Product Description:

The PMB33C-20114-02 brushless servomotor is manufactured by Pacific Scientific and belongs to the PMB Brushless Servomotors series. As a three-phase permanent-magnet machine, it converts electrical power into precise rotary motion and provides closed-loop actuation for indexing tables, gantry drives, and similar automation axes. The motor's construction supports high-bandwidth current regulation so a drive amplifier can modulate torque in real time, allowing accurate tracking of commanded speed or position profiles in production equipment. That control behavior is useful on axes that need repeatable starts, stops, and short positioning moves during automated cycles.

Mechanical and electrical interfaces use a NEMA Size 34 frame, which gives the motor a 3.4-inch square mounting pattern compatible with standard motion platforms. Power and feedback lines exit the housing as flying leads with AMP connectors, which simplify wiring without a separate junction box. This cable style allows the motor to connect directly to matching drive and feedback harnesses. The solid steel shaft is machined with a square key so couplings or pulleys can transmit torque without slip. Rotor position is reported by a digital encoder with commutation tracks, and the feedback provides 2048 ppr resolution to the drive. This supports fine velocity and position regulation during low-speed moves as well as at rated speed.

A nominal stall current of 3.8 ARMS indicates the continuous phase current the winding can tolerate at 240 V AC before reaching its temperature ceiling. To protect the insulation, a PTC thermistor is embedded in the stator so the drive can cut power if the winding approaches its trip temperature. The active magnetic length uses a 3-stack lamination, which increases torque density without altering the frame outline or external mounting size.