Product Description:

The PMB33E-10201-03 brushless servomotor is produced by Pacific Scientific as part of the PMB Brushless Servomotors series. It is a permanent-magnet, three-phase actuator intended for closed-loop positioning, speed, and torque regulation in automated machinery and material-handling axes. By generating smooth continuous torque without mechanical commutation, the motor supports conveyors, pick-and-place heads, and compact gantry stages that require precise motion during continuous-duty operation.

Mechanical dimensions correspond to NEMA Size 34, so the frame bolts directly to 3.4-inch square mounting faces common on motion platforms. The electrical design draws a nominal stall current of 7.4 ARMS at 240 VAC, indicating the current level a drive must deliver continuously without rotor movement. Power and feedback terminate on flying leads with MS connectors, removing the need for terminal blocks. Rotor position is detected by a Hall sensor, which provides six-step commutation signals for compatible digital drives. A round shaft lets couplings or pulleys slide on without keyways, which helps minimize stress concentrations at the output end. The electromagnetic package uses a stack length multiple of 3, so three lamination sections are used to raise torque while keeping the external frame size unchanged.

Optional protections include a shaft seal and PTC thermistor. The seal helps block lubricant ingress at the shaft opening, while the thermistor relays winding temperature to the controller for overload protection. This arrangement adds temperature monitoring inside the motor and supports operation where contamination control is important. The motor uses a 33E winding, giving a balance between continuous stall torque and the space available on compact motion axes. It also keeps the mounting footprint unchanged when higher torque is needed from the same frame size.