Product Description:

The PMB33F-00101-03 is a brushless servomotor produced by Pacific Scientific and supplied within the PMB Brushless Servomotors series. Designed for closed-loop industrial axes, the motor converts drive output into continuous torque for position or velocity regulation on automated gantries, feeders, or indexing tables. Its construction pairs a magnet rotor with stator windings tuned for fast current rise, supporting precise motion in packaging and assembly duties. When driven digitally, it delivers repeatable start-stop profiles on short indexes.

With a frame coded as NEMA Size 34, the unit occupies the mounting envelope common to many size 34 stepper and servo platforms. Its internal three-stack lamination, indicated by the stack length multiple of 3, increases rotor active length for higher torque at low speed. During stall tests at a bus voltage up to 240 VAC, the winding draws a nominal stall current of 11.0 ARMS, which helps determine drive sizing and cable ampacity. Power phases exit the housing through flying leads with AMP connectors, so connection to cabinet terminals or intermediate harnesses does not require a molded motor plug. Rotor position feedback is provided by a Hall sensor, enabling six-step commutation and permitting use with drives that do not employ high-resolution encoders.

The shaft terminates in a shaft flat rather than a keyway, giving quick coupling to pinch-type pulleys while minimizing machining complexity. Environmental protection is improved by a built-in shaft seal, and the windings are temperature-monitored through an embedded PTC thermistor that signals the drive before thermal limits are exceeded. These features are included on this model for applications that need added sealing and winding temperature monitoring. The motor is produced by Pacific Scientific for use in closed-loop motion systems where simple commutation feedback and direct cable termination are preferred.