Tangent Key

A Tangent Key is a mechanical component used to lock parts, such as gears or pulleys, onto a shaft. It is a rectangular piece inserted into slots (keyways) cut into both the shaft and the mating part. Positioned perpendicular to the shaft's radius, the tangent key prevents the parts from rotating relative to each other, ensuring they move together as a unit. This secure connection is crucial for the precise operation of mechanical systems.