Product Description:

The M22NRXA-JDF-M1-00 is a two-phase stepper motor produced by Pacific Scientific within the POWERMAX II M Motors series. Designed for positioning and indexing tasks in industrial automation, the unit fits the NEMA mounting format common to compact machinery and provides discrete angular movement through electrical pulse commands. Its construction gives machine builders a direct-drive element that converts digital control signals into accurate mechanical rotation without reduction gearing.

This motor is built on a NEMA 23 frame and employs an internal low-inertia rotor to shorten acceleration times. Each electrical pulse advances the shaft by 1.8 degrees, so one full revolution requires 200 steps per revolution. Step accuracy is held within ±1.5 %, aided by the two-stack configuration that increases detent torque without enlarging the frame. The winding is type A and the coils tolerate up to 340 Vdc against ground while maintaining 100 Megohms of insulation resistance. A Class B, 130°C insulation system supports continuous duty inside control cabinets that experience moderate heat. The enhanced construction rating reflects additional mechanical stiffening around the stator laminations, and an encoder-mounting provision on the endbell allows closed-loop upgrades when feedback is required.

Regular leadwires exit through a receptacle, giving a sealed connection path to drives, and the overall mounting style follows the NEMA template for interchangeability with existing brackets. Axial thrust is limited to 13 lb while side loading must stay below 20 lb to safeguard the bearings. The shaft is double-ended, ground to 0.2500 in diameter, and finished with a flat so pulleys or couplings lock without keys. Continuous service is specified from -20°C to +40°C, matching typical enclosure climates. A low-profile encoder can be added without altering the footprint, and the two lead terminations simplify parallel or series wiring schemes that exploit the dual-phase architecture.