Product Description:

The PMB33E-20214-01 brushless servomotor is manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. This permanent-magnet unit converts electrical power into controlled rotary motion for closed-loop positioning tasks in industrial automation such as gantry axes, indexing tables, and packaging machinery. By combining the electromagnetic core of the series with an integral digital feedback device, the motor provides both torque production and real-time position data to a compatible drive. It is intended for use with 240 VAC class servo amplifiers and installs directly on standard machine mounts.

Key physical and electrical parameters determine how the motor fits into the machine frame and control cabinet. The frame follows the NEMA size 34 standard, giving a 3.38-inch square face for direct bolt-up to common gearboxes and brackets. Under 240 VAC excitation, the winding can sustain a nominal stall current of 7.4 ARMS, a value that guides drive sizing for continuous static loads. Power and feedback exit the housing through flying leads with MS connectors, allowing quick changeover without rewiring the cabinet plug. Rotor position is detected by a digital encoder with commutation that delivers 2048 ppr incremental signals, letting the controller regulate velocity with very fine position resolution.

A factory-installed shaft seal helps keep debris away from the front bearing during washdown cycles. Torque is delivered through a stainless steel shaft machined with a square key, giving positive drive to pulleys or couplings at modest radial loads. The electromagnetic stack is built to length code 3, enabling higher continuous torque than shorter stacks while preserving the same frontal footprint. The seal and keyed shaft support coupling arrangements that must resist contamination and transmit torque without slip during repeated motion cycles.