PMB31D-20114-00

Product Description:

The PMB31D-20114-00 servo motor from Pacific Scientific joins the PMB Brushless Servomotors group with specs aimed at both precision work and dependable strength. The NEMA Size 34 frame gives decent rigidity, which helps when putting together systems that shake or might see some bumps. Inside, the motor handles a continuous stall torque of 2.11 Nm along with peak torque at 6.26 Nm, both sending steady force without too much slip during quick motion shifts. A rotor inertia of 0.137 kgm²×10⁻³ keeps the stops and starts sharp, not sloppy, and suits setups demanding tight movement.

A digital encoder with commutation makes feedback fast and clean, so motor movements line up with where the control gear wants them. Connectors land as flying leads with AMP connectors, which slip into harnesses well and save time during install or switchouts. Weight comes in at 2.5 kg, so this motor fits wherever bulkier units could make trouble on shelves or moving arms. The encoder resolution hits 2048 ppr, giving small step detail for jobs with fussy tracking needs. That’s useful when running automation lines, test machines, or anything that watches sensor readings close.

Protection stacks up too—thermal resistance is set at 1.08 °C/Watt and the thermal time constant hits 28 min, never letting temperatures get out of control in most cases. For friction, the motor’s static max is 0.09 Nm and viscous damping comes in at 0.0124 Nm/kRPM, which keeps drag low so speed or torque don’t drop hard on long cycles. Built mostly for industrial roles, the PMB31D-20114-00 fits well in spots where feedback, rapid speed changes, or accuracy are high on the list—like pick-and-place robotics, conveyors, or lab gear. Tight connections, high accuracy, and stable power show the real use behind all those numbers.