Product Description:

The PMB33E-20214-02 is a brushless servo motor manufactured by Pacific Scientific and supplied in the PMB Brushless Servomotors series. This rotary actuator is intended for closed-loop industrial automation where precise torque and velocity control are required to position tooling, conveyors, or index tables. Its brushless design supports responsive motion control and avoids the wear associated with mechanical brush contact. That operating style makes the motor suitable for repeated start, stop, and speed-change cycles in packaging, indexing, and material-handling equipment where axes must respond quickly to changing commands.

The motor uses a NEMA Size 34 frame, so its mounting face and pilot diameter align with standardized U.S. flange dimensions. Power and feedback conductors exit through flying leads with MS connectors, which provide a compact connection method for both motor power and signal wiring. The circular connector format helps keep the cable interface secure in moving machinery. An embedded PTC Thermistor monitors winding temperature, and continuous current under stalled conditions is limited to 7.4 ARMS at 240 VAC. Rotor position feedback is generated by an encoder with a resolution of 2048 ppr, giving the drive incremental position data and commutation information from the same feedback device.

The feedback system uses a digital encoder with commutation tracks, so separate Hall sensors are not required for motor commutation. Output torque is transmitted through a shaft with a square key, which supports positive coupling to pulleys, gears, and similar mechanical elements. The motor uses a stack length multiple of 3, which increases magnetic length without changing the frame diameter. This longer active section supports higher magnetic interaction across the rotor and stator while keeping the external mounting envelope compact. The stator laminations are arranged to preserve a practical thermal path through the housing during continuous servo duty.