103H7123-0140 Sanyo Denki
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The Sanyo Denki 103H7123-0140 is part of the StepSyn Stepping Motors series and features a 56 mm square frame size with a holding torque of 0.83 Newton meters. This 2-phase motor has a step angle of 1.8 degrees, measures 63.8 mm in length, and has a rated current of 1 Amp per phase. The shaft diameter is 6.35 mm and the motor weighs 0.65 kilograms.
Internal Product Review
The 103H7123-0140 is a Sanyo Denki StepSyn stepping motor with a 2-phase configuration and a 1.8° step angle. Rated at 1 A/phase, the motor delivers 0.83 N·m holding torque for precise positioning and steady load retention. Rotor inertia of 2.1e-5 kg·m² supports crisp indexing and makes the motor a strong choice for accurate motion control.
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Product Description:
The 103H7123-0140 is a hybrid stepping motor produced by Sanyo Denki within the StepSyn Stepping Motors series. Designed for positioning tasks in pick-and-place gantries, indexing tables, and small conveyors, the unit converts pulse commands from a driver into precise angular motion. Its electromagnetic design supports open-loop control strategies commonly used in automated equipment, while the square frame and standard NEMA-compatible mounting facilitate installation in packaging, semiconductor, and laboratory equipment. It pairs with microstepping drives that accept TTL or differential pulse streams.
Two stator phases draw a maximum current of 1 A per phase, allowing modest power supplies to energize the windings without excessive heat. The copper coils have a resistance of 6.7 Ω per phase and an inductance of 15 mH per phase; these values affect current rise time and midrange torque. Each full step advances the shaft by 1.8°, providing 200 discrete positions per revolution and simplifying pulse-per-unit scaling in motion controllers. When both phases are energized, the motor provides a holding torque of 0.83 N·m, preventing drift at standstill without a mechanical brake.
The motor has an industry-standard 56 mm square frame and a lamination stack length of 63.8 mm. Its rotor inertia is 2.1 × 10⁻⁵ kg·m², balancing quick acceleration with mechanical damping during changes in speed. A pilot diameter of 38.1 mm aligns the motor concentrically with the mounting surface. Four M4 screws pass through 4.5 mm holes arranged on a 47.14 mm bolt circle to secure the housing. The output shaft has a diameter of 6.35 mm and extends 15.5 mm beyond the front face. The complete assembly weighs 0.65 kg, keeping the supported mass low when the motor is installed on a moving gantry carriage.
