Product Description:

The PMB31D-20116-00 is a brushless servomotor produced by Pacific Scientific in the PMB Brushless Servomotors series. Designed for motion axes controlled by digital drives, the unit converts three-phase power into precise torque and speed in packaging equipment, electronics assembly systems, and small material-handling cells. Its feedback system, winding arrangement, and mechanical envelope are suited to tightly coupled servo loops, allowing direct mounting to gearboxes or belt stages without custom adapters. This layout supports repeatable positioning and stable speed control during short-cycle machine motion.

Its frame size is coded as NEMA Size 34, so the mounting face measures 3.4 inches square and aligns with standard 34-frame brackets. The windings can carry up to 5.4 ARMS continuously at 240 VAC, which is the steady current level the motor can maintain without overheating under normal operation. Position feedback is provided by an internal encoder with 4096 ppr of resolution, giving the controller fine incremental position data for accurate moves. The motor uses a digital encoder with commutation, so the feedback device also supplies phase information without separate sensors. Electrical connection is made through flying leads with AMP connectors, which allows flexible routing to pre-wired connection points and simplifies integration into compact control layouts.

The output shaft uses a square key, allowing pulleys or couplings to lock positively during repeated start-stop duty. The magnetic circuit uses a stack length multiple of 1, which keeps the motor compact and helps maintain inertia suited to lighter loads. This unit is supplied as a standard motor, so its windings and hardware follow the regular production configuration rather than a custom build. That arrangement is useful in servo axes where predictable mechanical fit and consistent electrical behavior are needed for routine machine operation.