Product Description:

The 103H7126-5740 is a two-phase stepping motor manufactured by Sanyo Denki for the StepSyn Stepping Motors series. It executes incremental motion in pick-and-place heads, indexers, and compact gantries by advancing through a fixed angle with every control pulse. A bipolar winding layout and lead-wire termination allow the motor to operate with standard microstep drives and connect to a control cabinet through UL1430-rated conductors. A single D-shaped shaft provides a flat surface for set-screw couplings without requiring a keyway.

The motor advances in discrete increments of 1.8° per step, providing 200 full steps per revolution for straightforward positioning algorithms. The motor has a holding torque of 1.6 N·m, indicating how much rotational force the energized rotor can resist while stationary. Each phase draws 2 A at the rated operating point, so the drive electronics must supply stable current rather than constant voltage. A phase resistance of 2 Ω establishes the voltage needed to reach the rated current under steady-state conditions. The winding inductance is 9.1 mH per phase, and the resulting electrical time constant limits the pulse rates at which full torque can be delivered, especially during rapid acceleration.

A square flange measuring 56 mm on each side matches common NEMA 23 mounting patterns, allowing direct attachment to compatible machine frames. The overall depth is 75.8 mm, allowing the motor to fit inside shallow enclosures while accommodating the magnetic stack needed for its torque output. The rotor and frame together weigh 0.98 kg, which limits the load added to moving assemblies and helps damp resonance. A rotational inertia of 0.36 × 10⁻⁴ kg·m² permits quick speed changes and reduces settling time in high-throughput machinery. Three AWG 22 lead wires exit the housing for connection to the motor drive.