E31NRHT-LDNM3-00 Kollmorgen
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The Kollmorgen E31NRHT-LDNM3-00 is part of the E Hybrid Stepper Motors series and has a frame size of NEMA 34 with a body length of 65.5 mm. This stepper motor provides a holding torque of 2.38 N·m and features a double shaft configuration with SIGMAX construction. It offers a rated current per phase of 5.4 A, step angle of 1.8 degrees, and weighs 1.45 kg.
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Product Description:
The E31NRHT-LDNM3-00 hybrid stepper motor is built by Kollmorgen in the E Hybrid Stepper Motors series for incremental positioning tasks in industrial automation. It advances equipment with open-loop control, using 200 full steps per revolution and ±1.5% accuracy to position loads without feedback. A body length of 65.5 mm and a mass of 1.45 kg keep the unit compact, while the double-ended shaft permits coupler or sensor attachment on either side. The winding is tuned for maximum torque at low speed, making the device suitable for direct-drive tables and pick-and-place axes.
At stall, the rotor withstands 2.38 N·m of torque before losing position. Each drive pulse turns the shaft by 1.8°, providing predictable motion increments. The windings draw 5.4 A per phase. Their low impedance, consisting of 0.29 Ω resistance and 2.5 mH inductance, allows current to rise quickly during rapid acceleration. Power enters through a four-lead parallel connection, and the single-stack SIGMAX design concentrates magnetic flux. Class B insulation tolerates temperatures up to 130 °C, withstands 340 VDC, and maintains an insulation resistance of 100 MΩ. A thermal resistance of 3.9 °C/W supports winding temperature calculations under load.
The shaft carries axial thrust loads up to 801 N and withstands radial forces up to 156 N. A NEMA 34 frame bolts directly to compatible NEMA mounting hardware. The permitted operating temperature ranges from -20 °C to +40 °C. Standard lead-wire termination simplifies field wiring, and a BEI encoder mount allows an encoder to be added when closed-loop operation is required. The NEMA mounting arrangement accommodates commonly used couplings, while the double-ended shaft supports flexible machine layouts. The rotor has an inertia of 0.0586 × 10⁻³ kg·m², which supports calculations for acceleration and deceleration profiles.
