Discs for angle grinder 125mm what are

Heating nut

The nut can be heated with a gas torch, hot air gun or blowtorch. The heated flange can usually be unscrewed with a standard angle grinder wrench.


If it is necessary to remove a layer of paint or other application, as well as rust from any surface, use a brush. They are disc-shaped or in the form of a bowl with built-in metal wire.

discs, angle, grinder

The wire in these attachments can be twisted or loose. Its thickness can also be different. The thicker the wire, the coarser the roughing is used for the roughing disc or bowl, and vice versa.

Typical disc sizes

When choosing a disc for an angle grinder, make sure that the outer diameter of the attachment does not exceed the maximum allowable values ​​for your angle grinder. For example, if an angle grinder is designed to use a wheel with a maximum diameter of 125 mm, then a 230 mm wheel cannot be mounted on it. And there are several explanations for this:

  • the linear speed of the cutting edge will be exceeded, which is fraught with destruction of the abrasive wheel and injury to the user;
  • a small angle grinder does not have enough power to work with a large tool;
  • the installation of a nozzle that exceeds the permissible dimensions requires the removal of the protective casing, and this is already a violation of safety rules.

Angle grinder discs come in standard sizes 115, 125, 150, 180 and 230 mm. In modern grinders, the landing diameter (the diameter of the shaft on which the tool is installed) is practically the same and is equal to 22.2 mm. If you have an outdated angle grinder “lying around”, then you will need to use adapters. rings of different diameters.

All abrasive wheels of any size have a special marking, from which you can find out the following information: the diameter of the disc and its thickness, the diameter of the seat, the maximum rotation speed, as well as for the processing of what materials it is intended.


To sharpen the tool, grinding machines (sharpeners) are usually used. But if you do not have the latter, but you have an angle grinder, then you can purchase a sharpening (grinding) wheel for it, with which you can easily sharpen almost any cutting tool.

The main difference between sharpening wheels and cut-off wheels is their thickness (at least 5 mm).

Spinning methods if the disc is jammed

What to do if the hold-down flange is stuck? This nuisance, when the nut is bitten, often occurs if, while working with thick and durable materials, the tool is jammed in the workpiece. In this case, the abrasive wheel often breaks, and the spindle continuing to rotate tightly tightens the clamping flange. There are several ways to spin an angle grinder if the disc is jammed.

How to properly change a disc on an angle grinder

Since the wheels for an angle grinder are consumable, sooner or later they have to be changed. They are attached to the spindle of the angle grinder using a clamping flange (nut) with an M14 thread. To unscrew it, a special open-end wrench with pins on one side must go to the angle grinder.

So, to replace the tool on an angle grinder, follow these steps.

  • De-energize the device by unplugging the power plug.
  • Lock the spindle of the angle grinder using the button located on the front of the housing. When the button is pressed, the stopper enters the hole of the disk installed in the gearbox, which fixes the spindle in a stationary position.
  • Insert the pins of the key into the holes on the pressure flange.
  • While holding the latch with one hand, turn the wrench to the left (counterclockwise) with the other hand until the nut comes loose. Then it can be unscrewed without a key and removed from the shaft. In this case, the spindle of the angle grinder rotates clockwise. But in which direction to unscrew the nut if your apparatus rotates the shaft counterclockwise? Remember: the clamping flange should always be unscrewed in the direction opposite to the rotation of the shaft.
  • Now you can change the tool after removing the old one. If you notice that dirt has accumulated inside the casing, then you should remove the lower flange and use a steel brush to remove dirt from all surfaces.
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  • Screw the flange onto the shaft by hand. Tighten the nut until you can no longer turn it without a key. After that, holding the stopper, tighten this nut with a wrench, but no more than a quarter of a turn, otherwise the disc will begin to deform.
  • After carrying out the above steps, the replacement of the tool is considered complete.


    Grinding discs and attachments are used for grinding and polishing various surfaces (metal, wood, plastic and others). Often a flap type grinding wheel is used for grinding. It consists of many “petals” made of sandpaper. The grit of the sandpaper can be selected based on the required type of processing (finishing or roughing).,

    Also, the sandpaper can be attached to the nozzle with Velcro. Such a tool is screwed onto the spindle of an angle grinder.

    For surface polishing, special wheels and attachments are produced that look like felt pillows or fabric discs.

    With a gas wrench

    This method is considered not entirely safe, since the stopper can be broken, although in most cases, it is possible to unscrew the nut. To avoid breaking the spindle lock, do not apply too much force to the gas wrench. Retainer is designed to withstand the force of a standard wrench.

