42SI-22DAG

12V 24V 7.5DEG 50OHM MOTOR - permanent magnet (tin-can) stepper motor. This specific line of motors was widely manufactured in Japan during the 1980s and commonly used for precise sub-assembly movements, such as paper feeding and print head positioning in legacy dot-matrix printers (e.g., Commodore, Epson, and Apple printers) and vintage disk drives.Technical Specifications BreakdownManufacturer: Mitsubishi (Japan)Model/Series: 42SI (42mm outer frame diameter)Variant Code: 22DAG (Denotes the specific internal winding arrangement, lead count, and physical shaft/gear configuration).Step Angle: 7.5 Degrees per full step. This splits a full rotation (360°) into exactly 48 steps per revolution.Phase Resistance: 50 Ohms DC winding resistance. This indicates a high-impedance coil designed for low-current, voltage-driven (L/R) control topologies or simple unipolar/bipolar circuit arrays.Mechanical FeaturesMotors in the 42SI series typically feature a cylindrical "tin-can" body with an integrated front mounting flange. The output shaft often comes equipped with a pre-installed brass or steel spur gear designed to interface directly with a printer's carriage drive belt or gear train.Wiring ConfigurationWhile variant suffixes alter wire colors, these Mitsubishi 42SI motors are generally configured as 6-wire unipolar or 4-wire bipolar setups. If your motor has 6 wires, it features two independent coils, each with a center-tap wire to allow easy driving via simple transistor arrays (like a ULN2003 or Darlington pair).