How to properly fix the disc on the grinder

Method 3

Tapping with a chisel. You need to machine the spindle shaft with a regular WD 40 and wait 15 minutes to make the job easier. Then you need to put the chisel at an inclined surface into the hole of the flange and gradually unscrew the mount with tapping movements. This method also has a drawback. you can damage the hole or spoil the flange of the grinder.

How to change a disc on a grinder video

Angle grinder is a universal power tool. It can be used to cut steel profiles and wood, process concrete and stones, perform grinding and roughing work, sharpen hacksaws. And for each operation, a certain circle is provided. For example, you cannot grind surfaces with a thin cutting wheel for a grinder. it will quickly break. How to put the disc on the grinder correctly when grinding and breaking a circle or switching to another type of work?

According to the instruction manual, replacing the disc on the grinder should be done as follows.

  • Unplug the power tool cord from the socket.
  • Press the spindle rotation lock button.
  • While holding the grinder’s stopper button, unscrew the flange nut using an open-end wrench. Turn the key for angle grinder in the direction of rotation of the disc. If it is difficult to press the button with one hand and use the key with the other, ask someone close to you to help you.

An open-end wrench should be included in the delivery set of the angle grinder. A poor quality key often goes to cheap grinders. It can quickly break (however, this happens with tools from leading manufacturers). In the end, the key can simply be lost. How to properly install the disc on the grinder in this case, without having a suitable tool at hand?

Method 4

You can heat the nut with a gas burner. In this case, you should be able to unscrew it by hand. Be sure to use heat resistant gloves after heating the workpiece. This method is the most risky, as you can overheat the oil in the tool or damage the gearbox by heating.

Method 2

You can make a simple homemade key for the grinder. To do this, you need a long nail, from which you need to saw off the head, and bend the tip so as to give the nail a U-shaped shape. The nail must be bent so that the ends of the workpiece fall into the flange posts. If the nut is twisted very tightly, then you can strengthen the structure with the help of a metal bar, with which you need to rotate your key. This method does not damage the structure of the grinder, but it will take time and a tool to make such a key.

Method 1

Use a regular gas wrench. You need to grasp the nut with an adjustable gas wrench and carefully unscrew it, without applying great force. This method has a big drawback. you can crush the nut or break the rotation lock. with too much effort.

How to change a disc on a grinder without a key

How to change a disc on a grinder without a key?

Use the gas key. Grasp the nut with an adjustable pipe wrench and loosen it carefully, without applying great force. Disadvantage: you can crush the nut, break the rotation lock.

Make a homemade key for the grinder. To do this, you need a long nail (at least 100 mm). It is necessary to cut off the cap, the point and give the nail a U-shape. It should be bent in such a way that the “tool” stands fall into the holes of the flange. If the nut is tightened tightly, insert any metal bar between the posts of the nail and, holding it with both hands, rotate the structure in the direction of the circle’s movement. At this time, you need to press and hold the spindle lock button. The method is safe, but it takes time and additional tools. a hacksaw, a vice, a hammer.

Tapping with a chisel. Before changing the disc, you can treat the spindle shaft with WD-40 fluid and wait at least 15 minutes. Then place the tip of a thin chisel at an angle to the hole of the flange nut and gently tap on the entire surface of the hole with a metal hammer. Sooner or later, thanks to gentle tapping, the nut will slip off, and it will be possible to unscrew it manually. The disadvantage of this method is that you can damage the holes and spoil the flange.

Heat the nut. If it is difficult to unscrew the angle grinder nut by hand, you can heat it up a little with a gas burner or autogenous gun. Unscrew the flange with gloves so as not to burn yourself. This is the most risky of the proposed methods. Can overheat bearings and oil in angle grinder gearbox.

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Finally, I would like to mention a few important points regarding replacing a disc on a grinder.

The main thing is that when changing a disc on a grinder, do not violate safety precautions and perform all manipulations with the tool turned off from the network.

How to change a disc on a grinder without a key?

Use the gas key. Grasp the nut with an adjustable pipe wrench and loosen it carefully, without applying great force. Disadvantage: you can crush the nut, break the rotation lock.

