Machine parts are essential components of any machine, and they come in a variety of shapes and sizes. CAMS, COGS, Gears, Rotors, and Ballbearings are all examples of machine parts. CAMS are curved pieces of metal that are used to control the motion of other parts. COGS are toothed wheels that are used to transmit rotary motion from one shaft to another. Gears are toothed wheels that are used to change the speed or direction of a rotating shaft. Rotors are rotating parts of a machine that are used to convert energy into motion. Finally, Ballbearings are small metal balls that are used to reduce friction between two moving parts.