The New Marathon C1157 Electric Motor is a 1HP induction motor with a keyed shaft diameter of 5/8 inches. It has a 60 Hz AC frequency rating and can be reversible. The motor is designed for foot-mounted or base-mounted applications and has an insulation class of B (Max 266°F). With a service factor of 1.25, this Marathon Electric motor is suitable for general purpose use in industrial automation and motion control systems, offering reliable performance at 115 V or 230 V AC input voltages.