutting disc encrypted in a four-digit code containing information about the main components that make up the cutting grains and bonds. When choosing a replacement element, it is important that its purpose matches the type of material being cut, otherwise the cutting quality will be poor and the disc may break.

Features of consumables for cutting aluminum

Right choice disc for an angle grinder (angle grinder) is a key condition for achieving the desired result when performing certain work. In this case, you should not only focus on the dimensions of the circle, including thickness, landing or maximum diameter, but also the purpose, compliance with GOST and other parameters. After all, each type of nozzle is effective only when solving certain problems.

Purpose and types of disks

Wheels for grinder - consumable tool in the form of a circle (bowl) with a special cutting, cleaning, grinding or other edge and a mounting hole for fixing on the angle grinder shaft. Depending on the execution and purpose, there are several varieties:

Cut-off

They are characterized by a small thickness of 1–3.2 mm with an outer diameter of 115–320 mm and a specific cutting edge. Often they stand out from other analogues with a certain marking color, taking into account the material for which they are intended for cutting:

Roughing and stripping

The working part is in the form of a steel cup or two combined disks, along the edge of which twisted rollers, brushes or simply metal wire are mounted. Designed to remove rust, corrosion and various coatings- paint, varnish, polymer, dried cement, etc. Indispensable for body repairs of cars, various machines and equipment. The cross-section and strength of the wire determines the degree of processing.
There are diamond and abrasive grinding discs with working edges like grinding wheels. Used to remove plaster, concrete, stone and other high-strength finishing coatings.

Grinding and polishing

The grinder is an angle grinder, so its strong point is scraping parquet, rough and finishing various surfaces, ends and edges. With this in mind, there is an extensive range of grinding and polishing discs, including:

cord brushes - roughing for leveling or cleaning the surface;
end abrasive attachments - specially designed for grinding the ends of parts;
petals - special discs in the form of abrasive cloths of various grain sizes, its degree determines the quality of grinding;
felt (fabric) wheels - ideally suited for mirror polishing, including using a special liquid or fine abrasive paste;
fiber tips - a good option for processing metal surfaces;
chain and solid-type planer wheels should be used exclusively with grinders equipped with additional handles, which allow for rough processing of logs, timber and other types of wood.

Milling

Nozzles in this category are produced in two types: circles and cutters. In the first case, the structure of the lateral working surface of the disk resembles a rasp. Used for rough processing of wood. Milling cutters differ in both size and tooth configuration. Allows you to perform the following operations:

cutting grooves;
selection of bowls and recesses;
processing of edges and ends;
cutting small-sized workpieces, etc.

Sharpening

Traditional discs, identical to those for sharpening machines. The key difference from abrasive cutting analogues is the thickness and the ability to process parts with the side part. The cross-section is at least 5 mm. In addition to sharpening tools, they can be used to remove welding seams and other types of rough metal grinding.

Features of marking discs for grinders

Along with the bar code of the country of manufacture and purpose, the following data is indicated on the marking of discs for an angle grinder:

characteristics, for example, diamond, abrasive, etc.;
dimensions: outer diameter of the cutting edge, thickness and diameter of the mounting hole in mm;
maximum angular velocity;
maximum rotation speed;
work angle;
what operations are prohibited to perform;
safety instructions in the form of pictograms;
date of manufacture and expiration date.

Plus, you can find out other information from the manufacturer. For example, compliance with certain standards, regulations, in accordance with which the product is manufactured, etc.

Corner Grinder, which is popularly called more simply - a grinder, the tool is absolutely useless in the absence of appropriate attachments - abrasive or diamond wheels. Their choice is an extremely important and responsible process, because it will directly affect not only the quality of the work performed, but also the level of safety of the person who will do it. Among the criteria by which the mentioned special circles are grouped are the composition (source material), shape, and dimensions of the discs for the grinder. Special attention It is worth paying attention to the last of the listed parameters.

What are the diameters of discs for grinders?

On this moment Manufacturers of consumables for angle grinders supply the market with wheels whose diameter ranges from 115 mm to 230 mm. More precisely, tool owners are offered attachments with diameters of 115 mm, 125 mm, 150 mm, 180 mm and, of course, 230 mm. Such dimensions are optimal for performing amateur or repair work private houses and apartments. Despite the fact that the seat diameter of any grinder disc is usually 22.2 mm, the attachments different sizes designed for different machines, and this is explained by varying power. It’s easy to guess that 115-125 mm discs are intended for low-power grinders, 150-180 mm for medium-power grinders, and 230 mm for high-power grinders (over 1500 W).
It is worth noting that there are circles with large diameter, but they are usually used on industrial enterprises, since they are part of stationary machines. It is not recommended to use large discs on relatively small angle grinders, as this is unsafe and may cause Negative consequences for good health.

Dependence of disk thickness on its diameter

Those who are going to carry out work of one kind or another need to know that the diameters of the discs for an angle grinder are also reflected in their thickness. For example, if a thin, neat cut is required, it makes no sense to use an impressively powerful grinder with a disk larger than 230 mm, since its thickness is over 3-4 mm. But if we are talking about cutting railway rails or thick pipes, then, on the contrary, using a disk of medium thickness (about 1.6 mm) is not rational, since it will probably lead to its destruction and the lack of results.
In other words, in each individual case it is important to choose a nozzle of the correct diameter and thickness, as well as work with an angle grinder of the appropriate power.
If you are in doubt about choosing a disc for an angle grinder, or have difficulty deciphering the markings, just fill out the form on the website or call the specified contact phone number, and our managers will help you make your choice. A wide range of diamond blades is presented in the section