Product Description:

The PMB31D-00114-00 is a brushless servomotor engineered by Pacific Scientific in the PMB Brushless Servomotors series. It converts commanded current into controlled torque and speed for pick-and-place stations, indexing conveyors, and coordinated gantry axes. A permanent-magnet rotor and low electrical inertia help the motor respond quickly to changing command signals. Digital feedback supports stable commutation and repeatable positioning during short-cycle motion. The unit is intended for automated equipment that needs consistent servo response without adding unnecessary drivetrain compliance. That makes it suitable for machines that need frequent starts, stops, and direction changes while maintaining controlled speed transitions.

The power interface uses flying leads with AMP connectors, which simplify connection to compatible servo drives and allow straightforward cable routing in compact machine spaces. The motor uses a NEMA size 34 frame, so the housing matches common mounting patterns found on medium-torque linear stages and rotary tables. Rotor position is supplied by an incremental encoder with 2048 ppr, giving the drive fine motion data for smooth low-speed operation and accurate commutation. This feedback device is a digital encoder with commutation, so one assembly provides incremental counts and commutation signals instead of requiring separate sensing hardware. On a 240 VAC supply, the winding can sustain a nominal stall current of 5.4 ARMS within locked-rotor thermal limits.

The shaft includes a flat, which allows couplings to be secured without a keyway and helps keep the drive end simple in compact transmissions. It is supplied as a standard motor, so its electrical and mechanical dimensions follow the regular form factor used for this product line. The motor uses a stack length multiple of 1, which helps reduce rotating mass and supports quick acceleration. That stack arrangement suits motion axes that start and stop frequently, including small conveyors and positioning slides. The mechanical layout also helps when the motor is paired with pulleys or compact gearheads that need a straightforward shaft interface. The overall configuration favors compact servo applications where encoder feedback, moderate frame size, and predictable integration are more important than oversized mechanical hardware.