Product Description:

The P21NRHS-LNF-NS-02 stepper motor is manufactured by Pacific Scientific for the POWERMAX II P Motors series. As a hybrid unit that indexes discrete positions, it supplies open-loop positioning for conveyors, small gantries, and metering valves inside automated machinery. The device suits applications that require repeatable incremental motion without closed-loop feedback, allowing simple drive electronics to advance the rotor in synchronized 1.8-degree steps.

At a NEMA 23 frame size, the motor matches common 57 mm mounting patterns, while the compact 2.06 in (52.3 mm) body length keeps enclosure depth minimal. The 200 full steps per turn come from its 1.8 degrees step angle, yielding 0.9-degree resolution in half-step mode. A 0.2500 in (6.35 mm) single shaft exits the front face, and its ground flat simplifies set-screw coupling and helps prevent slippage under load. Four parallel leads emerge in a regular lead-wire style so the phase windings can be wired for low inductance, and the 2.625 in (66.67 mm) mounting bolt circle aligns with NEMA brackets for quick retrofit. One rotor stack, standard construction, and a standard rotor design balance holding torque with low inertia while supporting ±1.5% step accuracy under rated conditions.

The motor tolerates ambient temperatures from -20 °C to +40 °C, allowing use in most factory environments. Windings are built with Class B, 130 °C insulation, and the motor has a 340 Vdc dielectric strength rating between the windings and frame. Insulation resistance is 100 Megohms, which helps limit unwanted current paths. The 4-lead parallel configuration presents low resistance for higher peak pulse currents, and the absence of feedback electronics simplifies wiring. Regular lead wires exit the frame in a standard style, and the no-encoder configuration leaves room for external sensors if required.