Product Description:

The PMB33E-00214-02 is a brushless servomotor built by Pacific Scientific within the PMB Brushless Servomotors series. This rotary actuator converts drive current into controlled torque and speed for axes in packaging machines, pick-and-place units, and other motion cells. When paired with a compatible servo amplifier, it provides precise position feedback and fast dynamic response for closed-loop industrial automation lines. Its brushless construction supports smooth acceleration and repeatable motion on axes that start and stop frequently.

Its frame follows the NEMA Size 34 outline, so mounting holes, pilot, and shaft height match common U.S. mechanical interfaces. Power and feedback conductors exit the stator as flying leads with MS connectors, allowing sealed cable runs without a terminal box. Rotor position is reported by a digital incremental encoder that delivers 2048 ppr resolution, and the same sensing package carries commutation tracks so phase switching is automatic. During stall at the rated supply, the winding draws up to 7.4 ARMS. That current level helps determine the continuous output range required from the connected amplifier. The electronics rely on a digital encoder with commutation rather than Hall sensors, which gives finer interpolation and reduces torque ripple at low speed.

The output shaft is machined with a flat, so couplings can clamp without keys and still resist slip during reversals. A built-in PTC thermistor sits in the stator slot and changes resistance sharply near the allowable winding temperature, giving the drive a signal to reduce current before insulation stress occurs. Magnetic stack design uses length multiple 3, which balances torque density with inertia for mid-range load profiles. The chosen stack length suits servo axes that cycle quickly but do not require a larger motor frame.