Make a homemade key for the grinder. To do this, you need a long nail (at least 100 mm). It is necessary to cut off the head, the point and give the nail a U-shape. It should be bent in such a way that the “tool” stands fall into the holes of the flange. If the nut is tightened tightly, insert any metal bar between the posts of the nail and, holding it with both hands, rotate the structure in the direction of the circle’s movement. At this time, you need to press and hold the spindle lock button. The method is safe, but it takes time and additional tools. a hacksaw, a vice, a hammer.

Tapping with a chisel. Before changing the disc, you can treat the spindle shaft with WD-40 fluid and wait at least 15 minutes. Then place the tip of a thin chisel at an angle to the hole of the flange nut and gently tap on the entire surface of the hole with a metal hammer. Sooner or later, thanks to gentle tapping, the nut will slip off, and it will be possible to unscrew it manually. The disadvantage of this method is that you can damage the holes and spoil the flange.

Heat the nut. If it is difficult to unscrew the angle grinder nut by hand, you can heat it up a little with a gas burner or autogenous gun. Unscrew the flange with gloves so as not to burn yourself. This is the most risky of the proposed methods. Can overheat bearings and oil in angle grinder gearbox.

Finally, I would like to mention a few important points regarding replacing a disc on a grinder.

    On the angle grinder, you need to install circles of a suitable size. It is necessary to strictly observe safety precautions and in no case remove the protective cover in order to install a disc of a larger diameter. When choosing a disc, you need to take into account the model of the power tool, its power, spindle speed.

The main thing is that when changing a disc on a grinder, do not violate safety precautions and perform all manipulations with the tool turned off from the network.

The main question: How to choose the right disc for a grinder?

When choosing equipment for angle grinders, first of all, you should decide on the type of proposed work. The choice of the type of disc will depend on this. We also want to mention that when choosing a consumable, be sure to take into account the power characteristics of each specific model. Examine the labeling. Often, it is printed on the disc itself and includes a set of symbols by which you can determine the relevance of this consumable to perform the intended work.

Also, focus your attention on such a parameter as the diameter of the disc. In no case should it exceed the size of the protective cover on the particular tool model. The size range of discs is usually represented by the following diameters: 115, 125, 150, 180 and 230 mm. The most common diameters are 125 mm. and 230 mm. They are optimal for most types of work and the capabilities of the tool itself.

Among the grinding discs based on bakelite, the most popular discs with a thickness of 6.00 mm. This parameter depends on the total diameter of the disc. The relationship is as follows: the larger the diameter of the disc, the greater its thickness and vice versa.

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What to use to install the disc?

In fact, the process of installing a disc into a grinder is not so difficult. However, in order to do such work, it is necessary to take into account certain rules and use certain tools.

In particular, the installation may require:

  • The key with which the nut is loosened.
  • Next, you need the disk itself.
  • A hole or chisel may be needed. These tools must be used in the case when the disc is jammed and it will have to be removed by opening, which means that the residues in the gap can be eliminated with a chisel. You may not need these tools, but keep them close at hand.

remove the disc from the grinder

How to change a disc on a grinder to avoid parsing the tool and intensive impact on it? To do this, we crumble the disc as much as possible, dismantle the protective cover of the grinder and remove the rest of the circle with a hacksaw.

Install angle grinder disc | Angle grinder safety

When carrying out all the above manipulations, do not forget about safety precautions.

properly, disc, grinder

Take care of yourself and the safety of your instrument.

Make it a rule that the replacement of cutting and grinding wheels on the grinder is carried out with work gloves, and the work itself must be carried out in special protective glasses.

Grinder discs differ in the following main features:

  • Outside diameter;
  • Disc thickness;
  • The material from which the disc itself is made;
  • The characteristic of the maximum rotation speed;
  • And, of course, the area of ​​the proposed work.

For the best understanding, let’s look at the main types of grinder discs and give a definition of their application:

  • Cut-off wheels. These are the most widely used grinder consumables. Their main purpose is to work with metal, stone and wood. A variety of cutting wheels for the grinder are diamond discs. This is a heavy-duty tooling for the processing of materials of increased strength, such as reinforced concrete, tiles, porcelain stoneware, marble.
  • Grinding and roughing discs. As the name implies, this type of disc is used for grinding various materials, for example, polishing products made of stone, or for removing (peeling) the top layer, for example, removing a layer of rust or old paint coating.

