E31NRHT-LDN-NS-00 Kollmorgen
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The Kollmorgen E31NRHT-LDN-NS-00 is a stepper motor from the E Hybrid Stepper Motors series, featuring a NEMA 34 frame size and SIGMAX construction. It offers a holding torque of 2.38 Newton-meters and a step angle of 1.8 degrees with 200 steps per revolution. The motor is rated at 5.4 Amps per phase and operates within a temperature range of -20 to 40 degrees Celsius.
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Product Description:
The E31NRHT-LDN-NS-00 hybrid stepper motor is produced by Kollmorgen within the E Hybrid Stepper Motors series for indexing and speed-controlled axes in industrial automation. Its SIGMAX construction concentrates magnetic flux to increase torque density, while a regular lead-wire connection supplies power through a four-lead parallel arrangement suited to unipolar or bipolar drives. The single-stack rotor is mounted on a smooth shaft that measures 9.53 mm in diameter and extends 31.75 mm from the front face. Class B insulation, rated for 130 °C, protects the windings during continuous operation, and the winding design favors maximum torque at low speeds.
The motor produces a holding torque of 2.38 N·m when fully energized, and each phase can be driven with 5.4 A of current. Low copper loss is supported by a phase resistance of 0.29 Ω. The phase inductance is 2.5 mH, which establishes the electrical time constant used by microstepping drives. Motion resolution is governed by a 1.8-degree step angle that is maintained within an accuracy range of ±1.5%. Dielectric integrity is supported by an insulation resistance of 100 MΩ and an insulation voltage rating of 340 VDC.
The frame follows the NEMA 34 outline and has a body length of 65.5 mm. Its mounting interface includes a 98.43 mm bolt circle around a 73.025 mm pilot, allowing direct installation on compatible machinery. Four mounting holes, each measuring 5.46 mm in diameter, secure the housing to the machine structure. The motor can operate at ambient temperatures from -20 °C to +40 °C without derating. Position control is delivered through 200 full steps per revolution, while compatible drives can use microstepping to provide finer motion increments. The low-speed torque characteristics support controlled movement in conveyors, dispensers, indexing tables, and gantry axes.
