28BYGH 1.8° two-phase open-loop stepper motor

28BYGH1.8 two-phase open-loop stepper motor produced by Shanghai Siheng Motor Manufacturing Co., المحدودة. It offers 6 نماذج (على سبيل المثال, 28BYGH232-0674) with a standard 1.8° step angle (±0.09° error). Key specs vary by model: rated voltage 2.66–6.2V, rated current 0.67–0.95A, holding torque 0.43–1.2 kg·cm, weight ~110–200g, and motor length 32–51mm. It uses constant current drive (24V) and 2-phase excitation, with Class B insulation, 500V insulation voltage, and 100Ω insulation resistance.

The product also includes torque-speed curves (showing peak/effective torque vs. speed), clear wiring definitions (color-coded: BLK/GREEN for phase A, RED/BLUE for phase B) with 2-phase excitation sequences, and detailed installation dimensions (على سبيل المثال, 4-M2.5 mounting holes, 5mm shaft diameter).