Product Description:

The PMB31B-00114-00 brushless servomotor is manufactured by Pacific Scientific as a member of the PMB Brushless Servomotors series. It supplies controlled torque and speed to machine axes, indexers, and assembly stations that require repeatable positioning under closed-loop control. By combining electronic commutation with high-resolution feedback, the unit enables drive amplifiers to regulate shaft position within tight tolerances common in automated packaging, semiconductor handling, and general motion platforms. This arrangement also supports accurate starts, stops, and repeated motion cycles in automated equipment.

Its frame conforms to the NEMA Size 34 envelope, allowing direct installation in mounts that follow this standard. Position feedback is delivered by a 2048 ppr incremental encoder, and the integrated Digital Encoder with commutation supplies both incremental counts and commutation signals to the drive. When powered from a 240 VAC bus, the motor can sustain a nominal stall current of 2.7 ARMS, which supports continuous torque production until thermal limits are approached. Power and feedback conductors exit the housing as flying leads with AMP connectors, eliminating the need for panel-mounted receptacles and helping routing in compact control cabinets. The leaded connection style also reduces the amount of fixed connector hardware at the motor housing.

Because it is a Standard Motor, no special windings or mechanical changes alter its standard ratings. The output end carries a flat shaft, giving a simple surface for clamp collars or bonded pulleys without the backlash that keyways can introduce. Rotor iron uses a stack length multiple of 1, which keeps the motor in the base configuration for this frame. The motor remains suitable for encoder-based servo systems that depend on stable commutation and repeatable mechanical response. Its overall form supports compact axis layouts where predictable mounting and feedback integration are important.