Product Description:

The PMB31D-00116-03 is a brushless servomotor produced by Pacific Scientific. As a permanent-magnet, electronically commutated unit, it handles closed-loop positioning and velocity control in automated machinery that requires repeatable motion in a compact package. The motor converts commanded current from a servo amplifier into controlled torque and speed for indexing tables, pick-and-place axes, and packaging equipment. Because commutation is electronic, the motor can respond smoothly to changing command signals during acceleration, deceleration, and hold conditions.

This motor uses a NEMA Size 34 frame, which supports mounting to standard automation gearboxes and linear stages. On a 240 VAC bus, the winding draws up to 5.4 ARMS under steady stall conditions, so the matching drive must support that continuous current. Power and feedback leave the housing through flying leads with AMP connectors, which allow direct connection to field wiring without a separate terminal box. Position feedback comes from an integral encoder with 4096 ppr resolution, giving the control system fine position data for correction during motion. The feedback device is a digital encoder with commutation, so no separate Hall sensors are required and the drive receives both position and commutation signals from one source.

The motor can be ordered with a shaft seal and PTC thermistor, which add sealing support and thermal monitoring for demanding duty cycles. Its output shaft has a flat profile, allowing clamp-style couplings to transmit torque without a keyed interface. The motor uses a stack length multiple of 1, which helps keep inertia low for high-speed indexing and quick direction changes. It is part of the PMB Brushless Servomotors line, and its electrical and mechanical features match this specific motor configuration.