Stepping accuracy...5% Temperature rise...80 Max Ambient temperature...-20 C-+ 50 C Insulation resistance...100Mohm Min 500VDC Dielectric strength...500V AC 1minute Models Brief Specifications BSHB397-H step angle: 1.2deg length: 69mm current: 1.75A holding torque: 2N.m Power supply: 110VAC 2A Net weight: 2Kg BSHB397 step angle: 1.2deg length: 69mm current: 5.8A holding torque: 2N.m Power supply: 40VDC 5A Net weight: 2Kg BSHB3910-H step angle: 1.2deg length: 97mm current: 2A holding torque: 4N.m Power supply: 110VAC 2.5A Net weight: 3Kg BSHB3910 step angle: 1.2deg length: 97mm current: 5.8A holding torque: 4N.m Power supply: 40VDC 5A Net weight: 3Kg BSHB3913-H step angle: 1.2deg length: 125mm current: 2.25A holding torque: 6N.m Power supply: 110VAC 2.5A Net weight: 4Kg BSHB3913 step angle: 1.2deg length: 125mm current: 5.8A holding torque: 6N.m Power supply: 40VDC 5A Net weight: 4Kg www.bsjd.com for more types of micro stepping motor in details. bs@ bsjd.com for price inquiry. ( Rachel Lin)