E31NRLT-LNF-NS-00 Kollmorgen
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The Kollmorgen E31NRLT-LNF-NS-00 is a NEMA 34 frame stepper motor from the E Hybrid Stepper Motors series with a holding torque of 337 oz-in and a rated current per phase of 2.7 Amps. It has a bolt circle of 3.875 inches, operates with a phase inductance of 10 mH, and supports an operating temperature range from -20°C to +40°C. The motor is constructed using SIGMAX construction and weighs 3.2 pounds.
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Product Description:
The E31NRLT-LNF-NS-00 is a hybrid stepper motor manufactured by Kollmorgen as part of the E Hybrid Stepper Motors series. Designed for incremental motion tasks in industrial automation, it uses a NEMA 34 frame and mounts on a 3.875-inch bolt circle. Its SIGMAX construction concentrates magnetic flux to improve torque production within the motor frame. A step angle of 1.8 degrees allows the rotor to index through 200 discrete positions per revolution. This predictable movement supports open-loop positioning in machinery that does not use a feedback device. The motor can drive indexing tables, material-feeding mechanisms, and other systems that require repeatable incremental rotation.
The motor housing is 2.58 inches long and centers on a 2.875-inch pilot within the NEMA mounting arrangement. Its smooth shaft supports an axial load of 180 pounds, while the bearings withstand a radial load of 35 pounds. The single-stack rotor has an inertia of 0.0083 oz-in-s² and is wound to provide high torque at low speed. It develops a holding torque of 337 oz-in, helping the shaft resist movement while the windings remain energized at standstill. Power reaches the windings through a regular lead-wire arrangement. Four leads are connected in series for operation with drives that can supply 2.7 A per phase. The common frame format supports installation with compatible brackets and couplings without requiring a custom mounting pattern.
The motor has a phase inductance of 10 mH and a phase resistance of 1.12 ohms, which affect the current response produced by the connected stepper drive. Heat leaves the windings through a thermal resistance of 3.9 °C/W. A Class B insulation system rated to 130 °C protects the windings from excessive operating temperatures. The insulation resistance is 100 megohms, and the windings withstand a test potential of 340 VDC. The permitted ambient operating temperature ranges from -20 °C to +40 °C. At a weight of 3.2 pounds, the motor can be installed without placing excessive mass on compact machine structures. Its electrical and thermal limits support continuous operation when the applied phase current and surrounding temperature remain within the stated ranges.