Advice

If you had to use a gas wrench, you must remember about the very powerful shoulder of such a wrench and about the effort that is applied to the parts of the “grinder”. If you do not act carefully, the spindle lock could be ripped off or the gearbox could be damaged.

All manipulations with the disc of the angle grinder must be carried out with the power supply completely disconnected (the plug must be removed from the socket). Any inadvertent pressing of the start button will cause the electric motor to turn on, and the rod rotation speed is very high. In this case, injuries cannot be avoided.

Working with a grinder involves a large amount of waste in the form of metal or wood shavings and dust. Before starting work, you must wear special safety glasses: they will protect your eyes from fragments of the cutting wheel itself in the event of its jamming and destruction.

Glasses are needed not only as a safety element. If the eyes are protected, more attention can be paid directly to the work of the “grinder”, to ensure the correct cut or the choice of the correct operating mode. This will allow the most efficient use of consumables (cutting wheels), minimizes the occurrence of abnormal situations with a biting disc or its destruction.

A protective mask that completely covers the face will perfectly replace glasses. this is especially important for a visually impaired master who wears diopter glasses, on which safety glasses cannot be worn.

properly, disc, grinder

The disc on the “grinder” can be installed both “away from you” and “towards you”, depending on the direction of rotation and, accordingly, the flow of chips. This does not make a fundamental difference in work. However, the “grinder” with a circle “on itself”, when biting the disc, tends to jump out of the cut forward, and not on the one who uses it. This is especially important when working with powerful tools, but a small angle grinder can pose a serious danger.

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A specially mounted extension cord with a plug socket, preferably without grounding, will help to quickly stop the operation of a machine that has escaped from the hands.

“Bulgarian” is a rough processing tool and it is not worth striving to obtain an ideal surface as a result of its work, the main thing is to make a rough cut, which later, if necessary, can be processed in other ways.

To work without clamps and jamming, it is better not to cut long metal workpieces to the end, leaving 1–2 mm of metal in the cut: they will be easy to break off afterwards, this will practically not affect the quality of the workpiece.

It is better to place small workpieces in a vice or press them with a clamp to a workbench or other reliable horizontal surface. The quality of the cut and safety depend on the density of pressing.

You can see how to put the disc on the grinder correctly in the next video.

Cutting wheels for a grinder, in turn, have their own subspecies, such as:

  • Cut-off wheels for metal work;
  • Abrasive wheels for working with stone;
  • Wheels for woodwork;
  • Diamond discs (mentioned above).

How to change the disc on an angle grinder?

The purpose of each type of disc usually corresponds to its name.

cutting disc safety basics-How to properly use an angle grinder with cutting disc

Among the grinding discs, there are four main subtypes. flap, wire, diamond and bakelite-based grinding discs (straight, T41 profile and disc-shaped, T27 profile).

  • The flap disc is made from sandpaper. Its main purpose is to remove existing coatings such as old paint, primer or paint coat. Also, with disks of this type, wood products are polished.
  • Wire discs are used by artisans to remove rust. They can also remove other types of stubborn dirt.
  • Diamond discs are used for polishing stone.
  • Disc discs are made of plastic or rubber and are used to polish metal surfaces.

Please note: in the process of working with most discs, a special paste or grease is used, which contains abrasives of the finest grinding. They are mainly used for sanding surfaces such as, for example, car body parts.

Which side is suitable for installation

In order to determine which side to install the disc, several main factors must be taken into account.

In particular:

In order to determine in which direction the grinder should turn, here you need to refer to the safety information. In particular, the concrete must be cut on itself.

In this case, sparks will fly from the side, namely from the manager. In general, it is not safe to cut materials in the direction away from you, since in case of jamming, the grinder with the disc will fly towards the one who controls it. This must be taken into account.

How to put the disc on the grinder correctly?

The disc of the “grinder” (angle grinder) is one of its main working parts. It is the disc that determines the use of the instrument. With it, this machine can be used to cut, grind or polish various materials. Discs, depending on the purpose, differ from each other: from abrasive chips. for metal, steel milling cutters and circular saws. for woodworking, with diamond dusting. for stone and tiles, all kinds of brushes, brushes and emery wheels. for polishing various surfaces.

The disc “grinder” is a consumable material; you will not be able to save on it in the process of work. The disc will gradually wear out (burn out) and must be replaced. When planning work, you need to be prepared for this and it is better to stock up on several removable disks in advance.