57BYGH1.8 two-phase open-loop stepper motor

This is a 1.8° two-phase open-loop stepper motor from Shanghai Siheng Motor Manufacturing Co., Ltd., offering 8 models (57BYGH241-1004 to 57BYGH2115-4004). Core specs: rated voltage 2.8-6.5V, rated current 1-4A, holding torque 0.6-3.2 kg·cm, weight 450-1750g, motor length 41-115mm. It features Class B insulation, constant current drive (24V), 2-phase excitation, 500V insulation voltage, and 100Ω insulation resistance, with supporting torque-speed curves and installation details.