The Grainger 16P910 is a 1/2 HP, 115V, 1725 RPM, 56C frame, open drip proof, single phase, ball bearing electric motor. It has a 1/2" diameter shaft with a 1/4" keyway and counterclockwise rotation facing the shaft. The motor is thermally protected and rated for continuous duty. It measures approximately 9-1/2" long by 5-3/4" wide by 6-7/8" high and weighs 22 pounds. This electric motor is suitable for various industrial applications requiring 1/2 HP.