Product Description:

The 103H8222-5241 is a two-phase stepping motor produced by Sanyo Denki for the StepSyn Stepping Motors series. This model converts digital pulse trains from indexers or motion controllers into precise incremental motion, letting automated machines position loads without closed-loop feedback. By advancing the rotor in fixed increments, the motor delivers open-loop positioning for pick-and-place stations, light machining axes, and inspection equipment.

The motor produces a holding torque of 5.09 N·m, permitting stable static positioning even when transmissions introduce load forces. Each full step rotates the shaft by 1.8° per step, so 200 pulses complete one revolution. The motor uses a phase current of 6 A per phase with a coil resistance of 0.35 Ω per phase, resulting in approximately 2.1 V at rated energization and enabling direct operation from low-voltage bipolar drivers. The winding inductance is 2.7 mH per phase, a value that shapes the electrical time constant and limits the maximum pulse rate before torque decreases. The motor has a bipolar winding layout and two phases. Its AWG22 leads have a minimum length of 305 mm, while the 73.025 mm pilot diameter supports installation with common drivers and 86 mm circular mounting flanges.

A rotor inertia of 2.9 × 10⁻⁴ kg·m² moderates acceleration, helping drives use microstepping profiles that avoid resonance. Despite this inertia, the unit weighs only 2.5 kg, easing installation on moving carriages. The body length of 125.8 mm pairs with an 82.55 mm face width to maintain a compact footprint. The shaft has a diameter of 12 mm and includes a machined flat for secure coupling. The centered pilot and rigid frame help maintain low runout and adequate stiffness during repeated positioning cycles. These physical attributes also support stable mounting when the motor is subjected to changing acceleration and load conditions.