I have a large bench grinder/polisher. 3/4" arbor, 3/4hp. Weighs a good 60 lbs. or so. Grinding wheel on one end and rag wheel on the other. Today, I swapped out the buffing wheel for a wire wheel, fired the sucker up and it started shaking like Katherine Hepburn's head in a helicopter. I tried another wire wheel and same thing. Grinder runs @ 3600rpm. Wire wheels are rated for 4500rpm.
The machine is bolted down firmly to a workbench, however the workbench may not be sturdy enough for the machine.
Has anyone else experienced this when using wire wheels? Will bolting the grinder to a proper stand (bolted to the floor) help? Why the heck would a wire wheel vibrate so badly?
