E21NRFT-LDF-M1-00 Kollmorgen
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The Kollmorgen E21NRFT-LDF-M1-00 is part of the E Hybrid Stepper Motors series and features a NEMA 23 frame size with eight lead connections, designed for maximum torque at low speed. It uses SIGMAX construction, has a step angle of 1.8 degrees for 200 steps per revolution, and supports a regular leadwire connection style. The motor operates within a temperature range of -20°C to +40°C and is rated for Class B insulation at 130°C.
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Product Description:
The E21NRFT-LDF-M1-00 is a hybrid stepper motor produced by Kollmorgen for the E Hybrid Stepper Motors series. As a two-phase positioning device, it converts discrete drive pulses into controlled shaft rotation so that indexers, pick-and-place modules, and light gantry axes can achieve repeatable incremental moves in industrial automation. The motor fits a NEMA 23 frame and uses the corresponding NEMA mounting bolt pattern for installation in standard brackets. Its compact frame is suitable for machinery that requires precise motion without the size of a larger servo system.
Motion granularity is established by a 1.8-degree step angle, which yields 200 steps per revolution and reduces the need for mechanical gear reduction. Each move stays within a tolerance of ± 1.5 %, supporting open-loop applications that still require positional consistency. An eight-lead wiring scheme allows unipolar or bipolar drive modes, and the regular lead-wire connection style simplifies field termination. Internal windings are optimized for maximum torque at low speed, allowing the axis to start and stop under load without a gearbox. A single-stack rotor reduces axial length while preserving torque density. The insulation system provides 100 megohms of resistance to limit leakage current between the phases and the frame.
Kollmorgen applies SIGMAX construction, which concentrates magnetic flux in the rotor teeth and raises torque per ampere without increasing the motor size. Thermal durability is supported by a Class B, 130 °C winding system, while a dielectric withstand rating of 340 VDC protects against drive overvoltage events. The motor operates in ambient temperatures from −20 °C to +40 °C, making it suitable for unheated warehouse cells and climate-controlled equipment racks. A NEMA mounting face supports accurate alignment with couplings. Eight flexible leads exit the housing through a molded grommet that protects the wiring at the entry point. The grommet also helps prevent repeated cable movement from placing excessive strain on the internal winding connections.
