SH2861-0441 Sanyo Denki
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The Sanyo Denki SH2861-0441 is a stepping motor from the F SANMOTION Stepping Motors series with a motor size of 86 mm square and a length of 66 mm. It features a basic step angle of 1.8 degrees per step, a holding torque of 2.5 Newton-meters, and a rated current of 2 Amps per phase. The motor is unipolar with a winding inductance of 8.0 mH per phase and weighs 1.75 kilograms.
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Product Description:
The SH2861-0441 is a hybrid stepping motor manufactured by Sanyo Denki within the F SANMOTION Stepping Motors series. It is intended for incremental motion tasks in industrial automation, where each electrical pulse received from a controller turns the shaft by a fixed angle so equipment such as pick-and-place heads or indexing tables can move to predefined positions without complex feedback loops. By pairing with a compatible unipolar driver, the unit provides a compact and repeatable rotary actuator for moderate-torque axes on assembly machines, printers, and small robotics.
Its basic step angle is 1.8°/step; therefore, 200 command pulses complete one mechanical revolution, simplifying microstep scaling for finer resolution when required. The motor can hold a static load of 2.5 N·m when energized, allowing gear-free retention of fixtures or lead screws at standstill. Phase windings draw a nominal 2 A/phase, so drive electronics must supply this current while maintaining thermal limits. With a phase inductance of 8.0 mH/phase, current rise is moderately paced, which helps limit ringing in full-step modes but still permits high-speed acceleration when microstepping. A winding resistance of 2.3 Ω/phase establishes the voltage requirement; multiplying it by the rated current indicates that the driver should furnish roughly 4.6 V per phase for steady operation. The unipolar winding topology separates the coil center taps, enabling simple two-phase excitation patterns and reducing switching losses compared with bipolar arrangements.
The square frame measures 86 mm across, and the stack length is 66 mm, allowing the motor to fit NEMA 34 mounting patterns while keeping cabinet depth short. Rotor inertia of 1.48 × 10⁻⁴ kg·m² balances speed response with load stability, supporting rapid index cycles without excessive overshoot. The complete assembly weighs 1.75 kg, so light gantries or vertical axes can carry it without oversized support structures. Lead wire terminations are provided instead of a connector, allowing the cabling to be routed through flexible conduits or strain-relief glands.
