E33NRHA-LN-NS-00 Kollmorgen
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The Kollmorgen E33NRHA-LN-NS-00 is part of the E Hybrid Stepper Motors series and features a NEMA 34 frame size with SIGMAX construction. It provides a holding torque of 940 oz-in and operates with a rated current per phase of 8.6 Amps. The motor has a maximum length of 5.06 inches and weighs 7.6 pounds.
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Product Description:
The E33NRHA-LN-NS-00 is a hybrid stepper motor produced by Kollmorgen within the E Hybrid Stepper Motors series. Designed for incremental positioning and speed control in automated machinery, the unit converts digital pulse trains from a microstepping drive into precise mechanical rotation. Its three-stack configuration and SIGMAX magnetic construction provide the detent and dynamic torque needed for indexing tables, pick-and-place axes, and compact conveyors.
At a fundamental step angle of 1.8 degrees, the rotor advances in 200 discrete steps per revolution, and positioning accuracy remains within ±1.5%. The motor occupies the NEMA 34 frame envelope and measures 5.06 inches in overall length, balancing torque output against enclosure depth. Each of the three parallel windings draws 8.6 A. Its 0.23 Ω phase resistance controls copper loss, while the 2.3 mH inductance moderates the rate of current change during microstepping. A static torque of 940 oz-in allows the shaft to hold position against sizable process loads without external gearing. Rotor inertia is 0.025 oz-in-s², supporting responsive acceleration, while a thermal resistance of 2.0 °C/W allows internal heat to flow to the housing and mounting plate.
The winding system uses Class B insulation rated to 130 °C, with an insulation resistance of 100 megohms and a test voltage of 340 VDC to protect against dielectric breakdown during extended duty cycles. The motor operates in ambient temperatures from -20 °C to +40 °C, which suits many industrial installations. Heat is transferred through the NEMA mounting face, which has a 3.875-inch bolt circle, 0.218-inch mounting holes, and a 2.875-inch pilot. The single shaft supports an axial load of 180 lb, while the complete motor weighs 7.6 lb, helping limit structural mass on moving axes. Standard lead-wire termination and four parallel leads simplify electrical connections. SIGMAX laminations and the three-stack core maintain magnetic flux density when the motor is installed on a standard NEMA bracket.
