Product Description:

The PMB31D-10214-03 is a brushless servomotor engineered by Pacific Scientific within the PMB Brushless Servomotors series. Designed for closed-loop motion axes in industrial automation, the unit converts electrical input into controlled rotary torque and speed for packaging machinery, pick-and-place heads, and material-handling stages. Its brushless architecture reduces maintenance demand by avoiding brush wear during repeated start-stop cycles. The motor also uses digital feedback so the associated servo drive and PLC can maintain accurate synchronization during positioning and speed regulation.

Mechanical mounting follows the NEMA Size 34 frame standard, allowing installation on drive plates sized for that footprint. Power and signal connections use flying leads with MS connectors, so cables can be routed through energy chains before the circular plugs are attached at the drive cabinet. Rotor position is reported by a 2048 ppr incremental track, supplying dense edge counts for fine velocity and position control. Continuous electromagnetic loading at 240 V AC produces a nominal stall current of 5.4 ARMS, a value used to match the drive amplifier’s RMS output capability. Commutation information comes from a digital encoder with commutation, which supports smooth low-speed torque without separate Hall devices.

Application flexibility is improved by an integrated shaft seal, which helps block lubricant migration and airborne debris at the output end. An embedded PTC Thermistor signals the drive when winding temperature approaches its limit, adding thermal protection during sustained duty. The motor uses a round shaft so couplings or pulleys can slide on without keyway alignment, which can simplify installations where low backlash is important. It also uses stack length multiple 1, the shortest lamination build offered for this model, which helps reduce rotor inertia and supports rapid acceleration cycles.