Standard 48 step / 7.5Deg design. Flange mount 3.0mm hardened steel shaft. Specifications: Rated voltage: 12VDC Rated current: 1.1A/phase Phases: 4 Steps per revolution: 48 Stepping angle: 7.5Deg Drive method: Unipolar chopper drive Resistance per winding: 20 ohms Starting frequency: 600pps (max) Holding torque: 700g/cm