E31NRHT-LNN-NS-01 Kollmorgen
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The Kollmorgen E31NRHT-LNN-NS-01 hybrid stepper motor is part of the E Hybrid Stepper Motors series and features a NEMA 34 frame size with NEMA mounting. It offers a holding torque of 2.38 Newton-meters and supports a rated current per phase of 5.4 Amps with a phase resistance of 0.29 Ohms. The motor weighs 1.45 kilograms and provides 200 steps per revolution with a step angle of 1.8 degrees.
Internal Product Review
The E31NRHT-LNN-NS-01 is a Kollmorgen hybrid stepper motor with a NEMA 34 frame and 2.38 N·m holding torque. A 1.8-degree step angle and ±1.5% step accuracy support dependable indexing and clean position control. The 4-lead parallel configuration is especially well suited for maximum torque at low speed.
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Product Description:
The E31NRHT-LNN-NS-01 hybrid stepper motor is produced by Kollmorgen as part of the E Hybrid Stepper Motors series. Using SIGMAX construction and a single magnetic stack, it converts pulse commands into incremental rotation for indexing tables, pick-and-place units, and other positioning axes. A smooth shaft, NEMA mounting face, and standard lead-wire connection allow the motor to fit standard mechanical frames without adapters. Its frame size is suited to commonly used mounting brackets, supporting installation in established equipment lines.
Each of the four parallel leads uses an 18 AWG conductor and carries up to 5.4 A per phase through a 0.29 Ω winding with an inductance of 2.5 mH. This low-impedance profile supports a winding optimized for maximum torque at low speed. Static output reaches a holding torque of 2.38 N·m within a NEMA 34 frame, while the rotor inertia of 0.0083 oz-in-s² supports responsive acceleration. A full revolution consists of 200 steps with a 1.8° step angle, and positional error remains within ±1.5% because of the SIGMAX flux paths. Thermal management is aided by a thermal resistance of 3.9 °C/W. Within the -20 °C to +40 °C operating range, heat produced by the windings is transferred to the housing and away from the insulation system.
The shaft supports an axial thrust of up to 801 N, while radial side loading is permitted up to 156 N. The motor has a mass of 1.45 kg, allowing overhung equipment to be sized without placing excessive stress on the bearings. The windings provide Class B thermal endurance at 130 °C to protect the insulation during operation. They also maintain an insulation resistance of 100 MΩ to ground and tolerate a 340 V DC dielectric test. These electrical safeguards reduce the risk of insulation breakdown when the motor operates within its stated temperature and loading limits.
