Ok so I want to rid our old iron of its hi/low system and add a different spindle drive becasue I do not trust the oem hi/low system. The questions is can we simply add a different spindle drive and run the motor directly to the spindle with belts?

I know the mtor would have to spin faster but would this really be a problem. Lets say we have a 3500rpm max and we start with a 10hp spindle motor can we add in a 15hp drive and run that motor like I am describing or am I nuts?