103H89222-0941 Sanyo Denki
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The Sanyo Denki 103H89222-0941 is a stepping motor from the StepSyn Stepping Motors series with a holding torque of 10.8 newton-meters and a basic step angle of 1.8 degrees. This model features a flange size of 106 mm, motor length of 163.3 mm, and a single output shaft with key. The motor operates at 4 amps per phase and weighs 7.5 kilograms.
Internal Product Review
The 103H89222-0941 is a Sanyo Denki StepSyn stepping motor with a 1.8° basic step angle and 10.8 N·m holding torque. Unipolar wiring and a 4 A/phase rated current support straightforward drive matching and stable torque production. A single-shaft keyed output makes this unit an excellent choice for indexed motion systems.
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Product Description:
The 103H89222-0941 is a hybrid stepping motor manufactured by Sanyo Denki within the StepSyn Stepping Motors series. The unit translates pulse trains from a dedicated driver into incremental rotary motion, enabling open-loop positioning of indexing tables, metering pumps, and transfer mechanisms in industrial automation. Because stepping motors develop holding torque without an encoder loop, they reduce system complexity wherever repeatable movements are required. A keyed output shaft and single-shaft configuration permit direct coupling to lead screws or belt pulleys without clutches.
The motor advances 1.8° per full step, producing 200 discrete positions per revolution and allowing straightforward conversion between pulse count and linear travel on screw-driven axes. When energized, it sustains a holding torque of 10.8 N·m, so fixtures remain locked against external disturbances until the drive releases current. Each winding draws 4 A per phase, meaning the power supply must deliver sufficient current while also dissipating heat created by copper losses. The motor has a phase resistance of 0.98 Ω per phase, which affects the initial current rise and steady-state thermal profile. Dynamic response is influenced by a rotor inertia of 14.6 × 10⁻⁴ kg·m²; this value moderates acceleration while still allowing rapid indexing when the motor is paired with properly tuned microstepping sequences.
A face-mounted flange with a diameter of 106 mm matches common NEMA 42 bolt patterns, while a concentric 55.524 mm pilot seats the motor accurately against gearbox input faces. The assembly weighs 7.5 kg, so vertical installations may require additional support to limit stress on the mounting surface. The bearings tolerate up to 350 N of radial load from pulleys and up to 100 N of axial load from couplings, supporting operation in tensioned-belt and thrust-screw applications. The 163.3 mm housing encloses windings with an inductance of 6.3 mH per phase for unipolar wiring, and the 12.7 mm keyed shaft transfers torque directly to driven components without backlash.
