Product Description:

The PMB33F-20114-02 brushless servomotor is produced by Pacific Scientific as part of the PMB Brushless Servomotors series. In automated conveyor cells, pick-and-place gantries, and indexing tables, it supplies closed-loop torque and velocity so the attached axis can follow programmed motion profiles without mechanical overshoot. The motor couples directly to a compatible drive and converts electrical energy into mechanical work for high-response industrial positioning tasks. Its compact construction supports straightforward wiring in machines where installation space is limited.

It occupies the NEMA Size 34 frame, so the mounting face aligns with existing NEMA 34 brackets in machinery. When powered from a 240 VAC bus, the stator can sustain a nominal stall current of 11.0 ARMS, which supports continuous torque during holding or low-speed moves. Rotor position feedback comes from an optical encoder that yields 2048 ppr, and with quadrature the drive sees four times that count for finer interpolation. Because the sensor is a digital encoder with commutation, it provides electrical phase data without separate Hall boards. Power and feedback connections use flying leads with AMP connectors, which helps simplify cable routing on compact axes.

The output shaft features a square key, allowing couplings or sprockets to transmit peak torque without relying on friction alone. Thermal monitoring is handled by the embedded PTC thermistor; when its resistance rises beyond the drive threshold, the control circuit can initiate a controlled shutdown to protect insulation. The magnetic core uses a stack length multiple of 3, which increases active iron volume and raises continuous torque density while keeping the outer frame unchanged. The unit is a PMB series brushless servomotor that uses permanent-magnet construction and sinusoidal drive currents for smooth operation across its speed range. This combination supports repeatable starts, stops, and reversals in demanding motion applications.