SCR rated DC motor has a low profile and unique brush holder design for easy access. Long brush life. Permanently lubricated sealed ball bearings. Die cast aluminum endshields with cast iron bearing inserts. U.S.A.HP 1/4 Rated RPM 1,750 Volts 90 Shank Diameter (in.) 5/8 Frame Type NEMA C Face Mounting - SS56C.