Motorized worm gear mechanical screw jacks are the workhorses of the lifting industry. They are commonly used to lift, hold, and position loads. Screw Jack Motor Flanges include IEC Motor Flanges and NEMA C-Face Motor Adapters. Available in single phase or three phase electric motors, stepper motors and servo motors. Choose the IEC Motor Flanges that is compatible with JACTON screw jack and your direct-drive motor. Direct mount capabilities up to 35-tons, designed to IEC Motor Flange Standards, direct couple motor to left or right-hand input shaft, all hardware provided.