Product Description:

The PMB33C-00100-03 is a brushless servomotor manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. The motor provides programmable torque and speed so controllers can drive conveyors, rotary actuators, or material-handling joints with repeatable accuracy. By combining permanent-magnet excitation with electronic commutation, the device delivers continuous duty without brush wear. That arrangement also supports smooth closed-loop motion in industrial automation equipment where frequent starts, stops, and reversals are common.

Its frame is rated at NEMA Size 34, which uses a 3.4-inch square mounting face common on many mid-torque axes. The electromagnetic core is built with a stack length multiple of 3, which gives the motor a longer active iron length without changing the bolt pattern. When powered by 240 VAC drives, the motor reaches a nominal stall current of 3.8 ARMS, so the amplifier must supply that current to hold full rated torque at standstill. For feedback, the unit uses a resolver, which provides analog sine-cosine position signals that resist electrical noise and high temperatures. Phase power is carried through flying leads with AMP connectors, which allows direct routing into moving cable systems instead of a fixed terminal block.

A factory-installed shaft seal and PTC thermistor combination helps block oil or coolant ingress at the output and reports winding temperature to the drive for thermal protection. The Flat shaft profile gives the coupling a positive contact surface that helps reduce slip during rapid reversals and repeated indexing. It is suited to equipment that sees contamination, frequent acceleration changes, and extended operating periods. The sealed output area and temperature monitoring also support stable operation when the motor is mounted near process machinery or enclosed mechanisms.