Product Description:

The P21NSXS-LSS-NS-08 stepper motor is manufactured by Pacific Scientific as part of the POWERMAX II P Motors series. Designed for open-loop positioning tasks, it converts pulse commands from a drive into discrete shaft increments, making it suitable for conveyors, small indexing tables, and light assembly stations in industrial automation. The motor’s standard construction and NEMA mounting provisions allow straightforward integration without custom brackets or couplings.

A NEMA 23 frame combined with a 52.3 mm body length gives the motor a compact overall envelope, allowing it to fit tight equipment bays while still delivering the torque typical of this package size. Hardware attachment follows the NEMA mounting style with a 2.625 in bolt circle, so the unit centers accurately on face plates. Motion is produced in 1.8 degrees per full step, yielding 200 discrete positions per revolution; this resolution can be microstepped electronically when finer indexing is required. Native repeatability remains within ±1.5 %, supporting applications that can tolerate minor deviation without closed-loop feedback. A two-phase winding, one rotor stack, and a standard rotor geometry establish the electromagnetic circuit, while the special coil design matches Pacific Scientific drive currents. Power conductors exit through a receptacle, simplifying cable replacement during service.

The shaft rides on a 30 mm bearing set that supports radial loads and minimizes runout over the service life of the unit. Thermal operation is rated for continuous use from -20 °C to +40 °C, and the windings use Class B, 130 °C insulation so core temperatures stay within allowable limits under normal duty. Dielectric integrity is supported by 100 Megohms of insulation resistance and a withstand rating of 340 Vdc, which helps protect control electronics from leakage currents. No encoder is fitted, which simplifies wiring while still meeting positional requirements for stepper-based systems.