Flanged shaft

A spline shaft is a type of mechanical drive, similar in function to a flat key, semi-circular key, or wedged key, all used for transmitting mechanical torque. It features longitudinal keyways on its outer surface, and the rotating parts mounted on the shaft have corresponding keyways to maintain synchronous rotation with the shaft. Some spline shafts can also slide longitudinally along the shaft, such as gear shift gears in a transmission.