Product Description:

The PMB33F-20101-03 is a brushless servomotor produced by Pacific Scientific for the PMB Brushless Servomotors series. The unit converts controlled electrical energy into rotary motion for positioning tables, pick-and-place heads, and other motion axes in automated machinery. When paired with a compatible electronic drive, it maintains commanded speed and torque so that industrial processes can repeat cycles with tight accuracy.

This model is built on a NEMA Size 34 frame, so its mounting face and pilot diameter align with standard size 34 gearboxes and slide brackets. The windings can sustain a nominal stall current of 11.0 ARMS, indicating the continuous phase current the drive must supply while the shaft is locked. Power and feedback conductors exit the housing as flying leads with AMP connectors, simplifying direct harness assembly without separate terminal blocks. Rotor position for electronic commutation is derived from an embedded Hall sensor, which supplies three digital signals spaced 120 electrical degrees to the controller. Mechanical torque is delivered through a shaft machined with a square key, allowing rigid coupling to sprockets, pulleys, or hubs without slippage.

The electromagnetic core uses a stack length multiple of 3, which gives the motor a longer axial iron path than shorter versions in the same platform. To guard against coolant splash and rapid thermal excursions, the motor is factory configured with a shaft seal and PTC thermistor; the seal limits ingress at the output end, while the thermistor signals excessive winding temperature to the drive. The motor follows family-wide cable color codes and phasing, which keeps wiring conventions consistent across related units. The winding rating is tied to a bus of 240 VAC, so the drive must present this voltage when full stall torque is required.