The disc on the grinder is bitten, how to unscrew the nut

A grinder is an indispensable tool for various types of work. It’s even worse when the tool malfunctions and the disc gets bitten. In this case, it is not possible to remove the nozzle, since the nut is jammed. There is an easy way to twist a closed fastener by heating it, which we will discuss in the article.

How to remove a jammed disc from an angle grinder

Problems most often occur when working with strong materials. When starting, the angle grinder operates at a speed of 6000–12000 rpm. In contact with the surface being treated, the disc receives strong resistance. Its operation slows down somewhat, while the motor continues to turn as before.

This leads to a sharp screwing of the lock nut into the spindle thread. It is no longer possible to unscrew it with the usual key.

How to remove a clamp

There are several simple methods that are used first:

1. Insert a metal rod into the holes and try to turn it with light blows of a hammer. The main thing is not to tear the holes or break the button.
2. Heat the fastener. When the temperature changes, the technical parameters change slightly and expansion occurs.
3. Grind the disc with another grinder until the nut comes loose.

These methods are effective, but not always. Therefore, there are better options for ridding angle grinders of the fastening clamp.

A simple way to tighten a nut

Using a thick piece of board, stump or piece of timber, you can heat the nut. To do this, the angle grinder is pressed tightly against the wood so that the nut continuously rubs against the surface. Turn on the tool and hold it for 2-3 minutes. This time is enough for the mount to become hot.

Next, we clamp it with a regular key and unscrew it easily and freely. This happens due to the physical properties of metals to expand when heated. The method is very good, it works almost flawlessly.

How not to unscrew a nut

When a disk is jammed, the operator spends a lot of time trying to release it. This leads to irritation of the person, resulting in inappropriate methods to correct the problem.

We will tell you what not to do when jammed:

• metal pins in the holes can lead to loosening of the clamp, but more often they lead to a huge load on the gearbox, resulting in damage to one of the structural parts of the angle grinder;
• a nut of a larger diameter welded on top, torn off with a huge wrench, will lead to damage to the gear teeth and stripping of the thread;
• heating with a gas burner is not the best option; this method is unlikely to help, but it will definitely damage the physical properties of the metal.

It is much easier and safer to cut off the clamped disk on both sides with another grinder and unscrew the loose nut without any problems.

How to prevent pinching

Problems with working tools are always better to prevent. To do this, we work extremely carefully, making sure that the disk does not jam or rupture. We also recommend using special nuts. They are more expensive than usual, but they unscrew easily if pinched.

Special gaskets are also considered a hot commodity.Their price is up to 100 rubles, and they provide excellent protection against jamming. You can make it yourself at home, cutting it out of paranita.