Product Description:

The M21NRXA-LNN-NS-00 is a stepper motor manufactured by Pacific Scientific within the POWERMAX II M Motors series. Designed around a NEMA mounting pattern, the device uses a two-phase winding and a single rotor stack to translate command pulses into incremental shaft rotation for conveyor indexing, light machine-tool feeds, and general automation axes. Its enhanced construction provides tighter mechanical tolerances and improved thermal behavior over standard builds, while the regular lead-wire connection style simplifies integration with common bipolar drives.

The motor uses a NEMA 23 frame, giving it a 57.15 mm square body that accepts standard face mounts. Each full step advances the shaft by 1.8 degrees, so the motor produces 200 discrete positions per revolution with a step accuracy of ±1.5%. A static holding torque of 1.00 N-m resists external loads when the windings are energized, and the smooth, single-ended shaft measures 6.35 mm in diameter and 20.57 mm in length. Total mass is 0.68 kg, which supports low-moment applications that need quick movement with minimal reflected inertia. Under axial load conditions, the shaft can accept up to 58 N without exceeding bearing limits. The body length is 52.3 mm, and a receptacle termination routes two coil leads for winding type A.

For side-loading conditions, the bearing set tolerates a radial force of 89 N at the reference location, complementing the low rotor inertia of 0.00001186 kg·m² to help keep resonance manageable during rapid acceleration. Safe operation spans ambient temperatures from -20 °C to +40 °C, and the Class B insulation system withstands a maximum winding rise to 130 °C while providing up to 340 Vdc isolation between the windings and the frame. No encoder is included, so the motor is intended for open-loop control or microstepping without position feedback, and the smooth shaft modification allows direct coupling to pulleys or flexible couplers without additional machining.