    An overly tightened flange can be unscrewed using 2 gas wrenches. To do this, break off the protruding ends of the abrasive wheel with pliers so that you can reach the bottom flange with the first gas wrench. Next, tighten both flanges with wrenches and turn them in opposite directions (taking into account which thread on the spindle is right or left).

    What is an angle grinder and what is it for?

    The original purpose of the tool was only for cutting the inner corners of large and hard-to-reach parts. Hence the name. angle grinder or angle grinder. But in the future, the scope of application expanded, and today the main purpose of the angle grinder is cutting metal and stone.

    What are the disks for an angle grinder?

    A real owner for household needs and at work must have an angle grinder. But without suitable circles, it is not always possible to achieve the desired result. Therefore, special attention is paid to their selection.

    Types of grinding discs

    Grinding wheels are flap and abrasive. Both are equally effective. But when working with an abrasive look, such irregularities in the surface of the material are also removed, such as residues from welding, burrs from metal and others. Petal discs function more smoothly. Solid elements can also be removed, but the embossed surface in general will be better processed.

    There are other types of attachments. Recently, Velcro attachments have become very popular. They are acquired when it is necessary to perform frequent grinding of metal.

    Other interesting attachments are the brushes, which are successfully used for grouting and cleaning various surfaces. It is often a good alternative to an abrasive grinding wheel.

    Types of disks by functionality

    Different types of work can be done with an angle grinder. For this, special discs are purchased. Some types include:

    for grinding of various degrees (you can perform both coarse sanding and mirror polishing);

    for removing rust and paintwork.

    Cordless Brushless Angle Grinder from banggood [unbox/review/first test] 125mm disc conversion

    Abrasive discs

    They mainly use abrasive discs for cutting metal and stone. Previously, they were fragile, and therefore dangerous to use. But today such circles have a multi-layer structure, due to which the use has become harmless. The abrasive is located between the layers. It scrapes off a thin layer of the material being processed. Thus, the cutting line is polished.

    Types of cutting discs

    The most popular are cutting discs. Thanks to them, it is possible to cut any hard material, such as metal, concrete or stone. In some cases, this tool is indispensable.

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    Wood discs are considered traumatic. Therefore, in some cases, it is better to find more suitable tools for processing. But diameters 115 mm and 125 mm are acceptable for this purpose.

    Disc sizes

    Not only angle grinders are different, but also their circles. The first thing that catches your eye is the difference in the diameter of the parts. For this parameter, disks are:

    But the most common diameters are 125 and 230 mm.

    The smallest size a disk can have. It is rarely purchased. However, if it is necessary to perform specific work, sometimes you cannot do without it.

    Angle Grinder Disc Types in Detail

    The diameter is optimal for housework that is required from time to time. It is a small and very convenient tool that can be operated with one hand.

    Despite the fact that the sizes of the circles are not as popular as others, they are sometimes chosen. For example, when constant work is required around the house, for example, when carrying out repairs, then a diameter of 125 mm will clearly not be enough. The tools are considered semi-professional.

    This disc is purchased when you need to work in a constant mode with thick material. The nozzle is distinguished by its high performance, and therefore it is precisely it that is chosen for professional purposes.

    Which discs for an angle grinder are “so-so”, and which are good and long-lasting.

    For many people who have just bought an angle grinder, the problem of choosing cut-off wheels arises. an angle grinder is a multifunctional tool, it can perform various types of work, respectively, and all kinds of circles and nozzles on it, the darkness is darkness. Let’s see what work can be done with an angle grinder and what nozzle discs are used for this. This article will focus on cutting wheels.

    10 Amazing & Useful Angle Grinder Disc !!!

    Of course, most often an angle grinder is used when you need to cut something, 70 percent of the work is cutting work. You can cut anything with a machine, from metal to various tiles and even wood. Of course, when using an angle grinder, read the instructions carefully, since many household models are not designed for sawing, for example, a stone, since sawing dust clogs the grinder mechanism and it breaks down. In particular, Sturm models, in the passport of which it is written in black and white that they should not be used for sawing stones. Therefore, when choosing an angle grinder, ask if you can cut a stone with it. Indeed, very often when doing household work, it is necessary to saw a ceramic tile or cut off a piece of brick. So, what kind of cutting wheels are.

