Product Description:

The H31NRFA-LNN-NS-00 is a hybrid stepper motor manufactured by Kollmorgen as part of the H Hybrid Motors series. It combines a toothed stator with a permanent-magnet rotor. Discrete electrical pulses from a stepper drive result in precise angular movement, making the unit suitable for indexing tables, small conveyors, and inspection tooling in automated lines.

With a frame that follows the NEMA 34 standard, the motor mates directly with common gearboxes and face mounts. Its housing projects only 2.58 in from the mounting surface, an advantage when space behind a panel is limited. A smooth shaft simplifies coupler selection, and the NEMA mounting style aligns with standard pilot diameters. Eight pre-tinned leads exit in a regular leadwire configuration, with a minimum lead length of 12 in and a conductor size of 22 AWG to support quick termination to drives. Single-stack construction limits rotor mass, yet the device can deliver 1.71 N·m of holding torque. Low reflected inertia, quantified at 0.0083 oz-in-s², permits rapid acceleration. Each full step corresponds to increments of 1.8 degrees, and positional deviation stays within ±1.5%, which is useful for open-loop positioning tasks. Thermal design yields a resistance of 3.9 °C/W, and the motor operates across -20 °C to +40 °C without derating.

Electrically, the windings are insulated to Class B, with a dielectric rating of 340 Vdc and a minimum insulation resistance of 100 megohms, ensuring reliable isolation when driven by micro-stepping amplifiers. Eight leads allow series or parallel connection schemes for high-current or low-current modes. The rotor completes 200 discrete steps per revolution, supporting fine indexing without encoders. Overall mass is only 3.2 lb, so the motor can be mounted on lightweight stages without overloading linear bearings.