Product Description:

The 103H7823-1740 is a hybrid stepping motor produced by Sanyo Denki for the StepSyn Stepping Motors series. Designed for open-loop or microstepping motion stages, the unit converts pulse commands from a drive into accurately indexed shaft rotation. In industrial automation, it positions tooling, carriers, or sensors without the need for an external feedback device, relying on its fixed electromechanical step sequence to maintain repeatable angular increments.

Its electrical profile is centered on a step angle of 1.8°, giving 200 full steps per revolution for moderate-resolution indexing. A holding torque of 2.7 N·m keeps loads stationary when current is maintained, preventing back-driving in belt or lead-screw mechanisms. The stator windings draw up to 4 A/phase, and the bipolar winding layout permits simple H-bridge control. Internal copper has a phase resistance of 0.65 Ω/phase, which determines the drive voltage required for nominal operation, while a phase inductance of 2.4 mH/phase sets the rate at which current builds during high-speed step sequences. This resistance-inductance combination establishes the electrical time constant and influences detent vibration when the motor is microstepped.

The motor uses a square frame with a 60 mm flange and an overall body length of 85.8 mm, resulting in a compact package with a mass of 1.34 kg that can be panel-mounted without external supports. Four through-holes with a diameter of 4.5 mm are positioned on a 50 mm pitch for direct attachment to standard NEMA 24 adapters, and a 36 mm pilot centers the housing on the mating surface. The rotor has an inertia of 0.84 × 10⁻⁴ kg·m², enabling quick acceleration when coupled to a load with moderate inertia. A single output shaft measuring 8 mm in diameter and 20.6 mm in length transfers motion to pulleys or couplings. The single-shaft configuration also simplifies alignment if an encoder is installed later.