Product Description:

The PMB33C-10101-02 is a brushless servomotor produced by Pacific Scientific and included in the PMB Brushless Servomotors series. As a compact rotary actuator, it converts electrical energy from a matched drive into controlled torque and speed for indexers, pick-and-place heads, or machine-tool axes. By maintaining synchronous operation with its feedback devices, the motor enables rapid position moves and tight velocity regulation that are required in automated assembly cells and material-handling equipment.

Mechanically, the motor frame corresponds to NEMA Size 34, so its mounting face and pilot diameter match standardized 3.38-inch square installations often found on mid-range gantries. Internally, a nominal stall current of 3.8 ARMS at 240 V AC is the steady-state phase current the drive must supply to hold maximum rated torque without rotor movement. Power and feedback conductors exit as flying leads with AMP connectors, allowing flexible pigtails to be routed through tight cable tracks instead of fixed plugs. Rotor position is detected by a Hall sensor, which delivers three commutation signals that synchronize the stator field during low-speed and startup conditions. Electromagnetic output is increased by a stack length multiple of 3, indicating three laminated core sections aligned on the same shaft to raise flux density without enlarging the motor cross-section.

Thermal integrity is monitored by an embedded PTC thermistor that changes resistance rapidly near its trip temperature, providing a simple analog input for the drive to reduce current when winding heat approaches its limit. A round shaft simplifies coupling because it accepts collet or clamp hubs without keyways, which is useful in quick-change tooling. The build and magnetics are proprietary to Pacific Scientific, and the motor follows the dimensional and electrical conventions of the PMB Brushless Servomotors series.