Product Description:

The H21NREC-LNN-NS-00 hybrid stepper motor is produced by Kollmorgen within the H Hybrid Motors series. This two-phase device is used in pick-and-place actuators, small conveyors, and metering pumps, where it converts pulse sequences from a drive into incremental shaft movement. By using permanent-magnet and variable-reluctance laminations, the motor generates discrete steps that hold position when pulses stop, eliminating the need for an integrated feedback sensor.

The motor uses a NEMA 23 frame, which offers mounting holes on a 47 mm square bolt circle for easy installation in existing stages. It produces 59 oz-in (0.42 Nm) of static holding torque, which is sufficient to maintain load alignment when power is applied but motion is idle. Each phase is energized at 4.1 A, and the copper windings present 0.35 Ω of resistance, giving predictable I²R heating that the drive must accommodate. Dynamic response is influenced by a winding inductance of 0.60 mH, allowing current to rise quickly so torque develops promptly during acceleration. A regular lead-wire connection with six leads supports series or parallel wiring to match supply voltage, and the single-stack construction minimizes detent ripple.

The motor uses a Class B, 130 °C insulation system and operates in ambient conditions from -20 °C to +40 °C; within this range, it maintains ±1.5% step accuracy without forced cooling. The rotor advances in increments of 1.8 degrees, producing 200 full steps per revolution so motion controllers can achieve straightforward metric or imperial travel conversions. A smooth, single-ended shaft simplifies coupler attachment, and the insulation resistance of 100 MΩ at 340 Vdc testing helps guard against leakage in high-humidity cabinets. The lack of internal feedback reduces wiring complexity, yet the six-lead design still supports half-coil operation when lower power dissipation is required.