The 3/4 HP 3600 RPM motor with 3/4in. shaft is single phased, 60hz and requires 4.8 amps at 115 vac or 2.4 amps at 230 vac. Use our 10in. buffing wheels with 3/4in. asbor hole. Overall shaft length is about 28in. distance from housing to the end of the shaft is about 6 1/2in..