    Sawing metal is the primary use of an angle grinder. There are a great many types of cutting wheels for metal. Most often, the circles of the Luga plant are used, although they are so-so in quality, they are quickly erased and a lot of dust is released during the file. But also, then the same Khitachevsky 45 rubles. In appearance, the Hitachi circle cannot be confused with the usual one, it is all bright green.

    The main standard sizes of wheels for metal for an angle grinder: Inner hole 22.2 mm Outer diameters: 115, 125, 150, 180 and 230 mm. As you guessed, discs with a diameter of 115 and 125 mm are used on small angle grinders, 150 and 180. on medium ones, 230 mm. discs for a large angle grinder (power from 1500 watts and above).

    Stone circles are used for sawing bricks, concrete, slate, porcelain stoneware, ceramic tiles, paving stones. Dicks on a stone are diamond and “dry cutters”, the difference in price between them is high. A regular stone disc (Luga abrasive, Bosch). looks the same as a disc for metal, only it is written on it that it is stone. Such discs cost much less than diamond discs, but they wear out faster. You can use it on white (silicate) bricks, paving stones, slate. They can no longer take concrete, as well as tiles, for cutting which a diamond disc is simply necessary. Note that a Boshevsky circle on a stone costs about 100 rubles, meadows. 40 rubles, the difference between them is noticeable.

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    Diamond wheels are classified into 3 types: dry, wet and combined. Such discs are made of iron, with a diamond layer applied to them around the circumference.

    It is divided into segments along the entire circumference, thanks to which there is a much better cooling of the circle. Of course, you know that when cutting a stone, the cutting dick heats up very much, so it is necessary that it be cooled. By the way, you can cut with a diamond blade for no more than 2 minutes continuously, so the diamonds will not fail. In such a circle, they saw red brick, white silicate, paving stones. The main purpose is concrete sawing. Of course, they can also cut tiles, but it is better to use a wet cutting disc for it.

    Solid diamond wheel, the wheel is cooled with water. Most often they are used on special tile cutters. electric machines with water supply. Ceramic tiles and porcelain stoneware are sawn on them. For an angle grinder, there are also such circles; they cut tiles with them, which are pre-moistened with water. Angle Grinder Sizes. Inner Diameter (Fit) 22 mm For Tile Cutters. 2 types fit, 22 mm and 25.4 mm.

    Combined diamond cut-off wheel dry / wet. “Turbo” series.

    A versatile diamond wheel with which you can cut any stone. It has proven itself excellently when cutting tiles “dry”, cuts brick, concrete and other stone like clockwork. Cooling is due to the wave-like structure of the disc.

    Let’s figure out which diamond circles are better, because it often happens that you bought a circle and hope that it will last for a long time, but after a short period of time it no longer saws. Discs, just like power tools, are professional and household.

    You need to saw off a piece of brick or cut off a couple of tiles. for this, discs for household use. Quite good options for the firm “Zubr”, “Sparta”, “Tsentroinstrument”. Their diamond quality is not bad, if you use such a circle infrequently, for domestic purposes, then it will last for a long time. The most important thing is to use the diamond correctly, namely, you cannot cut metal, you cannot work continuously for a long time. If the circle does not cut, it is necessary to “open” the diamonds by making several cuts on fireclay (yellow) or red bricks 115-125 mm. 150-200 rubles.

    If you have a production, even a small one, household discs will not last long, so you need to think about purchasing a professional tool. The price for them is high, about 3-4 times higher than for household ones. However, the durability is also impressive. I remember that when I was working as an engraver-stonecutter, we sawed granite all season in one circle, every day. And he survived. There was that circle of DISTAR. the coolest, in my opinion, professional diamond discs. Therefore, if you have a production, you are engaged in laying tiles, paving stones and, by the nature of your activity, saw stone every day, then it is difficult to find a better choice than Distar discs. I definitely recommend.

    Approximate Note that they have a clear gradation of discs. there are purely marble, granite, porcelain stoneware, ceramic tiles, refractory, concrete, reinforced concrete. So everyone will find a disc specifically for his work. And this is very important, because if you use the disk for its intended purpose, then its service life is significantly extended. Well, the standard sizes of disks from the Distar company are simply super. starting from 115 mm for a small angle grinder and ending with large circles for machine tools and wall chasers. sizes 350 and 400 mm.

    Also, as an alternative, you can try Bosch circles, they are also praised.

    I think my review will help you choose the right diamond cut for your needs, and the recommendations will extend the life of the wheel. Happy cutting))