Product Description:

The SH5281-7211 is a two-phase stepping motor produced by Sanyo Denki for the F SANMOTION Stepping Motors series. Designed for positioning duties in pick-and-place heads, miniature stages, and small conveyors, the motor advances the shaft in discrete increments so controllers can translate pulse counts directly into travel distances. It implements the New Pentagon connection method, providing a simple way to wire the coils for either unipolar or bipolar excitation without changing the motor hardware. The device provides predictable angular resolution while allowing the use of compact driver circuitry.

Its basic angular resolution is 0.72°, meaning one full revolution requires 500 steps. The shaft can resist back-driving forces with up to 0.041 N·m of holding torque when the windings are energized, which supports static load retention at rest. The phase windings draw a continuous 0.75 A per phase, so compatible low-power microstep drives can operate the motor without additional heat sinks. Overall depth is limited to 32 mm, allowing installation in shallow instrument panels. The enclosure carries an IP40 rating, providing protection against solid objects larger than 1 mm but no protection against water. A rotor inertia of 0.01 × 10⁻⁴ kg·m² supports rapid acceleration, and a 22 mm pilot diameter centers the frame against mating brackets.

The square frame measures 28 mm on each side, and its impact resistance of 490 m/s² helps the motor withstand shocks during transport or machine operation. Axial loads may apply up to 3 N of thrust before bearing damage may occur. The shaft has a diameter of 5 mm for connection to compatible couplings and driven components. The tapped mounting holes use M2.5 × 0.45 threads for direct attachment to aluminum plates. A shaft runout tolerance of 0.025 mm maintains concentric rotation and helps limit vibration at the connected load. The motor has a mass of 0.11 kg, supporting favorable payload-to-inertia ratios in lightweight positioning stages.