103H6701-0140 Sanyo Denki
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The Sanyo Denki 103H6701-0140 is part of the StepSyn Stepping Motors series and has a flange size of 50 mm with a motor length of 39.8 mm. It features a holding torque of 0.28 N·m, a rated current of 1 ampere per phase, and uses unipolar wiring with a lead wire connection. The motor supports an allowable radial load of 79 newtons and has a mass of 0.35 kilograms.
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Product Description:
The 103H6701-0140 is a two-phase stepping motor manufactured by Sanyo Denki for the StepSyn Stepping Motors series. It translates pulse signals from a controller into fixed angular increments, allowing open-loop positioning in compact automation equipment such as laboratory dispensers, small gantries, and card feeders. The motor has a compact frame and connects to compatible drives through insulated lead wires. This arrangement provides precise incremental rotation without requiring closed-loop feedback.
The electromagnetic section delivers a holding torque of 0.28 N·m, so the shaft can maintain its position when current is applied while the motor is stationary. Each command step advances the rotor by 1.8°, providing 200 full-step positions per revolution. The windings draw 1 A per phase at standstill, and the drive regulates this current to manage thermal loading. Copper resistance is rated at 4.3 Ω per phase, which affects the voltage required to reach the rated current. Coil inductance is 6.8 mH per phase, influencing phase-current rise time and the attainable pulse rate. The rotor inertia is 0.057 × 10⁻⁴ kg·m², balancing acceleration capability with damping, while the unipolar winding topology simplifies the drive electronics.
The motor has a 50 mm square flange that aligns with standard motor mounts and a body length of 39.8 mm, keeping the required installation depth modest. Its radial bearings support up to 79 N of side load. The permitted thrust load is 15 N, helping prevent premature bearing wear in belt- or gear-driven layouts. A single round output shaft supports rigid coupling to the driven mechanism. The motor has an overall mass of 0.35 kg, making it suitable for moving-slider assemblies while providing enough mass to help damp resonant vibration. Lead-wire termination also permits the use of customized harness lengths in multi-axis machinery.
