This Leeson 1/2 HP electric single phase general purpose motor has a rigid base and capacitor start. U.S.A. HP: 1 1/2, Rated RPM: 3,450, Volts: 115/208-230, Amps: 3.4 at 230V, Motor Phase(s): Single, Shank Diameter (in.): 5/8, Shank Length (in.): 1 7/8, Frame Type: NEMA S56, Reversible: Yes, Capacitor Start: Yes, Rigid Base: Yes