Product Description:

The H31NRFP-LNN-NS-00 is a hybrid stepper motor produced by Kollmorgen and supplied under the H Hybrid Motors series. As a two-phase stepping device, it indexes machinery in packaging, semiconductor handling, and light gantry axes that demand open-loop positional control without an encoder. The motor follows NEMA mounting conventions, allowing it to replace existing stepper stages while keeping wiring simple through a regular lead-wire harness.

This model uses a NEMA 34 frame, and its laminated stack is 65.5 mm long, so it fits compact machine layouts while still delivering 1.69 N·m of static holding torque for stall-state load retention. Each electrical step advances the shaft by 1.8 degrees, producing 200 full steps per revolution with ±1.5% accuracy, and smooth motion is supported by a winding optimized for maximum torque at high speed. The eight leads may be wired in parallel, where the motor draws 8.4 A and has a phase inductance of 1.0 mH together with only 0.13 ohms of phase resistance, so the time constant stays low for rapid current rise. Insulation is Class B at 130 °C and withstands 340 Vdc with 100 MΩ of resistance, while a thermal resistance of 3.9 °C/W helps dissipate heat through the housing. A smooth shaft carries up to 801 N axially and 156 N radially, with standard construction suited for moderate side loads.

The permissible ambient span is -20 °C to +40 °C, which suits factory floors that lack full climate control. Dynamic response benefits from a rotor inertia of 0.0083 oz-in-s², and the single-stack layout helps reduce detent ripple. Eight-lead connectivity also supports series wiring for lower-current applications, and the NEMA mounting flange simplifies attachment to gearheads when higher torque is needed. The regular lead-wire exit helps cable routing in multi-axis assemblies, and the motor’s 1.45 kg mass adds thermal capacity for brief overloads without pushing the insulation system to its limit.