Product Description:

The PMB31B-10114-01 is a brushless servomotor produced by Pacific Scientific in the PMB Brushless Servomotors series. It is intended for positioning and speed-controlled duties on automated machinery, where the drive must respond quickly and repeatably to command signals from a servo amplifier. By combining permanent-magnet excitation with electronic commutation, the motor supplies consistent torque across its operating speed range and supports feedback-based motion control in packaging lines, material handling stations, and general assembly cells.

The frame follows the NEMA Size 34 footprint, so the 3.4-inch square flange aligns with standard mounting brackets and gearheads. A nominal stall current of 2.7 ARMS at 240 V AC indicates the continuous phase current the drive must furnish without thermal overload. Position data come from a 2048 ppr incremental track on the integrated encoder, providing 8192 post-quadrature counts per revolution for fine motion profiling. The sensing element is a digital encoder with commutation; in addition to incremental channels, it outputs UVW signals that let the drive establish rotor position every 60 electrical degrees. Power and feedback conductors exit the housing as flying leads with AMP connectors, so the motor can be wired without a separate receptacle on the housing. This arrangement supports compact routing where cable space is limited around the motor body.

The motor has a round shaft, allowing clamp or set-screw couplings to be fitted without keyway alignment. For dusty or oil-splash environments, the motor can be supplied with a shaft seal, which helps protect the front bearing area from contamination. The unit is a PMB Series Brushless Servomotor, so its dimensional and electrical characteristics remain aligned with others in the same product family. A stack length multiple of 1 indicates the shortest magnetic stack offered in this frame, which helps reduce inertia for quick acceleration and deceleration. The shorter stack also suits applications that need a compact motor length while maintaining servo response.