Product Description:

The PMB33E-20116-02 is a brushless servomotor manufactured by Pacific Scientific for the PMB Brushless Servomotors series. Built for mid-torque positioning axes, it converts three-phase input into smooth, high-bandwidth motion suited to indexing tables, moderate-inertia conveyors, and light gantry drives. The motor fits the standardized NEMA size 34 footprint, so it can replace stepper packages without mechanical redesign. Its feedback electronics also integrate with common servo amplifiers to close velocity and position loops in industrial automation cells.

The motor uses a NEMA Size 34 frame, which provides predictable mounting dimensions and shaft height for legacy equipment. Power conductors exit the stator body as flying leads with AMP connectors, allowing direct connection while reducing enclosure depth. Under a supply of 240 VAC, the winding draws a nominal stall current of 7.4 ARMS. This value sets the continuous current setting of the drive and helps size the supply wiring. Rotor position is reported by a 4096 ppr incremental encoder, providing resolution that supports accurate cut-to-length tasks and smooth electronic gearing between axes.

The motor’s sensing chain is completed by a digital encoder with commutation, so the amplifier receives both incremental tracks and correctly phased commutation events from a single connector. Mechanical power transfer uses a square key shaft profile, which helps align couplings during installation and resists slip during bidirectional duty cycles. For thermal monitoring, a PTC thermistor is embedded in the windings, allowing the drive to reduce current or issue a fault before critical temperatures are reached. Additional magnetic material from a core with a stack length multiple of 3 raises continuous torque capacity while keeping the front-to-back length within the limits of typical servo control cabinets.