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E21NRFT-JDN-NS-00 by Kollmorgen

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The E21NRFT-JDN-NS-00 motor from Kollmorgen is a member of the E Hybrid Stepper Motors series, designed to deliver high-precision motion control in industrial automation environments. This hybrid stepper motor features a Frame Size of NEMA 23 (2.25 in. dia.) and a Current Rating of 2.8 amps DC, providing a robust foundation for a variety of control systems. With 200 Full Steps Per Revolution and a Step accuracy of ±1.5%, the E21NRFT-JDN-NS-00 ensures repeatable positioning and smooth transitions. Its Torque Range of 0.54–0.77 Nm (77–108 ounce-inches) enables the generation of substantial holding and dynamic torque, even at lower speed ranges. The motor’s Construction/connection type is Regular/leadwire, with 8 lead connections in total, supporting flexible wiring configurations for diverse system layouts.

Performance characteristics of the E21NRFT-JDN-NS-00 emphasize synchronized operation and efficient torque delivery across its speed range. The Winding type is optimized for maximum torque at low speed, ensuring that torque remains stable under variable loads. A single Number of rotors stack configuration contributes to reduced rotor inertia, improving step response for rapid acceleration and deceleration. The NEMA-standard Mounting interface (NEMA, 4 stacks) simplifies mechanical integration and alignment within multi-axis assemblies. Thermal performance is maintained across an Operating temperature window of -20 to +40 °C, enabling deployment in both controlled factory settings and more demanding ambient conditions. The motor’s eight individual connections also allow for alternative wiring schemes, including series or parallel configurations, to tailor current and voltage parameters to specific drive electronics.

Reliability and integration are fundamental to the E21NRFT-JDN-NS-00 design, with class B insulation materials capable of withstanding temperatures up to 130 °C and an insulation voltage rating of 340 VDC, as noted in the product documentation. Although this model does not include encoder options, its inherent positional accuracy and step stability make it ideal for open-loop control tasks. The compact NEMA 23 form factor and standardized mounting provisions facilitate seamless retrofits into existing equipment. Typical applications span industrial automation sectors such as pick-and-place indexing, labeling machines, packaging systems, and general-purpose motion platforms. By leveraging Kollmorgen’s proven hybrid stepper technology, system integrators can achieve dependable, long-term performance in demanding industrial environments.

Technical Specifications

Construction/connection type
Regular/leadwire
Current Rating
2.8 amps DC
Frame Size
NEMA 23 (2.25 in. dia.)
Full step per revolution
200
Mounting
NEMA(n/a 4 stacks)
Number of connections
8 lead
Number of rotors stack
1
Operating temperature
-20 to +40 C
Step accuracy
+/- 1.5%
Torque Range
77-108 ounce-inches or 0.54-0.77 Nm
Winding type
Maximum torque at low speed

Click here for product datasheet

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