Product Description:

The 103H8222-5141 is a hybrid stepper motor produced by Sanyo Denki in the StepSyn Stepping Motors series. This two-phase bipolar unit converts digital pulse trains from an indexer or PLC into precise incremental motion for pick-and-place assemblies, small conveyors, and metering pumps. By advancing the rotor in fixed increments, it provides open-loop position control without requiring an encoder in many industrial automation platforms.

The motor occupies a square frame whose outer stator circle measures 85.85 mm in diameter and extends 92.2 mm along the shaft axis. The 73.025 mm pilot centers the housing, while 5.35 mm mounting holes on a 69.6 mm pitch align with common NEMA 34 brackets. A 12 mm output shaft transmits torque through keyed or clamped couplings. The total mass is 2.5 kg, providing thermal capacity for demanding duty cycles. The two-phase winding provides a fundamental resolution of 1.8° per step, which produces 200 discrete positions per revolution. AWG 18 lead wires simplify connection to drives rated for industrial current levels and permit routing through standard cable carriers inside machinery.

The motor provides a holding torque of 5.09 N·m, allowing the shaft to resist load disturbances when the phases are energized. Each phase draws 4 A per phase at standstill, while the low resistance of 0.7 Ω per phase supports rapid current rise and strong holding force. Magnetic energy is stored through an inductance of 5.7 mH per phase, so current decay remains moderate and supports smooth microstepping operation. The rotor inertia of 2.9 × 10⁻⁴ kg·m² enables quick indexing moves without excessive overshoot while helping damp resonance at midrange speeds. These electrical characteristics support operation with modern chopper drives, which regulate phase current during acceleration, deceleration, and stationary holding. Proper drive settings help maintain consistent incremental movement across repetitive positioning cycles and varying mechanical loads.