The Single Gear
The Gear Train
Gears work in teams. Two gears working together is called a gear train. The gear on the train to which the force is first applied is called the driver. The final gear on the train to which the force is first applied is called the driven gear. Any gears between the driver and the driven gears are called the idlers.
The diagram below shows five meshed gears. The first gear that the force is applied is called the driver gear. Notice that the arrows show how the gears are turning. Every other gear is turning clockwise. The very last gear is the driven gear. All of the gears inbetween are called idlers.
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