103H7126-5010 Sanyo Denki
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The Sanyo Denki 103H7126-5010 is a bipolar stepping motor from the StepSyn Stepping Motors series. It has a holding torque of 1.27 Newton meters and a rated current of 2 Amps per phase. The motor features a 1.8 degree step angle and weighs 0.98 kilograms.
Internal Product Review
The 103H7126-5010 is a Sanyo Denki StepSyn stepping motor with a 1.8° step angle and bipolar winding. Rated at 2 A/phase with 1.27 N·m holding torque, the unit offers strong position control and dependable low-speed performance. A very capable motor for indexing applications that benefit from accurate motion and stable torque output.
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Product Description:
The 103H7126-5010 is manufactured by Sanyo Denki for the StepSyn Stepping Motors series. It converts pulse trains from a driver into controlled angular motion suitable for pick-and-place axes, indexing tables, and other positioning stages in industrial automation. The unit employs a bipolar winding arrangement, allowing bidirectional current control from common microstepping drivers. Selecting a driver that matches the motor’s electrical profile supports repeatable motion without encoder feedback, and the NEMA 23 frame dimensions allow direct installation on compact mechanical assemblies.
The motor has a body width of 56 ±0.5 mm, so it aligns with NEMA 23 brackets while leaving space for couplings. It develops 1.27 N·m of holding torque when both phases are energized, keeping loads stationary as long as drive current is present. Current demand reaches 2 A/phase, which the stepper driver must supply to attain the rated torque. Each full step advances the shaft by 1.8°/step, giving 200 discrete positions per revolution and enabling finer resolution through microstepping. Copper resistance is 1.05 Ω/phase, establishing the voltage that the driver must deliver to reach the commanded current quickly.
The motor weighs 0.98 kg, so mounting structures must support nearly one kilogram of static mass plus the dynamic forces generated during acceleration. A phase inductance of 4.5 mH/phase limits the rate at which current can change, influencing maximum pulse frequency and high-speed torque. Rotor inertia is 0.36 × 10⁻⁴ kg·m², providing moderate resistance to speed changes and balancing quick response with minimal overshoot. Mechanical coupling is handled through a shaft diameter of 6.35 mm, allowing standard 1/4-inch-bore pulleys or rigid couplers to fit without additional machining. The shaft dimensions also simplify alignment with commonly available motion components used in compact positioning assemblies.
