E21NRFT-JDN-NS-00 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen E21NRFT-JDN-NS-00 is part of the E Hybrid Stepper Motors series and features a NEMA 23 frame size with SIGMAX construction. It has a step angle of 1.8 degrees and 200 steps per revolution, with a smooth shaft and 8 lead regular leadwire connections. The motor operates within a temperature range of -20°C to +40°C and is designed with insulation class B rated at 340 VDC.
Internal Product Review
The E21NRFT-JDN-NS-00 is a Kollmorgen E Hybrid Stepper Motor built in a NEMA 23 frame with a low-inertia rotor. A 1.8-degree step angle and ±1.5% step accuracy support clean indexing and dependable positioning in low-speed torque applications. A strong choice for motion systems requiring straightforward integration and consistent stepper performance.
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Product Description:
Kollmorgen manufactures the E21NRFT-JDN-NS-00 in the E Hybrid Stepper Motors series. The motor provides open-loop incremental motion for pick-and-place stations, small gantries, and indexing tables within industrial automation, translating commanded pulse trains into discrete shaft movement without internal feedback. Its hybrid design combines permanent-magnet and variable-reluctance elements to develop holding torque while maintaining fine angular resolution, making it a practical choice for densely packed multi-axis equipment where full servo loops are unnecessary.
Mechanical dimensions align with NEMA 23 mounts, and the round frame measures 2.25 in across, allowing the motor to fit standard gearboxes and linear stages. Each drive pulse advances the rotor by 1.8 degrees, so a full electrical sequence yields 200 discrete steps per revolution. The low-inertia rotor accelerates quickly, reducing cycle time during short-stroke moves. The motor uses one stator stack, and its windings provide maximum torque at low speeds to match common microstepping drives. Eight leads exit through a standard lead wire harness, and this connection scheme supports parallel or series bipolar wiring for selecting higher-current or higher-voltage performance. A NEMA face flange and a smooth, unsealed shaft simplify direct connection to pulleys or shaft couplings.
The permitted ambient operating temperature ranges from -20 °C to +40 °C. The motor uses Class B insulation rated for 130 °C to keep the windings within their thermal limit. Electrical isolation is supported by an insulation resistance of 100 megohms and a dielectric rating of 340 VDC, providing protection against supply transients. Step placement error remains within ±1.5%, maintaining position accuracy without an encoder. SIGMAX construction increases magnetic flux density within the motor. The lack of feedback devices reduces the number of components required in the motion loop.
