Product Description:

The PMB31B-10114-00 brushless servomotor is produced by Pacific Scientific as part of the PMB Brushless Servomotors series. It is a permanent-magnet unit intended for closed-loop positioning and velocity control in automated machinery, where compact torque sources are integrated with digital drives for precise motion in packaging lines, robot axes, and conveyor sequencing tasks. Its brushless design supports precise speed changes because electronic commutation replaces mechanical brushes and reduces wear during repeated motion cycles. The motor uses a Round shaft, which simplifies coupling to gearheads or timing pulleys without the stress concentrations that can occur on keyed shafts.

It uses a NEMA Size 34 frame, so mounting interfaces match the common 3.4-inch square pattern found on many gantry and material-handling stations. Rotor position data comes from an integrated encoder that delivers 2048 ppr of feedback pulses, and the built-in Digital Encoder with commutation channel also provides three Hall signals so the drive can align phase currents automatically. Continuous output torque at zero speed is supported by a nominal stall current of 2.7 ARMS when the motor is supplied from a 240 VAC bus, allowing the inverter and cabling to be sized accurately. Power and feedback conductors exit the housing as Flying leads with AMP connectors, providing quick plug-in installation instead of a hard-wired terminal box.

The motor uses a 1 stack length multiple, giving it a shorter package and lower inertia for rapid acceleration. Pacific Scientific supplies this unit as a Standard Motor, meaning no special winding or bearing modifications are applied. That standard configuration suits general servo applications that do not require custom mechanical or electrical options. The drive and motion platform can therefore be matched directly through Pacific Scientific for standard servo use.