Product Description:

The PMB33E-00201-01 is a brushless servomotor built by Pacific Scientific and delivered within the PMB Brushless Servomotors series. Designed for closed-loop positioning tasks, the motor supplies commanded torque to conveyors, gantry axes, and light machine tools, integrating directly with a dedicated servo drive for rapid acceleration and precise speed regulation. Its permanent-magnet construction supports high torque density, and electronic commutation permits continuous reversal without brush wear. Because the motor works with a separate servo drive, current and commutation can be adjusted to match the motion profile of the axis.

Connection to system cabling is achieved through flying leads with MS connectors, providing a direct plug-in interface to the drive and feedback wiring. The frame conforms to the industry-standard NEMA Size 34, so the mounting face and pilot diameter align with common gearheads or linear actuators. That standard mechanical format can simplify integration into axis layouts that already use Size 34 mounting hardware. Under worst-case stall at the rated bus, the winding draws a peak of 7.4 ARMS, a value that helps match the motor to an appropriately sized amplifier. That stall figure applies at a supply of 240 Vac maximum, indicating compatibility with mid-range servo amplifiers used in 240 V three-phase panels. Rotor position feedback for commutation is provided by an internal Hall sensor, delivering six-step signals that let the drive switch phases correctly even at zero speed. This arrangement supports stable startup and controlled low-speed operation.

A flat shaft simplifies hub or pulley attachment by helping reduce slip without adding a keyed interface. The motor has a stack length code of 3, which uses a triple-lamination stack and provides more torque than shorter versions in the same series. The shaft arrangement is suited to compact couplings and pulleys used on medium-duty indexing axes. For environments with oil mist or light washdown, the optional shaft seal helps block contaminants from migrating along the shaft-to-bearing interface. This added sealing support helps protect bearing lubricant and keeps the shaft area cleaner during operation.