SH2861-5142 Sanyo Denki
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The Sanyo Denki SH2861-5142 is a 2-phase stepping motor from the F SANMOTION Stepping Motors series with a flange size of 86 mm square and a motor length of 66 mm. It features a step angle of 1.8 degrees and a rated current of 4 Amps per phase. The motor is built to heatproof class B with a maximum winding temperature rise of 80 K and supports a dielectric withstand of 1000 VAC for 1 minute.
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Product Description:
The SH2861-5142 is a hybrid stepping motor built by Sanyo Denki for the F SANMOTION Stepping Motors series. It converts pulse-train commands from a controller into precise incremental motion, making it suitable for indexing tables, semiconductor handlers, and other positioning tasks in industrial automation. This model operates as a two-phase device and draws 4 A per phase, so the drive electronics must provide matched current regulation for both windings. Its two-phase configuration supports controlled stepping and stable holding torque when the shaft is stationary.
Each full step rotates the shaft by 1.8°, providing 200 discrete positions per revolution before microstepping interpolation is applied. Electrical insulation is verified by a withstand voltage of 1000 VAC for one minute, while a minimum insulation resistance of 100 MΩ at 500 VDC protects against leakage paths that could interfere with nearby encoder or sensor lines. The stator winding uses Class B insulation rated to +130 °C, and the temperature rise is limited to a maximum of 80 K under rated load. These thermal limits support operation without a dedicated motor fan when the surrounding installation provides adequate heat dissipation. The motor’s inductive characteristics provide predictable torque across its operating speed range and help maintain accurate shaft position during dwell periods.
The overall stack depth measures 66 mm, keeping the motor compact enough for side-by-side mounting on 100 mm centers. The square face flange measures 86 mm on each side and maintains mounting squareness within 0.15 mm, helping align the motor with linear guides and driven equipment. Static positioning accuracy has a maximum error of ±0.09°, while pilot concentricity is held within 0.075 mm to center attached couplings accurately. Radial shaft play is limited to 0.025 mm, and thrust shaft play is capped at 0.075 mm. Shaft runout is also limited to 0.025 mm, reducing cyclic load variation on precision bearings and connected mechanical components.
