| A | B |
|---|
| gear | Form of wheel and axle |
| Driver | The gear that turns the follower |
| Idler | The gear that connects two gears and makes them turn in the SAME direction |
| Gearing DOWN | Small gear makes a marge gear turn SLOWER |
| Gearing UP | Large gear makes a small gear turn FASTER |
| Follower | Gear turned by the driver |
| Compound gearing | Small and large gears are combined to increase or decrease the speed of rotation |
| Speed | The rate of motion |
| Transfer | To change directions |
| Toothed gear meshes to do this | Transfer direction, force or speed |
