RPM is close, (3450) but with only 1/2 hp not sure that's going to be an adequate motor for any lengthy stays at the buffer. Looks like it would be ok for a low to moderate use buffer, but personally I'd go with something a bit more substantial with a bit more power. If you do some studying on the process of buffing stainless, aluminum, or whatever else I think you'll discover that bigger is going to be better---but if price is your only concern, then Sears will probably do.....