The Difference is in the Name

Design D Motors

Design D Motors have high starting torque and higher than normal slip characteristics. Slip is the difference between the synchronous speed of the motor and the actual running speed. Design D motors are rated 5-8% Slip or 8-13% Slip. Design D motors are commonly used in punch press and oil pump jack applications. Design D motors have been produced by Delco Electric, General Electric, Louis-Allis Electric, Reuland Electric, Toshiba Electric, Teco/Westinghouse Electric, and Westinghouse Electric.