103H89222-1631 Sanyo Denki
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The Sanyo Denki 103H89222-1631 is a stepping motor from the StepSyn Stepping Motors series, featuring a 106 mm frame size and a 1.8 degree per step angle. It has a double shaft configuration with a front shaft diameter of 12.7 mm and a rear shaft diameter of 16 mm. This motor has a DC current rating of 12 Amps and weighs 7.5 kg.
Internal Product Review
The 103H89222-1631 is a Sanyo Denki StepSyn stepping motor with a 1.8° step angle and a double-shaft configuration. The 12 A current rating and keyed front shaft make this unit a strong choice for precise positioning and dependable torque transfer.
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Product Description:
The 103H89222-1631 is a two-phase stepping motor manufactured by Sanyo Denki as part of the StepSyn Stepping Motors series. The unit converts square-wave command pulses from a microstep drive into controlled rotary motion, allowing index tables, packaging actuators, and light gantry axes to move to repeatable positions without feedback devices. By incrementing the rotor in fixed electrical steps, it offers a straightforward positioning element for industrial automation assemblies that do not require closed-loop servo performance.
The motor windings are rated for a maximum phase current of 12 A DC, so the selected driver must supply that level without exceeding coil temperature limits. A full step corresponds to 1.8° per step, giving 200 discrete mechanical positions per revolution and enabling direct conversion from pulses to linear travel in belt or screw systems. The square mounting face measures 106.4 mm on each side, and the laminated stack has a length of 163.3 mm. With the rotor and housing assembled, the motor has a mass of 7.5 kg, which affects settling time when the motor is mounted on a moving carriage. The 12.7 mm front shaft is keyed, and the 5 × 5 × 28 mm key transmits torque to pulleys or couplings without slipping.
The shaft extends through the rear, producing a double-shaft configuration. The back end expands to 16 mm in diameter to accept resolvers, handwheels, or dampers, while the 55.524 mm pilot diameter centers the frame in the mating recess. Rotor inertia is 14.6 × 10⁻⁴ kg·m², allowing acceleration limits to be calculated from the available torque. Four through-holes measuring 6.9 mm in diameter secure the motor to a gearbox or adapter plate. These holes have 88.9 mm spacing and help maintain coaxial alignment during installation.
