Not sure what you mean? How would it work if it was mounted higher up? or do you mean using the kress as a motor to drive a separate spindle?

If so It was probably Steve Hiltons DC spindle. (except it used a DC motor...) not sure you wil reduce the vibration either unles you also meant it be belt drive? If so then the belt will still transmit vibration and the best solution would be to gear down the Kress with a belt reduction to stil drive the spindle at high speed. The reduced power shouldnt be a problem as at these speeds i guess you are talking about small engraving cutters?

sorry If I've got the wrong end of the stick....