The Grainger Approved 1/2 HP Motor is a single-phase, 115/230V AC, 1725 RPM, 56C frame, open drip proof motor. It has a 1/2 HP rating with a 1.15 service factor. The motor dimensions are 6-1/2" diameter x 8-3/8" long. It has a 5/8"-18 threaded shaft that extends 1-3/8" from the endbell. The motor is thermally protected and rated for continuous duty applications.