Gears

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A small driver turning a large follower, resulting in the follower spinning more slowly than the driver.

Two or more gears that are meshed together are called a...

A large driver turning a small follower, resulting in the follower spinning faster than the driver.

Any gear that is turned by another gear.

Any gear that is turned by an outside force and that also turns at least one other gear.

A safety device used to make sure that a gear can turn in only one direction.

A gear with curved teeth that can be used to change the direction of rotation by 90°.

A gear that is meshed between a driver and a follower and makes them turn the same direction.