Product Description:

Pacific Scientific manufactures the PMB31B-10100-01, an entry in the PMB Brushless Servomotors series. This three-phase brushless servomotor converts electrical energy into regulated mechanical torque and speed inside industrial automation cells. When paired with a compatible servo drive, the motor enables precise bidirectional motion for packaging, assembly, and material-handling equipment through closed-loop control. The brushless design avoids commutator wear and supports smooth response during repeated reversing moves. Its compact construction targets mid-range continuous-duty applications where space is limited and repeatable positioning is required.

The frame corresponds to NEMA Size 34, so the mounting face follows a 3.4-inch square bolt pattern that mates with standardized brackets and gearheads. Output torque is delivered through a round shaft, allowing clamp or shrink-fit couplings without keyway stress risers. Power and feedback exit the housing on flying leads with AMP connectors, which allows straightforward routing to the drive. Rotor angle is detected by an embedded resolver, and its sinusoidal signals let the controller commutate the motor and track position during operation. Under a 240 VAC bus, the motor draws up to 2.7 ARMS while holding stall torque. This current value is useful for sizing fuses, contactors, and thermal sensors.

A factory-installed shaft seal is available to block contaminant ingress at the housing interface and extend bearing life in dusty or fluid-laden environments. The magnetic core uses a stack length multiple of 1, which helps keep rotor inertia low for fast start-stop cycles. This arrangement suits axes that need quick acceleration and short settling times. The motor is a PMB Series Brushless Servomotor and follows common insulation and thermal practices used across the product line. Documentation is available for mechanical modeling and motion tuning in systems that use this motor.