The Grainger 16N028 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 1.125" shaft diameter and 1.937" shaft height. The motor operates on 115V power with a service factor of 1.15 and includes thermal overload protection. Some key features are the cast iron construction, ball bearings for smooth operation, and durable powder coat paint finish. With a totally enclosed fan cooled (TEFC) design, it is well suited for industrial applications requiring a rugged, dependable 1/2 HP electric motor.