Baldor motors are good, they are used in heavy industrial applications all the time, but what kind of grinder is this that it needs a motor with that kind of service rating? It's a $600 motor, a nice new bench grinder is only a little over $100, for example this one: https://www.amazon.com/DEWALT-DW758...ower-hand-tools&ie=UTF8&qid=1344129710&sr=1-1