Product Description:

The PMB31D-00101-01 is a brushless servomotor produced by Pacific Scientific as part of the PMB Brushless Servomotors series. This permanent-magnet unit converts electrical power into tightly regulated rotary motion for packaging lines, electronic assembly handlers, and other automated machinery that require accurate speed and position control. When paired with a compatible drive, the motor delivers bidirectional torque and rapid reversals without maintenance linked to brushes, making it suited for continuous-duty production environments. Its operating profile fits applications that need repeated starts, stops, and directional changes while maintaining stable servo response.

The frame follows the NEMA Size 34 standard, so mounting holes and shaft height align with common motion brackets and existing machine hardware. The nominal stall current is 5.4 ARMS at 240 Vac, so the selected drive must support that load during sustained holding conditions. Power and feedback exit the housing through Flying leads with AMP connectors, which allow direct harness termination and help reduce required panel depth. Rotor position is commutated through Hall sensor feedback, which provides 60-electrical-degree signals for trapezoidal control. This feedback arrangement supports reliable electronic commutation during startup and low-speed operation.

A factory-installed shaft seal sits behind the front bearing to limit lubricant escape and help block airborne contaminants when the motor is mounted to gearboxes or exposed to coolant spray. The output end uses a flat shaft, so set screws can clamp on the ground flat instead of relying on keyways. The magnetic stack uses a stack length multiple of 1, which keeps the body compact and helps reduce moving mass on high-speed axes. A shorter magnetic stack can also help the motor fit into tighter machine spaces where axial clearance is limited.