E31NRFT-LNF-NS-00 Kollmorgen
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The Kollmorgen E31NRFT-LNF-NS-00 is a stepper motor from the E Hybrid Stepper Motors series, featuring a NEMA 34 frame size and SIGMAX construction. It provides 200 steps per revolution with a step angle of 1.8 degrees and a step accuracy of plus or minus 1.5 percent. The motor comes with an eight-lead regular leadwire connection, smooth shaft, and supports both unipolar and bipolar phases.
Internal Product Review
E31NRFT-LNF-NS-00 is a Kollmorgen E Hybrid Stepper Motor with a NEMA 34 frame and a 1.8-degree step angle. SIGMAX construction and 200 steps per revolution support smooth indexing and dependable low-speed torque delivery. A strong choice for motion systems requiring flexible unipolar and bipolar operation.
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Product Description:
The E31NRFT-LNF-NS-00 is a hybrid stepper motor produced by Kollmorgen for the E Hybrid Stepper Motors series. It combines permanent-magnet and variable-reluctance principles to generate incremental motion that corresponds directly to incoming command pulses. By providing discrete shaft positions without a feedback device, the motor serves indexing tables, conveyor diverters, and compact actuators where repeatable positioning and low maintenance are required in automated equipment. Its compact body makes it easier to install on small packaging frames with limited space.
Each electrical step advances the rotor by 1.8 degrees, and the shaft completes one revolution after 200 pulses. Positional error remains within ±1.5 %, providing suitable accuracy for pick-and-place or fluid-metering applications. Eight flying leads allow the coils to be wired for series or parallel operation, so the motor supports unipolar and bipolar drive modes and works with a wide range of drivers. Class B insulation is rated for 130 °C, while an insulation resistance of 100 megohms and a dielectric strength of 340 VDC protect the windings from thermal and electrical stress. SIGMAX magnet geometry and a single stator stack support the maximum-torque-at-low-speed winding, which provides high holding torque at typical step rates.
The mechanical envelope follows the NEMA 34 frame standard and includes a 2.875-inch pilot that mates with common mounting brackets. The housing has a length of 2.58 inches, allowing the motor to fit inside shallow enclosures. The 0.3750-inch smooth shaft projects 1.25 inches from the housing and provides sufficient engagement for compatible couplings. Standard lead-wire connections simplify cable routing inside compact machinery. Continuous operation is permitted within an ambient temperature range of -20 °C to +40 °C, covering common factory operating conditions. The low axial mass supports rapid acceleration in applications that require frequent starts, stops, or directional changes.
