People use a variety of ways and fixtureshelping to unscrew such a "stubborn" nut. Someone just tries to heat it, someone resorts to using a powerful gas key, and some are not too lazy to weld steel bars to the nut, for which it will be easier to unscrew it. And not always such tricks help.
The method proposed below allows you to unscrew the nut stuck on the spindle of the grinder, without the use of any special devices and its additional processing. It works, as is customary to say, 100%.
In order to unscrew the nut on the grinder you will need:
1. A piece of sheet metal with a thickness of approximately 0.8 mm.
2. Vise.
3. Pliers.
The work itself is performed in the following order:
1. Remove the disc clamped in the grinder, simply breaking it with your hands.
2. Use a pair of pliers to remove abrasive residue around the nut.
3. Clamp a sheet of iron in a vice.
4. Turn on the grinder and, sawing a metal sheet along its edge, produce part of the abrasive remaining under the nut. If this method of removing it seems uncomfortable or dangerous, then you can cut the abrasive with a regular file.
After this, the nut is loosened easily and usually by hand.
You can remove the remaining non-abrasive central part from the grinder spindle and change it with a new one.
This method of unscrewing the clamping nut grinder stuck on the spindle allows you to unscrew it quickly and, most importantly, is absolutely safe for the tool. He does not require any excessive mechanical influences on the grinder, capable of breaking its gearbox or locking mechanism.
You can see in more detail how to effortlessly unscrew the tightened screw on the grinder in the video below: