Product Description:

The E31NRFB-LNN-NS-00 is a hybrid stepper motor manufactured by Kollmorgen within the E Hybrid Stepper Motors series. As a two-phase stepping unit, it advances in fixed angular increments, making it suitable for indexing tables, pick-and-place heads, and other automation axes that need repeatable open-loop positioning without external feedback devices. A single rotor stack limits detent torque and inertia, while the smooth shaft eliminates keyway stress points.

With a NEMA 34 frame, the motor bolts to standard 3.4-inch square flanges found on many machine frames. Its SIGMAX construction concentrates flux to increase output, giving a holding torque of 316 oz-in (2.23 Nm) when the windings are energized. Each command pulse produces a 1.8-degree increment, and parallel wiring draws a rated phase current of 5.9 A through a phase resistance of 0.24 Ω. Series connection is also possible, dropping the phase current to 3.0 A and raising resistance to 0.94 Ω, while corresponding inductances are 1.7 mH in parallel and 6.9 mH in series. Eight lead wires and a regular lead-wire connection style allow either wiring scheme. The NEMA mounting style simplifies coupling to belts, pulleys, or couplings, while the 100 MΩ insulation resistance and 340 Vdc insulation voltage rating isolate the windings from grounded metal parts.

The package measures 2.58 in long and operates in ambient ranges from -20 °C to +40 °C. Class-B insulation rated to 130 °C handles winding heat, aided by a thermal resistance of 3.9 °C/W. The motor completes one revolution in 200 full steps, and step accuracy remains within ±1.5%, providing predictable linear motion when paired with lead screws. Mounting hardware stays electrically isolated because of the high insulation resistance. The 340 Vdc insulation rating supports use with high-bus-voltage micro-stepping drives.