Product Description:

The PMB33C-20116-00 is a brushless servomotor from Pacific Scientific in the PMB Brushless Servomotors series. As a rotary actuator, it is intended for closed-loop motion axes in industrial automation where rapid acceleration and precise positioning are required. The motor converts command current from a matched servo drive into torque on its keyed shaft, while an integrated encoder feeds back rotor angle so the controller can regulate velocity and position. This arrangement supports stable motion on indexing tables, conveyors, and other axes that must start, stop, and reverse with repeatable accuracy.

Its mechanical envelope follows the NEMA Size 34 frame standard, allowing direct installation in size-matched gearboxes or mounts. At a rated DC bus of 240 VAC, the motor can sustain a nominal stall current of 3.8 ARMS for continuous torque without thermal derating. Position feedback is supplied by a high-resolution encoder delivering 4096 ppr, providing 12-bit incremental counts per revolution for smooth low-speed interpolation and consistent speed correction. Power and signal conductors exit as flying leads with AMP connectors, which helps simplify wiring while maintaining positive locking against vibration. Rotor commutation cues are derived from the embedded digital encoder with commutation, eliminating separate Hall boards and reducing axial length at the rear of the motor.

The output shaft uses a square key, providing a standardized drive interface that resists slip under peak torque. A stack length multiple of 3 adds extra lamination sections, increasing torque density over shorter variants in the same frame and giving the motor more active magnetic length. The motor is supplied as a standard motor with no custom windings or special seals. That configuration suits general industrial duty and keeps the motor within the baseline option set for this model.