Product Description:

The H33NRFB-LNN-NS-00 is a hybrid stepper motor produced by Kollmorgen as part of the H Hybrid Motors series. This motor combines permanent-magnet and variable-reluctance technology to generate discrete rotational steps for position control in automation equipment such as indexing tables, labelers, and light machine tools. It is built in a closed-loop-ready format so motion controllers can count steps rather than read analog feedback, simplifying wiring and programming while still delivering precise incremental motion. This approach suits applications that use discrete command pulses instead of continuously variable servo references.

The unit is built on a NEMA 34 frame with a 3.4-inch square mounting face and alignment for standard NEMA brackets. A holding torque of 4.70 N·m lets the motor resist backdriving when power is removed, which is useful in vertical axes. Each electrical pulse rotates the shaft by 1.8 degrees, yielding 200 full steps per revolution and supporting simple microstepping strategies. Internal windings are brought out through an 8 lead connection style, allowing series or parallel coil hookups to match drive voltage and current. The motor sustains ambient operation from -20 °C to +40 °C, and its Class B insulation system tolerates winding temperatures up to 130 °C. Additional attributes include a 5.06-inch overall body length, a 1.25-inch smooth shaft extension, 2.0 °C/W thermal resistance, and 100 MΩ insulation resistance at 500 VDC.

The mechanical ratings support an axial thrust up to 180 lb and a shaft side load of 35 lb, so couplings, pulleys, or thrust collars can be mounted without external bearings in many layouts. A shaft diameter of 0.3750 in follows common inch-series coupler sizes, and the rotor’s 0.025 oz-in-s² inertia balances quick acceleration with step stability. Overall unit mass is 7.6 lb, which helps limit moving load while still damping vibration. With a step accuracy of ±1.5% and a 340 VDC insulation voltage rating, the motor works with medium-voltage microstepping drives while maintaining positional repeatability during long duty cycles.