The term 'Wheel of a Rotating Shaft' refers to a CAM, which is a rotating or sliding piece in a mechanical linkage used to transform rotary motion into linear motion. It is typically used to convert circular motion into a reciprocating motion that can be used to open and close valves, move pistons, and other similar tasks. The CAM is usually attached to a shaft that rotates, and the wheel is the part of the CAM that interacts with the other components in the linkage.