Product Description:

The PMB31D-10116-03 brushless servomotor is manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. It serves as an electromechanical actuator for automated equipment that requires tightly regulated velocity and position. Controllers can command incremental moves, coordinated motion, or steady torque without mechanical contact wear, which helps the motor support repetitive duty in indexing tables, feed axes, and other motion systems that require smooth starts and accurate stops.

The motor occupies the standard NEMA Size 34 frame, so it mounts on widely available 3.4-inch square flanges and fits machine layouts built around common mounting hardware. Position feedback is supplied by a high-resolution encoder that delivers 4096 ppr, enabling fine incremental positioning and stable speed regulation in multi-axis assemblies. Continuous load can be held because the windings tolerate a nominal stall current of 5.4 ARMS when powered from a 240 VAC drive. Power and feedback conductors exit the housing as flying leads with AMP connectors, and this flexible pigtail arrangement simplifies routing through machine cable trays without forcing a fixed connector orientation. Rotor commutation signals and incremental counts are both generated by a digital encoder with commutation, so the drive can obtain phase information and motion feedback from the same package.

A factory-installed shaft seal and PTC thermistor protect internal bearings from contaminants and allow the drive to monitor temperature during operation. Motion is transferred through a round shaft that mates easily with clamp or set screw couplings used on conveyors, pumps, and general automation axes. The magnetic circuit uses a stack length multiple of 1, which keeps rotor inertia comparatively low and helps the motor respond quickly to acceleration and deceleration commands.