How to attach a disc to an angle grinder

What to do if the disc is jammed (bitten) on the angle grinder?

Anyone who has experience of intensive work with an angle grinder has probably at least once encountered such a situation.

Usually, this happens if the disc is pinched between parts, it stops or breaks, and the motor of the angle grinder continues to rotate and thus irrevocably tightens the nut.

So what can you do if you bite a disc on an angle grinder?

Each master has his own secrets. Especially for you, we learned a few of them and now we will share the most common ways to get out of the situation.

ANGLE GRINDER how to replace the disc ? and install a new disc ( THE CORRECT WAY.!!!! )

How to change a disk if it is jammed?

What to do if the wheel on the “angle grinder” is stuck? This can happen, for example, when, as a result of work, pieces of the workpiece being cut sharply clamp the rotating disc. This often leads to its destruction.

To unscrew the nut tightened as a result of rotation, if the circle is bitten, it can be very difficult.

  • One of these methods would be to use two gas keys at once. In this case, the remains of the disc must be broken with pliers. With one key, you need to clamp the part of the stem located under the disc, and with the other, unscrew the flange.
  • Sometimes, to gain access to the gas wrench to the rod “angle grinder“, you have to disassemble the gearbox.

disc, angle, grinder

  • A simple device saves from the problem of a jammed nut. cardboard or tin washers. They are often sold with an “angle grinder”. But over time, they can be lost or become completely unusable. Making homemade washers is not at all difficult. However, it is better not to neglect them.

In extreme cases, the flange can be sawn with a hacksaw for metal and then replaced with a new one.

How to Place a Disc on an Angle Grinder Correctly?

The disc “angle 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 “angle grinder” is a consumable material, you cannot 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.

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

When choosing accessories for an angle grinder, 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.

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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.

How to Place a Disc on an Angle Grinder Correctly?

In order to correctly place the disc on the angle grinder, it should first be noted that the disc is mounted on the spindle of the angle grinder using a special clamping flange with M14 thread. Let’s take a closer look at how to remove a disc from an angle grinder. In order to unscrew the disc from the angle grinder, you first need to dismantle the flange. Especially for such purposes, manufacturers complete the angle grinder with a special open-end wrench. It has a specific shape. The pins located on the horns of this key are inserted into specially provided holes on the flange.

To unscrew the flange, we fix the spindle. To do this, we clamp the latch, which is usually a button on the top of the case. When pressed, the cotter pin is placed in the hole in the driven disc of the gearbox, and this in turn prevents it from rotating. Next, we insert the pins of the key into the specially provided holes on the flange, pressing the lock, you must simultaneously turn it counterclockwise and move the flange from its place. If the manipulations were successful and the flange succumbed, you can unscrew it by hand and put it aside.

Now let’s dismantle the disk. Often, in the process of intensive work with the tool, a kind of plaque from small particles of metal and abrasive material forms on the inside of the protective casing. For optimal, stable and durable operation of the angle grinder, remove the bottom of the flange and clean the casing with a steel brush.

How to Place the Cut-off Wheel on an Angle Grinder Correctly

I think the author is most likely interested in the question, “which side to put the disc on the angle grinder (angle grinder)?” which interests many.

As for the algorithm for replacing the disk, questions rarely arise, here everything is called in plain sight. a special key or a gas key and off you go. It is also difficult to miss the size of the disc, here the size of the casing is just the criterion. An important parameter is the number of revolutions indicated on the disc, here you need to choose an angle grinder strictly in accordance with the manual, the disc of which revolutions can be used on it (the revolutions indicated on the disc must be either equal to or greater than the spindle revolutions, but in no case not less!)

I will not speak about bowl-shaped discs. you cannot put them in another way. Diamond discs and discs for cutting stone from carbide, have an indicator of the direction of rotation, or a pronounced profile of the tooth, in addition, they have a metal base. and it is metal on both sides.

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But in which direction to put the label of the cutting disc during installation, not everyone knows. outward or to the gearbox with a piece of paper.

Some are simply convinced that there is no difference. But this is not the case. The disc is always placed with the label facing out. Yes, someone will say that the direction of rotation of the disc is not regulated by a strictly drawn arrow, almost always this arrow is not present, at least on abrasive discs (cutting) and will also be right.

Here the point is different, the arrow is not needed, at least according to several of the following logical conclusions.

A wide metal washer is installed on the side of the label. This is exactly what should be facing the movable flange nut, that is, outward (even if the disc is without a label). If the disc is jammed and broken, it will be easier to unscrew the movable nut if it slides over the metal washer. If you put the disc on the contrary (with the washer to the gearbox), then the movable outer nut will be very difficult to unscrew along the abrasive part.

In connection with this seemingly obvious thing, the structure of some cutting discs is performed. They are less susceptible to breakage (and wear), if installed correctly. with the label outward (respectively, and with a wide washer to the clamped nut and not towards the gearbox)

Install angle grinder disc | Angle grinder safety

P.S. Well, and certainly, in addition to all of the above, for work you need to arm yourself with a suit made of dense fabric (I have a canvas apron for this purpose) and goggles!

How to remove it?

Discs, especially those designed for cutting, burn out quickly and must be replaced.

It will be useful to remind once again about the need to disconnect the “angle grinder” from the network. Work to be done with fast rotating parts and better protect yourself.

If you need to replace a worn disk, you need to perform a number of simple operations.

  • The disc is secured to the stem stem with a threaded nut. In the kit of any angle grinder there is a special key, on the arms of which pins are fixed, which cling to the holes of the flange.
  • The spindle is fixed with a special button, the cotter pin of which, when pressed, enters the hole of the gearbox, thus fixing it. Having pressed the button with your right hand, at the same time with your left hand you need to unscrew the fastening nut with a wrench. If the nut has moved from its place, unscrew it by hand. That’s it, now the disc can be removed.

How to change the disc on an angle grinder?

  • The nut has holes for fixing it with pins on the horns of the key, you can unscrew it by tapping with a hammer on a chisel or a bar that is pressed into the hole.
  • It is sometimes possible to push the nut off by simply tapping its edge with a hammer in the direction of twisting. However, in this case, damage to the flange may occur, especially the holes for the pins of the key; in the future, it may be impossible to apply the key to such a nut.
  • A very good result is obtained when using a nail to make a key. It is better to choose a large nail, from 100 mm. Using a hammer and pliers, the nail is U-shaped. A hacksaw or chisel is used to cut off the tip and head of the nail. With such an improvised key, you can try to knock off the nut. You can bend the ends of such a key, then it will turn into a kind of open-end key, but this will require a lot of labor. You can also insert a gate, for example, a hammer or other nail, into the arc formed by a bent nail.
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If you had to use a gas wrench, you must remember about the very powerful shoulder of such a wrench and about the force that is applied to the “angle grinder” parts. 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 an “angle grinder” involves a lot 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 “angle grinder”, to ensure the correct cut or the choice of the correct mode of operation. 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.

The disc on the “angle 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 “angle grinder” with a circle “towards 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 even a small angle grinder can be a serious hazard.

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.

“Angle grinder” is a rough 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.

How to put the disc on the “angle grinder” can be seen in the following video.