Gear ratio refers to the relationship between the number of teeth on two gears that are in mesh. It is an important concept in mechanics and engineering, as it determines the speed and torque output of a gear train.
The gear ratio is calculated by dividing the number of teeth on the driven gear by the number of teeth on the driving gear. A gear ratio greater than 1 indicates that the driven gear will rotate more slowly than the driving gear, while a gear ratio less than 1 indicates that the driven gear will rotate more quickly than the driving gear.