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Ok so I've been using this for a little over a week now and it works well. It's not perfect, I have to start it a full rpm and then turn it down. I can only turn it down to about 60% speed because...

This is the same way a variable bench grinder works. The only thing that's going to get damaged is the dimmer switch over time. I thought the same thing but I ran it by the motor shop I use.

Hey guys i thought i would share with you my way of turning my standard bench grinder into a variable speed Bench grinder. Things your going to need are.: 1 A Decent Dimmer switch, 2 A Outlet to pug...