I wanted to run this by you guys and see if anyone has run into this before.   We have a grinder at work. I believe it is [this](https://www.milwaukeetool.com/power-tools/corded/6146-30) Milwaukee. Every time you use it the nut loosens up. It happens with grinding wheels and cutting wheels and flap wheels. Doesn't matter what brand wheel. The nut is being used in the proper orientation. You can use the spanner wrench and crank the shit out of it. It doesn't matter how tight you get it,