Product Description:

The PMA44R-1050B-08 is a brushless servomotor manufactured by Pacific Scientific within the PMA Brushless Motors series. Designed for closed-loop motion axes, the unit converts electrical energy into tightly regulated rotary power for indexing tables, pick-and-place heads, and other positioning loads in industrial automation cells. Because it is a permanent-magnet synchronous design, it works with matched digital drives to sustain repeatable velocity and torque under varying load conditions. The motor’s frame dimensions align with standard IEC machinery openings, simplifying installation into multi-axis assemblies.

The motor delivers a continuous stall torque of 8.2 Nm, allowing it to hold static loads without overheating when the axis is at rest. For fast acceleration or short overloads, it can reach a peak torque of 29.4 Nm, which gives ample headroom for rapid duty cycles. Dynamic response is assisted by the low rotor inertia of 0.68 × 10⁻³ kg·m², so the drive must overcome less rotational mass to change speed. When stalled, the windings draw a nominal current of 11.0 ARMS, so a controller with that continuous output capacity is required. The windings are insulated for a voltage range of 240–480 V AC, enabling the same model to run on common industrial supply levels without rewinding.

Mechanically, the square housing measures 115 mm across the mounting face, giving a compact footprint relative to its torque rating. The motor weighs 9.0 kg, which should be considered when selecting brackets and linear carriages. The motor has a stack length of 4, which increases copper volume and torque density while keeping the frontal size unchanged. Power is transmitted through a shaft with a closed keyway, supplied with its key already fitted to maintain alignment under cyclic reversing loads. The motor is supplied without a brake, so an external holding device is required for power-off position retention.