Product Description:

The PMB33F-00200-03 is a brushless servomotor manufactured by Pacific Scientific within the PMB Brushless Servomotors series. It works as a compact rotary actuator that couples directly to machinery and accepts controlled current from a servo drive to generate precise torque and speed. The motor is intended for indexing, contouring, and coordinated multi-axis duties where repeatable motion and stable feedback are needed in general industrial automation. Its brushless design supports accurate speed regulation across varying load conditions, and the integrated feedback arrangement helps the drive maintain commanded position during dynamic moves.

The housing uses a NEMA Size 34 frame, which gives the motor a 3.4-inch square mounting face that matches many gearheads, brackets, and linear slide assemblies. On a 240 Vac bus, the servo drive can apply a nominal stall current of 11.0 ARMS, which reflects the phase current the windings can carry at standstill without exceeding rated temperature. Electrical terminations are provided as flying leads with MS connectors, so the motor can be connected without a separate terminal box while still keeping the interface compact. Rotor position is measured by an internal resolver, which sends analog feedback signals to the drive for commutation and closed-loop control. The output shaft includes a flat surface that helps clamp-style couplings hold securely during starts, stops, and repeated reversals.

A factory-installed shaft seal helps block lubricants and airborne particles from entering the front bearing area, which supports use in enclosed machine spaces. Winding temperature is monitored by a PTC thermistor that changes resistance sharply near its response point, allowing the control system to reduce current or stop the axis if the motor overheats. The motor also uses a stack length multiple of 3, which corresponds to the longest lamination length offered for this frame and increases continuous torque capability without increasing the face size of the motor.