Product Description:

The PMB33F-00101-02 is a brushless servomotor manufactured by Pacific Scientific for the PMB Brushless Servomotors series. As a permanent-magnet, electronically commutated unit, it delivers closed-loop torque and velocity commands to machinery such as pick-and-place heads, indexing tables, and light conveyors. Its brushless design removes commutator wear and supports repeatable response during frequent start-stop cycles. Within an automation cell, the motor operates as the electromechanical actuator that turns drive current from a servo amplifier into accurately regulated shaft rotation for position or speed control tasks.

This model is built on a NEMA Size 34 frame, so its mounting face and pilot dimensions align with standard 3.4-inch square motor brackets often found in compact OEM equipment. Stator copper loading is engineered for a nominal stall current of 11.0 ARMS at 240 Vac maximum; this is the continuous current the drive must supply when the rotor is held motionless under rated load. Power and feedback exit the housing as flying leads with AMP connectors, simplifying integration where quick-disconnect plugs are required. Rotor position feedback to the drive electronics is furnished by a three-phase Hall sensor set, enabling six-step commutation and startup alignment without an external encoder. The motor retains thermal protection from an internal Pacific Scientific PTC device that rises sharply in resistance near the allowable winding temperature.

For applications that demand additional overload safeguarding, the windings embed a PTC thermistor; its steep resistance change can trigger the drive to limit current before insulation limits are exceeded. Mechanical power is delivered through a flat shaft, allowing rigid set-screw coupling without keys and keeping rotor inertia low for rapid acceleration. This shaft style is commonly used where compact couplings and simple mechanical retention are preferred. The electromagnetic section uses a stack length multiple of 3, giving higher continuous torque than shorter variants while retaining the same mounting footprint.