Product Description:

The H21NRFB-LNN-NS-00 is a hybrid stepper motor produced by Kollmorgen within the H Hybrid Motors series. In automated assembly equipment, process dispensers, and light transport mechanisms, this motor converts timed current pulses from a drive into precise incremental rotation, which reduces the need for closed-loop feedback in many positioning tasks. Its compact envelope and compatibility with common mounting brackets make it a practical choice for machinery that requires deterministic motion without the added complexity of servo feedback.

Its mechanical profile follows the NEMA 23 frame size, giving it a mounting face that matches many compact drive assemblies. A circular housing diameter of 2.25 in further shapes the motor envelope and aligns with couplings sized for similar stepper formats. Motion is generated in discrete increments, and each full step covers 1.8 degrees, so a complete rotation is delivered in 200 equal steps. Positional repeatability is maintained within ±1.5%, which is suitable for small indexing devices that cannot tolerate significant cumulative error. One rotor-stator stack is used, and the laminated core reduces eddy-current losses while improving detent torque during fine microstepping.

Electrically, the stator insulation is rated for 340 Vdc, and the motor has a thermal class of Class B, 130°C. The motor uses a regular leadwire configuration with an 8 lead bundle, which allows series or parallel phase wiring to match available supply current. No internal feedback device is fitted, so position is inferred from commanded steps. Standard construction, a NEMA flange, a smooth shaft, and the absence of a shaft seal simplify installation where the surrounding enclosure already limits contamination. Continuous duty is supported from -20°C to +40°C, covering most controlled factory environments.