Product Description:

The SM2861-5225 is a two-phase stepping motor manufactured by Sanyo Denki within the F SANMOTION Stepping Motors series. The unit serves as a positioning element in automation equipment, generating controlled rotary motion directly from digital command pulses without requiring feedback. Its hybrid construction and integrated shaft make it suitable for conveyors, small gantries, and metering devices where repeatable incremental travel is required.

This model supplies a holding torque of 3.3 N·m, so the shaft can resist static loads while the winding is energized. Each command pulse advances the rotor by 1.8° per step, permitting 200 discrete positions per revolution and simplifying index calculations. The phases can be driven at a rated current of 6 A per phase. A winding resistance of 0.29 Ω per phase results in modest copper losses and allows rapid current buildup. The electrical time constant is governed by a winding inductance of 1.7 mH per phase, helping the motor accept high step rates without excessive ringing. An 86 mm square frame simplifies mounting to NEMA 34 gearboxes, while a minimum insulation resistance of 100 MΩ supports reliable operation with floating power supplies. The windings tolerate a temperature rise of up to 80 K before derating is required.

The shaft can withstand an axial load of 60 N. The enclosure has an IP43 protection rating, providing protection against solid objects larger than 1 mm and water sprayed at angles of up to 60 degrees from vertical. The laminated rotor has an inertia of 1.48 × 10⁻⁴ kg·m², balancing quick acceleration with stable dwell performance. The motor has a shock resistance of 500 m/s² for 11 ms, and its vibration resistance covers frequencies from 10 to 500 Hz at an amplitude of 1.52 mm and an acceleration of 150 m/s². Dimensional accuracy is supported by a shaft runout of 0.025 mm and thrust play of less than 0.075 mm. Operation is permitted at altitudes of up to 1,000 m without an output correction.