Overview Product Description 1 hp 1800 RPM, 1.3 amps 575 Volts 60hz. Three Phase NEMA 56 frame, Keyed Shaft 5/8" Diameter x 1 7/8" Service Factor: 1.25, Thermal Overload Protection: None Rigid Base, Reversible, Ball Bearings, Class B Insulation Cross Reference: 5K49MN4111 Marathon k424 Product Videos Custom Field Product Reviews