Partial or "shell" motors are AC induction, squirrel cage stator and rotor sets. Partial motors range from small fractional horsepower units to several hundred horsepower. The wound stator core is available either as a machined core or with a shell housing to match most any existing diameter requirement. The rotor is available with standard or special machined bores. The user may design partial motors into their equipment and provide whatever means of cooling preferred. High-speed designs are available up to 1500 hertz.

Common applications are motorized spindles, pumps, small hoist motors, drilling and boring machines, routers, arbors, grinders or most any application where the motor must be built-in to another component.