103H8221-6240 Sanyo Denki
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The Sanyo Denki 103H8221-6240 is a stepping motor in the StepSyn Stepping Motors series, featuring a basic step angle of 1.8 degrees and a holding torque of 2.74 newton-meters. It has a flange size of 86 mm, a motor length of 62 mm, and a mass of 1.5 kilograms. The motor is rated for 6 amps per phase and has an IP43 protection rating.
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Product Description:
The 103H8221-6240 is a Sanyo Denki motor from the StepSyn Stepping Motors series. In automated pick-and-place gantries, indexing tables, and light conveyor zones, the unit advances the load in exact increments by responding to drive pulses, allowing repeatable positioning without an encoder or resolver. Its construction follows the hybrid stepper format commonly used for open-loop motion axes in packaging, semiconductor handling, and test equipment.
A basic step angle of 1.8° provides 200 full steps per shaft revolution. Mounting uses a Φ86 mm square flange, while a pilot diameter of 73.025 mm centers the frame in matching gearheads or brackets. The motor provides a holding torque of up to 2.74 N·m for restraining static loads, and keyway engagement is supported by a 4 × 4 × 25 mm key seated in the output shaft. The housing has a total depth of 62 mm, making the unit suitable for installations with limited axial space. The assembly weighs 1.5 kg, which helps limit the added mass on moving machine axes. Bipolar wiring is provided through four leads, allowing microstepping drives to reverse phase polarity for finer motion increments. The shaft has an integral key for positive engagement with compatible couplings and transmission components. The winding has an inductance of 1.65 mH and a resistance of 0.3 Ω per phase.
The IP43 enclosure rating protects the internal components against solid objects larger than 1 mm and water sprayed at angles up to 60 degrees from vertical. Each phase draws 6 A per phase at rated torque, so the drive must deliver balanced current with minimal ripple. Dynamic response is supported by a rotor inertia of 1.45 × 10⁻⁴ kg·m², allowing quick acceleration without excessive overshoot. A ground steel shaft with a diameter of Φ12 mm transmits motion into couplings while fitting common bearing and pulley bores. The bipolar coil arrangement, low phase resistance, and keyed output support direct integration with gearheads or belt stages that require consistent start-and-stop accuracy.
