Product Description:

The P21NRXF-LNF-NS-00 is a hybrid stepper motor manufactured by Pacific Scientific within the POWERMAX II P Motors series. This NEMA-frame device delivers incremental rotary motion for positioning duties in industrial automation systems such as pick-and-place heads, indexing tables, and light conveyor sections where repeatable, open-loop motion is acceptable. It operates through electromagnetic detents that move the rotor in small angular steps each time the control drive issues a pulse.

Its fundamental resolution comes from a step angle of 1.8 degrees, creating 200 steps per revolution with a step accuracy of ±1.5%. The motor uses a single stack to keep the length low, and the standard rotor inertia is 0.000012 kg·m², which supports fast acceleration. A square-flange frame coded NEMA 23 encloses the 52.3 mm stator assembly and keeps the total mass to 0.68 kg. The single, flat-machined shaft is 6.35 mm in diameter and 20.60 mm long, and it offers 12.70 mm of usable flat for set-screw coupling. Bearings withstand an axial load of 60 N and a radial load of 90 N, while mounting follows the NEMA pattern with a 66.67 mm bolt circle and a 38.10 mm front pilot for centering.

Electrical interfacing is provided through a standard lead-wire harness terminated in a receptacle, so conductors can be routed without special connectors. The winding insulation meets Class B, 130 °C requirements and shows an insulation resistance of 100 Megohms at room temperature, with a dielectric strength of 340 Vdc. Because the housing is ventilated to the environment, the unit carries an enclosure rating of IP23. The maximum surface temperature is limited to 95 °C during operation, and safe service is specified between -20 °C and +40 °C ambient. The standard construction, the absence of feedback devices, and the lead-wire connection style make the motor suitable for open-loop drive packages that rely on current control rather than encoder-based correction.