Product Description:

The PMB31B-00214-00 is a brushless servomotor manufactured by Pacific Scientific and delivered within the PMB Brushless Servomotors series. This permanent-magnet unit accepts controlled three-phase drive power and converts it into precise rotary motion for gantries, small conveyors, and pick-and-place axes that demand repeatable positioning. Its compact build enables direct coupling to loads, eliminating belt or gear reductions in many light-duty automation stations. The motor forms part of closed-loop systems where a feedback device reports shaft position to the controller, allowing coordinated multi-axis moves and rapid dynamic response.

The wiring leaves the housing as flying leads with MS connectors, allowing quick interchange without opening an enclosure. A mounting face sized to NEMA Size 34 aligns with standard brackets and gearheads, simplifying mechanical layout. Under worst-case stall at 240 VAC, the phase current reaches 2.7 ARMS, a figure the drive must support continuously without tripping. Rotor position is reported through a 2048 ppr incremental channel generated by a digital encoder with commutation, so the controller receives both fine incremental counts and the electrical phase needed for torque production. This feedback arrangement supports position and velocity control while keeping the motor connections straightforward.

The shaft has a flat machined surface, letting a hub clamp directly and helping prevent slip under start-stop duty. Because the model is supplied as a standard motor, no custom windings or mechanical options alter its published electrical constants. Torque density is shaped by a stack length multiple of 1, the shortest magnetic stack in the family, which keeps inertia low so acceleration is favored over continuous torque. The short magnetic stack also helps keep the motor compact for installations where axial space is limited.