Product Description:

The M22NRXA-LDN-NS-00 is a hybrid stepper motor manufactured by Pacific Scientific for the POWERMAX II M Motors series. It delivers incremental rotary motion that is useful for pick-and-place stations, small indexing tables, and other axes where the controller advances the load by a known step count rather than by closed-loop feedback. A two-phase winding and standard rotor design allow the motor to produce repeatable positioning events that simplify automation hardware and software.

The motor’s mechanical interface follows the NEMA 23 frame, with a pilot diameter of 38.10 mm and a hole circle diameter of 66.670 mm for alignment with common mounting plates. Each command pulse turns the rotor by 1.8 degrees, producing 200 uniform steps per revolution and keeping displacement error within the ±1.5 % accuracy limit. A detent torque of 0.12 N-m resists accidental movement when power is off, while the double-ended smooth shaft measures 6.35 mm in diameter for direct coupling to pulleys or encoders. The bearing system tolerates an axial thrust of 58 N, and the 20.60 mm front shaft length supports moderate belt tension without premature wear. Thermal resistance is 4.5 °C/W, allowing the 78.7 mm long housing to dissipate heat generated by the A-type winding.

Radial side loading is permitted up to 89 N, allowing flexibility when sprockets or gears apply perpendicular forces. The small rotor inertia of 0.000025 kg-m² enables fast acceleration in indexing cycles, and the overall unit mass is 1.13 kg, which helps limit structural load on moving carriages. Continuous service is rated for ambient temperatures from -20 °C to +40 °C, and the Class B insulation system, qualified to 130 °C, maintains dielectric strength at the winding during elevated coil temperatures. Insulation resistance of 100 MΩ and a 340 Vdc withstand voltage provide additional electrical margin for reliable operation with standard step drive electronics.