Product Description:

The M22NRXC-LNN-NS-00 is a two-stack stepping motor built by Pacific Scientific for the POWERMAX II M Motors series. Within automated pick-and-place stations, small conveyors, or indexing tables, the unit converts pulse commands from a drive into fixed angular increments, providing open-loop motion control without an onboard sensor. No feedback device is fitted, so position is tracked from commanded step counts.

This model withstands an axial thrust of 13 lb (58 N), so lead-screw couplings can preload the shaft without damaging the bearings. Overall length is limited to 3.10 in (78.7 mm), allowing installation in compact machine frames. The frame conforms to NEMA 23, and the mounting style uses a 2.625 in bolt circle, 0.200 in clearance holes, and a 1.500 in pilot. A regular lead-wire connection routes phase conductors out of the housing, and the receptacle designation indicates a single mating plug. The enhanced construction, C-type windings, and insulation capability up to 340 Vdc help protect the coils. Class B insulation, 100 MΩ resistance, and a 4.5 °C/W thermal path keep winding temperature within limits when ambient air remains in the range of −20 °C to +40 °C.

Lateral belt tension is handled by a 20 lb radial rating, and the standard rotor’s 0.0036 oz-in-s² inertia balances acceleration with damping. A single, smooth shaft measures 0.2500 in (6.35 mm) in diameter, matching common couplers. Positional tolerance is maintained within +/- 1.5 % of a theoretical move, each increment is 1.8 degrees, and the motor makes 200 discrete steps per revolution. Two laminated stacks provide the required detent torque, while the 2.5 lb mass eases gantry loading. The motor’s B-class insulation supports a 130 °C winding temperature, and the smooth shaft modification eliminates keyway stress points.