Product Description:

The PMB31B-10201-00 is a brushless servomotor built by Pacific Scientific and supplied within the PMB Brushless Servomotors series. As a permanent-magnet electronically commutated unit, it converts drive current from a servo amplifier into continuous rotary torque for positioning and velocity control on automated machinery and material-handling cells. The motor is intended for closed-loop motion axes that require repeatable speed regulation, responsive acceleration, and stable operation during frequent start-stop cycles. Its brushless design also supports smooth torque delivery in repetitive industrial duty.

Its frame follows the NEMA Size 34 standard, giving a 3.4-inch square mounting face that simplifies interchange with existing stepper or DC motors. At 240 VAC, the nominal stall current reaches 2.7 ARMS, which states the continuous current the matching drive must supply without exceeding thermal limits. Power and feedback conductors exit as flying leads with MS connectors, which reduces cabinet depth because no fixed receptacle protrudes from the endbell. Rotor position information comes from a Hall sensor, enabling six-step commutation when paired with compatible drives. The stainless-steel output uses a round shaft profile, so couplings with set screws or compression hubs can be attached without a keyed interface.

With stack length 1, the motor uses the family’s shortest stator while keeping overall mass low for gantry or belt-driven axes. It is supplied as a standard motor, so it is offered in a regular production configuration rather than as a special build. The shorter stator can help in applications where axis space and moving mass must be limited. This arrangement keeps the motor compact while maintaining the mounting and electrical characteristics needed for general servo service.