E31NCHT-LEN-PD-01 Kollmorgen
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The Kollmorgen E31NCHT-LEN-PD-01 is a hybrid stepper motor from the E Hybrid Stepper Motors series with a NEMA 34 frame size and SIGMAX construction. It features a holding torque of 337 oz-in, operates with an encoder resolution of 500 LPR, and supports 5.4 amps rated current per phase. The motor includes a system MS connector, 4 lead parallel connections, and is rated for insulation class B at 130°C.
Internal Product Review
The E31NCHT-LEN-PD-01 is a Kollmorgen hybrid stepper motor with a NEMA 34 frame and 337 oz-in holding torque. A 1.8-degree step angle and 500 LPR encoder resolution support accurate indexing and dependable feedback in motion systems. System MS connector integration adds practical installation value, and the max-torque-at-low-speed winding makes the motor a strong choice for demanding positioning duty.
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Product Description:
The E31NCHT-LEN-PD-01 hybrid stepper motor is produced by Kollmorgen within the E Hybrid Stepper Motors series. Designed for incremental positioning and velocity control in pick-and-place stations, indexing tables, and gantries, the unit converts digital step commands into precise shaft movement through its two-phase SIGMAX magnetic construction. An integrated optical encoder provides position feedback to a microstep drive, allowing closed-loop corrections when load, inertia, or friction disturbs the commanded motion.
The feedback device provides 500 LPR incremental pulses per revolution. When decoded in quadrature, the drive receives 2,000 counts per revolution, providing greater position resolution than the native 200 steps generated by the 1.8° rotor geometry. The motor develops 337 oz-in (2.38 Nm) of holding torque, allowing direct coupling to moderate-inertia loads without gear reduction. Each full step covers 1.8 degrees, while microstepping reduces this increment for smoother motion. Electrical excitation is rated at 5.4 A per phase, and the copper windings have an inductance of 2.5 mH. These electrical values affect current rise time and the voltage needed for high-speed operation. The motor can accept a pulse train of up to 100 kHz, enabling rapid acceleration profiles commanded by motion controllers.
The frame follows the NEMA 34 footprint with a 3.875-inch bolt circle and 0.218-inch mounting holes, allowing installation on standard indexers and gearheads. The 3.38-inch outside diameter keeps the stator cross section compact, while the 0.0083 oz-in-s² rotor inertia supports quick start-and-stop motion in the single-stack motor. The operating temperature range is -20 °C to +40 °C, and the thermal resistance is 3.9 °C/W. These thermal properties help keep the coil temperature below the Class B, 130 °C insulation threshold when the unit is mounted on a metal plate. The insulation resistance is 100 MΩ, and the system withstands a 340 VDC hipot test to protect against leakage current in high-humidity environments. A differential line-driver encoder with dual-channel quadrature and an index signal supports noise-resistant wiring through the System MS connector and four-lead parallel windings.
