The Grainger 16P491 is a 1/2 HP, 115V, 1725 RPM, 56C Frame, Open Drip Proof, Single Phase, Ball Bearing, Electric Motor. It has a NEMA standard 56C frame with a 1.15 service factor. The motor is totally enclosed, fan cooled (TEFC) with a cast iron body, aluminum end brackets, and double sealed ball bearings. It can be used for general purpose applications and is ideal for pumps, fans, conveyors, and other industrial machinery. This electric motor would be a good choice when a rugged, dependable 1/2 HP motor is needed.