103H8221-6241 Sanyo Denki
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The Sanyo Denki 103H8221-6241 is a 2-phase stepper motor from the StepSyn Stepping Motors series with a frame size of 86 mm and a holding torque of 2.74 Newton-meters. It operates at a rated current of 6 Amps per phase, with a step angle of 1.8 degrees and a rotor inertia of 1.45 x10^-4 kg·m². The motor features IP43 protection grade and weighs 1.5 kilograms.
Internal Product Review
The 103H8221-6241 is a Sanyo Denki 2-phase stepper motor with a 1.8° step angle. A 2.74 N·m holding torque and bipolar winding give the motor confident low-speed performance and clean phase control. IP43 protection and S1 operating mode make the unit a strong choice for dependable continuous-duty motion applications.
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Product Description:
The 103H8221-6241 is a two-phase stepping motor produced by Sanyo Denki within the StepSyn Stepping Motors series. It is intended for open-loop positioning in machine tools, pick-and-place heads, and indexing tables, transforming discrete pulse commands into precise angular motion without feedback devices. The S1 continuous-duty classification allows the motor to run under a constant load in automated equipment where repeatable incremental rotation is required.
The motor develops a holding torque of 2.74 N·m, providing static shaft retention when the windings are energized. A circular housing with a diameter of 86 mm establishes the frame size, matching NEMA 34 patterns for direct coupling to gearboxes. Each phase can be supplied with up to 6 A of rated current, so the drive must deliver this continuous output to obtain full torque across the speed range. The motor has a 1.8° step angle, which yields 200 full-step positions per revolution and supports straightforward microstepping multiplication. Rotor inertia is 1.45 × 10⁻⁴ kg·m²; this moderate inertia balances quick acceleration with stable detent behavior during stop-start cycles.
Phase inductance measures 1.65 mH, while phase resistance is 0.3 Ω; together, these values permit a rapid current rise when the motor is driven by a bipolar constant-current amplifier. The motor enclosure carries an IP43 protection grade, providing protection against solid objects larger than 1 mm and water sprayed at an angle of up to 60 degrees from vertical. It can operate at ambient temperatures from -10 to +50 °C without derating, aided by a mass of 1.5 kg that helps dissipate heat. The insulation withstands AC 1600 V for one minute and provides a minimum resistance of 100 MΩ. The bipolar winding layout uses the four-lead connections commonly found on microstepping drives.
