Product Description:

The PMA42P-10100-00 is a brushless servo motor manufactured by Pacific Scientific for the PMA Brushless Motors series. Intended for precision positioning and velocity control, this unit converts electrical energy from a matched drive into regulated mechanical output for industrial automation axes. It belongs to the PMA brushless servomotors product type and integrates a resolver for feedback so the controller can close the position loop accurately. The compact square-frame layout supports rotary actuation where keyed power transmission is required.

At stall, the rotor can deliver a continuous torque of 4.1 Nm, which is the load it can hold continuously without overheating when adequate cooling is available. For short bursts such as acceleration, the motor supplies up to 14.6 Nm, giving a useful dynamic margin over its continuous rating. Those torque figures are achieved while the windings draw 5.4 ARMS at standstill. The insulation supports use with drives in the 240-480 V AC class, so the unit can connect to common three-phase servo amplifiers. A square frame size of 115 mm simplifies mounting to gearboxes or machinery plates that follow NEMA conventions. Because the motor does not include a brake, back-driving or external clamping must be considered, and two lamination sections indicated by stack length 2 contribute to the published torque density.

The rotating assembly carries an inertia of 0.36 × 10⁻³ kg·m², which is low enough for fast stop-start cycles with minimal overshoot. Overall mass is limited to 6.2 kg, easing manual handling during installation. A 6PP six-pin power connector is mounted at a right-angle to the motor body, enabling tight cable runs inside compact enclosures. The closed keyway shaft is delivered with the key installed to help prevent slip under reversing load, and no special design features are listed.