Product Description:

The PMB31D-10200-01 is a brushless servomotor produced by Pacific Scientific and belongs to the PMB Brushless Servomotors series. As a rotary actuator used in industrial automation, it converts controlled electrical input from a servo drive into precise angular motion for indexing tables, packaging axes, and similar closed-loop positioning tasks. It is intended for motion systems that require repeatable speed control and accurate shaft positioning during continuous machine cycles. In this type of application, the motor works with the drive and feedback device to maintain commanded motion under changing load conditions.

The frame envelope is set by the NEMA Size 34 designation, so the mounting face, bolt circle, and pilot diameters match common size-34 layouts used in industrial equipment. Electrical loading limits are shaped by a nominal stall current of 5.4 ARMS at 240 VAC, indicating how much continuous phase current the drive must supply when the rotor is locked at rated torque. Position feedback is supplied by a resolver, an analog sensor that returns absolute angular information and withstands high vibration better than optical encoders. Power and feedback exit the housing through flying leads with MS connectors, which permit direct cable connection without opening the motor endbell. Mechanical energy is transmitted through a round output shaft, allowing flexible coupling choices where keyed or splined interfaces are unnecessary.

To support washdown or dusty environments, the motor is fitted with a shaft seal that limits ingress at the output journal and helps protect the bearing area. The electromagnetic section uses a stack length multiple of 1, which means the lamination stack is the shortest offered in this frame and gives the motor lower inertia for faster acceleration. Lower inertia helps the axis respond more quickly to changes in commanded speed and direction. Because the sealing point is located at the shaft exit, the motor is better suited for installations where splash or airborne debris can reach the coupling area.