E31NRHC-LSN-NS-02 Kollmorgen
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The Kollmorgen E31NRHC-LSN-NS-02 is a hybrid stepper motor from the E Hybrid Stepper Motors series and features a NEMA 34 frame size with a motor length of 2.58 inches. It provides a holding torque of 316 oz-in and supports 200 full steps per revolution with a step angle of 1.8 degrees. The motor operates at a rated current of 3.0 amps per phase and weighs 3.2 pounds.
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Product Description:
The E31NRHC-LSN-NS-02 is a two-phase hybrid stepper motor manufactured by Kollmorgen for the E Hybrid Stepper Motors series. It translates digital pulse trains from indexers or PLC drives into incremental shaft motion, enabling open-loop positioning for material feeders, small gantries, and metering pumps in industrial automation. By advancing through a fixed angle with each commanded step, the motor provides repeatable motion without external feedback, simplifying wiring and control design.
This model uses a NEMA 34 frame, so its front face and mounting pattern fit standard 3.4-inch-square motor brackets. Each command pulse advances the rotor by 1.8°; therefore, one revolution equals 200 full steps, an industry-standard value that simplifies microstepping calculations. With both phases energized, the motor delivers 316 oz-in (2.23 N·m) of static holding torque, providing ample resistance against process loads while the shaft is stationary. The windings draw 3.0 A per phase, which informs drive selection and power supply capacity. Internally, the phase resistance is 0.94 Ω, limiting current rise, while the 6.9 mH inductance influences the voltage required from the driver. The rotor inertia is 0.0083 oz-in-s², allowing rapid acceleration while providing enough momentum for smooth microstepped rotation during high-throughput duty cycles.
The insulation system is rated at 340 VDC, allowing it to withstand typical unregulated driver voltages and regenerative spikes. The ambient operating range is -20 to +40 °C, making the motor suitable for unheated warehouses and controlled machine enclosures. The shaft supports an axial thrust of up to 180 lb (801 N), while the radial side load is limited to 35 lb (156 N) to protect the bearings. The laminated stator stack is 2.58 inches (65.5 mm) long, which helps keep the overall motor length compact. The unit weighs 3.2 lb (1.45 kg), allowing manageable installation in industrial equipment. When mounted on a heat-sinking surface, the motor has a thermal resistance of 3.9 °C/W, supporting continuous operation at rated current without exceeding the insulation class limits.
