Product Description:

The PMB33E-20114-01 is a brushless servomotor produced by Pacific Scientific in the PMB Brushless Servomotors series. The unit serves as a rotary actuator that converts drive current into controlled motion for indexing tables, pick-and-place axes, and other automation stages that demand precise speed and position feedback. Its brushless design supports smooth response during repeated starts, stops, and short positioning moves in automated equipment. It is suited to motion systems that require repeatable positioning during continuous production cycles.

This model uses a NEMA Size 34 frame, which provides standard mounting and shaft dimensions that match common gearheads and couplings. Rotor position is reported by an incremental encoder delivering 2048 ppr, allowing the drive to command small step changes without loss of accuracy. When locked at rated torque, the motor draws a nominal stall current of 7.4 ARMS from a 240 VAC amplifier, a figure used to size power electronics and cabling for continuous duty. Power, hall, and feedback conductors exit the housing as flying leads with AMP connectors; this factory-terminated harness keeps wiring organized and preserves polarity. Commutation and feedback are combined in a digital encoder with commutation, so phase information reaches the drive without separate resolver lines.

The output shaft is machined with a square key, enabling simple torque transmission to sprockets or pulleys with minimal backlash. A factory-installed shaft seal limits lubricant loss and blocks contaminants from reaching the front bearing, which helps protect the drive end in dusty or humid environments. The magnetic stack length uses a multiple of 3, increasing copper volume and magnetic path length so higher continuous torque is available without enlarging the motor diameter. This arrangement supports stable operation where compact motor size and dependable mechanical coupling are both important.