Product Description:

The PMB33F-20116-03 is a brushless servomotor manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. It is intended for closed-loop motion systems where precise torque and speed control are critical in automated assembly stations, material-handling axes, and light machining spindles. Its role is to translate electrical input from a matched drive into repeatable rotary movement while providing feedback for real-time correction within industrial automation cells. This supports positioning tasks that require stable response during repeated starts, stops, and speed changes.

The motor frame is the standard NEMA Size 34, so it mates directly with gearboxes, couplings, or mounting plates that follow this dimensional code. A nominal stall current of 11.0 ARMS at 240 VAC is the current the drive must supply to hold torque with the rotor at standstill. Power and signal exit the housing through flying leads with AMP connectors, which eliminates an integral plug and allows cable routing through tight machine envelopes. Position data comes from a 12-bit encoder that yields 4096 ppr. This feedback works with the integrated digital encoder with commutation sensor to deliver rotor angle and phase information to the controller. The output shaft uses a square key for rigid, slip-free coupling to pulleys or couplings in indexing mechanisms.

To support demanding duty cycles, the motor is available with a shaft seal and PTC thermistor. The seal helps restrict contaminant ingress, while the thermistor alerts the drive to abnormal winding temperatures. Its electromagnetic section uses a stack length multiple of 3, providing increased core length for higher torque density without altering the NEMA 34 footprint. The longer active stack helps raise output capability while keeping the same mounting size for compact machine layouts.