Product Description:

The PMB31D-00114-01 is a brushless servomotor produced by Pacific Scientific and supplied within the PMB Brushless Servomotors series. As a permanent-magnet motor for industrial automation, it converts drive current into precise rotary motion so that indexing tables, pick-and-place axes, or light machining spindles can follow tightly controlled speed and position commands issued by a matched servo drive. It is suited for motion tasks that require repeatable speed regulation and accurate positioning during continuous operation.

This model is built on a NEMA Size 34 frame, giving it a standardized 3.4-inch square mounting face and bolt pattern. Feedback is supplied by a digital rotary encoder that delivers 2048 ppr, allowing the controller to track shaft position with consistent closed-loop accuracy. At a line voltage of 240 VAC, the motor can sustain a continuous stall current of 5.4 ARMS, which sets the continuous-duty demand placed on the matching drive. Power and feedback leads exit the housing as flying leads with AMP connectors, a layout that helps when the motor is installed on moving carriages where rigid connectors could be stressed. Commutation data and incremental position signals are combined in a single feedback device described as a digital encoder with commutation, so only one cable bundle is required between the motor and drive.

The mechanical interface uses a flat shaft, allowing set-screw couplings to lock against a planar surface and reduce the chance of slippage during rapid acceleration. For washdown or dusty environments, the motor can be ordered with a shaft seal, which helps keep contaminants away from the front bearing. Magnetic stack height uses a stack length multiple of 1, which keeps inertia low for fast start-and-stop cycles while still supporting rated torque. This arrangement supports compact servo axes that need quick response and stable coupling performance.