Product Description:

Pacific Scientific’s POWERMAX II P Motors series includes the P21NSHS-LNF-NS-02, a hybrid stepper motor built for general-purpose positioning in automated test fixtures, pick-and-place heads, and small gantries. The motor converts electrical pulses from a controller into incremental rotary motion so mechanical axes can be indexed without closed-loop feedback. By following an open-loop command sequence, the drive can hold static torque at each commanded detent, providing repeatable alignment in compact machines where servo feedback is unnecessary.

The stator package follows the NEMA 23 frame outline, giving an across-flats dimension of 57.1 mm and a body length of 52.3 mm. Each full step advances the shaft by 1.8 degrees, so the rotor completes 200 discrete positions per revolution under its two-phase winding pattern. Mechanical registration is supported by a mounting bolt circle of 66.67 mm and 5.08 mm through holes on the NEMA faceplate. The single-stack construction keeps inertia low, while the flat on the single shaft mates directly with set-screw couplers. Its standard rotor design supports predictable detent torque. Thermal limits are supported by a Class B, 130 °C insulation system, allowing continuous duty within an ambient range of -20 °C to +40 °C.

Electrical connection is parallel through a 4-lead harness, so the windings can draw higher current at lower impedance when paired with a bipolar drive. The motor maintains position accuracy to ±1.5% per step, and it is supplied without a feedback device. Dielectric protection includes an insulation resistance of 100 Megohms and an insulation rating of 340 Vdc, helping protect the coils during high-potential testing. A 6.35 mm diameter stainless-steel shaft carries the load, and its profile is finished with a ground flat to help prevent slippage. Standard construction balances torque and smoothness in light industrial positioning tasks.