Gearing Systems

Mechanisms consisting of toothed parts that mesh to transmit the rotational motion of the shafts they are a part of. rack = a piece of equipment, usually made of metal or wooden bars, that is used for holding things or for hanging things on pinion = hold vice versa = sed to say that the opposite of what you have just said is also true steering = the equipment in a vehicle that you use to control the direction it goes in mesh = to fit together or match closely, especially in a way that works well; to make things fit together successfully spur = to make something happen faster or sooner shaft = a metal bar that joins parts of a machine or an engine together, enabling power and movement to be passed from one part to another protrusion = a thing that sticks out from a place or surface axle = a long straight piece of metal that connects a pair of wheels on a vehicle car jack = (don't confuse with carjack) a device for lifting (jacking up) cars and other heavy objects