Product Description:

The H31NRFB-LNN-NS-00 hybrid stepper motor is produced by Kollmorgen as part of the H Hybrid Motors series. Designed around the NEMA 34 frame, the unit provides open-loop indexing and velocity control for packaging tables, laboratory automation, and general machine axes. Its standard construction uses a single rotor stack and measures 65.5 mm in body length, making it short enough for compact equipment. A smooth 9.53 mm shaft protrudes 31.75 mm to accept pulleys or couplings, and mounting follows the NEMA face pattern so it fits common brackets. Regular leadwire terminations with eight individual leads allow the phases to be wired in series or parallel to match the drive supply.

The motor develops a holding torque of 1.58 N-m, allowing loads to remain fixed when current is applied. Each electrical step advances the rotor by 1.8 degrees, and the motor completes 200 discrete positions per revolution. Step placement error is limited to ± 1.5 %, so cumulative position drift is minimal across multiple cycles. A rotor inertia of 0.0586 × 10⁻³ kg·m² supports rapid acceleration without excessive current demand. Standard leadwire connections and an eight-lead set give flexibility for unipolar or bipolar drive modes. The single-stack magnetic circuit keeps detent torque low.

The shaft can tolerate axial forces up to 801 N and radial loads up to 156 N, supporting belt tension or gear side loads common in material handling. Class insulation is rated at Class B, 130 °C, and insulation resistance is 100 MΩ with a 340 Vdc withstand voltage to help guard against insulation failure. The permitted ambient span of -20 °C to +40 °C suits unheated warehouses as well as enclosed panels, and a thermal resistance of 3.9 °C/W quantifies heat flow from the winding to the case. The motor weighs 1.45 kg, and its shaft dimensions and smooth finish help minimize seal wear when external housings are fitted.