Product Description:

The PMB33E-20216-01 servomotor is produced by Pacific Scientific within the PMB Brushless Servomotors series. It is a permanent-magnet brushless unit intended for closed-loop motion axes in industrial automation cells, where precise torque delivery and rapid acceleration are required for pick-and-place gantries, indexing tables, and light machine tooling. As part of a matched motor-drive package, it converts electrical power from a servo amplifier into controlled rotary motion while feeding position data back to the controller. This arrangement supports accurate starts, stops, and reversals when load conditions change during normal machine cycles.

Mechanically, the motor occupies the NEMA Size 34 frame, so its mounting face aligns with standard 3.4-inch square brackets used on compact conveyors and presses. Rotary position feedback comes from an optical encoder rated at 4096 ppr, letting the drive divide one turn into fine position increments for motion control. At 240 VAC stall, the windings carry 7.4 ARMS, a current level associated with the motor's stall operating point. Power and feedback exit through flying leads with MS connectors, which simplifies routing to the servo amplifier and feedback interface. The feedback device is a digital encoder with commutation, so the controller also receives the commutation signals needed for phase alignment. Because the feedback electronics are integrated into the motor, the drive can monitor rotor movement without requiring a separate external sensing package. This combination supports stable low-speed control and responsive acceleration in compact axis assemblies.

An optional shaft seal helps block lubricant egress and protect the bearings when the motor is mounted in washdown or dusty areas. Torque is transmitted through a square key machined into the output shaft, giving couplings or pulleys a positive mechanical drive connection. The front-end sealing and keyed output also suit applications that use belt drives, small gearboxes, or rigid couplings. The electromagnetic package uses lamination height 3, indicating a longer active stack that supports higher continuous torque. The motor belongs to the PMB Series Brushless Servomotor family and is intended for use with compatible servo controls from the same platform.