Product Description:

The PMB31D-10100-01 is a brushless servo motor in the PMB Brushless Servomotors series manufactured by Pacific Scientific. Within an automation cell, it acts as the rotary actuator that positions tooling, grippers, or tables according to commands from a digital drive. Electronic commutation and resolver feedback let the axis accelerate, decelerate, and hold position with minimal torque ripple, making the motor suitable for electronic assembly lines, packaging machinery, and material handling fixtures.

Mechanically, the motor is built on the NEMA Size 34 frame, so its 3.39-inch square face aligns with standard size-34 mounts found on mid-power stages. The drive must be able to deliver 5.4 ARMS of continuous phase current at 240 V AC; this figure represents the stall condition where the rotor is locked while thermal limits are still respected. Power and feedback exit through flying leads with AMP connectors, a configuration that simplifies installation in tight enclosures because no mating receptacle protrudes from the end bell. A round shaft allows clamp-type couplings to be used without keyways, which is useful on loads that require repeated coupling changes. For position sensing, the unit employs a resolver, whose analog sine-cosine signals remain reliable in high vibration and elevated temperature zones.

To guard the bearing cavity against airborne coolant or dust, this build incorporates a shaft seal, an available customization for applications that demand extended service intervals. The laminated core is produced with a stack length multiple of 1, giving the shortest magnetic path in the family and therefore the lowest inertia for rapid indexing moves. The PMB Brushless Servomotors line from Pacific Scientific uses a common mechanical format across related models, helping maintain consistent fit within the product family.