An example of this is in a hand drill, where the drive gear is larger than the driven gear. A pillar drill with a rack and pinion arrangement The speed at which a gear or wheel rotates is measured ...
This difference in speed is called the gear ratio. The driven gear has 60 teeth and the drive gear has 15 teeth. Gear ratio = 60 ÷ 15 = 4 For each rotation of the drive gear, the driven gear ...