Product Description:

The PMB33C-00116-03 is a brushless servomotor built by Pacific Scientific for the PMB Brushless Servomotors series. As a permanent-magnet rotary actuator, it delivers closed-loop torque, speed, and position control to indexing tables, gantry axes, and other automated stages that require repeatable motion with low electrical noise. Its compact construction follows NEMA conventions, allowing installation in standardized mounts, while the stator windings are optimized for operation from 240-volt industrial drive amplifiers.

The electrical interface relies on flying leads with AMP connectors, so power, feedback, and protective earth can be connected without separate junction boxes. Within the housing, a high-density encoder generates 4096 ppr of incremental pulses, giving drives fine position granularity for smooth velocity loops. The frame corresponds to NEMA Size 34, balancing torque capability with envelope constraints in packaging machines or small conveyors. Under locked-rotor conditions, the windings draw a nominal stall current of 3.8 ARMS when supplied from 240 VAC, a value used for sizing drive output stages and circuit protection. Rotor feedback is delivered by a digital encoder with commutation, eliminating Hall sensors and simplifying cable sets.

For harsh or thermally sensitive installations, the motor is shipped with a shaft seal and PTC thermistor that improve ingress resistance and allow temperature monitoring by the controller. The output shaft is machined with a flat, providing positive slip-free coupling to pulleys or gears without keys. Torque density is influenced by a magnetic stack length multiple of 3, giving higher continuous ratings than shorter variants in the same diameter. The motor supports rapid acceleration, and the PTC thermistor allows temperature monitoring during operation.