Product Description:

The E31NRFT-LDF-NS-00 is a NEMA-style hybrid stepper motor produced by Kollmorgen within the E Hybrid Stepper Motors series. Designed for open-loop positioning in indexers, pick-and-place axes, and small gantries, it uses SIGMAX construction to concentrate magnetic flux and increase low-speed output. The motor fits a NEMA mounting pattern, uses a regular eight-conductor lead-wire arrangement, and includes 12-inch, 22 AWG leads for cabinet routing. A single-stack rotor keeps the overall body length to 2.58 inches and limits the installed mass to 3.2 lb, making the motor suitable for compact machine frames.

The motor uses a NEMA 34 frame with a face dimension compatible with many gearheads and couplings. At standstill, the energized motor produces 2.38 Nm of holding torque for supporting static loads. Each electrical excitation advances the rotor by 1.8 degrees, and a full revolution requires 200 steps while maintaining positioning linearity within ±1.5% for repeatable indexing. The rotor inertia is 0.0083 oz-in-s², allowing rapid acceleration with properly tuned motion profiles. The smooth shaft avoids stress concentrations associated with keyways, and the winding is optimized for maximum torque at low speed to sustain strong detent force during slow movements.

The shaft can tolerate 180 lb of axial force and 35 lb of radial force, accommodating belt tension and screw preload in packaging or laboratory equipment. Internal heat flows through the stator to the housing with a thermal resistance of 3.9 °C/W. The motor uses Class B insulation rated for 130 °C to protect the windings from excessive temperature rise. Its insulation resistance is 100 MΩ, and its dielectric withstand voltage is 340 V DC, supporting operation with microstepping drives on buses up to 160 V. Continuous operation is permitted at ambient temperatures from -20 °C to +40 °C. The eight-lead wiring arrangement supports full-coil and half-coil configurations without additional connectors or adapters.