Product Description:

The M21NSXA-LDN-HD-02 is a hybrid stepper motor manufactured by Pacific Scientific for the POWERMAX II M Motors series. As a motion element, it translates digital step commands into precise incremental rotation for pick-and-place heads, indexing tables, and small machine tools in industrial automation. The motor follows the enhanced construction rules of the series and is suited for compact motion axes that need repeatable indexing in transfer units, feeders, and small machine assemblies.

The motor uses the NEMA 23 frame, so its flange and pilot match common motion hardware. It has a holding torque of 1.00 N·m, and a fine 1.8-degree step angle yields 200 steps per revolution while keeping step accuracy within ±1.5%. That resolution supports repeatable indexing in feeders, valves, and transfer mechanisms. Single-stack construction, a standard rotor, and a detent torque of 0.066 N·m reduce cogging, while the A winding has a phase inductance of 0.7 mH. During full-step operation, each phase draws 5.6 A DC through a phase resistance of 0.23 Ω, which supports fast torque rise with moderate copper loss. Two electrical phases exit through a receptacle connector.

Dynamic response benefits from the low 0.00001186 kg·m² rotor inertia, allowing fast starts and stops. The housing is 52.3 mm long and the assembly weighs 0.68 kg, which helps keep cantilever loads low in compact mechanisms. Shaft limits of 58 N axial and 89 N radial suit belt or gear coupling on the double smooth shaft, and these limits help the motor handle light side loads without overstressing the bearings. Continuous duty is permitted between −20 °C and +40 °C, and Class B insulation, 100 MΩ insulation resistance, and a 340 Vdc dielectric rating protect the windings. A 500 LPR encoder powered from +5 V ±10% can mount directly on the rear NEMA face for closed-loop verification.