E21NSHT-LNF-NS-04 Kollmorgen
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The E21NSHT-LNF-NS-04 is a stepper motor from Kollmorgen's E Hybrid Stepper Motors series and has a NEMA 23 frame size with SIGMAX construction. It offers a step angle of 1.8 degrees with 200 steps per revolution, and features a smooth shaft with 4 lead parallel connections. The motor has insulation rated for 340 Vdc and operates within a temperature range of -20°C to +40°C.
Internal Product Review
The E21NSHT-LNF-NS-04 is a Kollmorgen hybrid stepper motor in a NEMA 23 frame with a 1.8-degree step angle. SIGMAX construction and a laminated rotor support smooth low-speed torque delivery and stable motion characteristics. A ±1.5% step accuracy and 200 steps per revolution make the motor a strong choice for precise indexing applications.
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Product Description:
The E21NSHT-LNF-NS-04 hybrid stepper motor is manufactured by Kollmorgen as part of the E Hybrid Stepper Motors series. Designed for open-loop positioning tasks, the motor converts digital pulse trains from an indexer or drive into accurate shaft increments without requiring feedback transducers. SIGMAX magnetic construction concentrates flux in the air gap, while a single laminated rotor stack and a smooth shaft minimize detent ripple. With a standard NEMA mounting style, the unit integrates easily into compact actuators, light conveyor diverters, or benchtop dispensing stations where repeatable incremental motion is required.
The motor body measures 2.25 in in diameter and corresponds to the NEMA 23 frame envelope, so it fits common face-mount brackets and gearheads. Each command pulse advances the rotor by 1.8°, and one complete shaft revolution consists of 200 discrete steps, providing direct mechanical resolution for moderate-precision indexing. Step placement remains within ±1.5 % of the theoretical angle, a tolerance appropriate for many feed-to-length or valve-timing duties. The four-lead winding supports bipolar drive operation and delivers high torque at low speeds when paired with a suitable microstepping drive. Its electrical arrangement allows the drive to regulate phase current while keeping copper temperatures within the insulation system’s operating limits.
The winding insulation is rated as Class B with a 130 °C limit, supporting continuous service within the permitted thermal range. Epoxy impregnation and slot liners withstand a dielectric test voltage of 340 VDC, helping protect the windings from electrical stress. Insulation resistance between the phases and frame is at least 100 megohms, reducing the risk of dielectric failure in humid conditions. The permitted operating temperature extends from -20 °C to +40 °C, making the motor suitable for standard industrial control cabinets and enclosed machinery. Proper current settings and adequate heat dissipation are necessary to prevent the winding temperature from exceeding its allowable limit during sustained low-speed operation.
