What do you understand by gear ratio? Explain.

Gear ratio shows how the number of teeth on the driving gear (input) relates to the number of teeth on the driven gear (output).

Gear Ratio = Number of driven gear teeth / Number of driving gear teeth

It shows the number of times the output gear turns in relation to the input gear. In a mechanical system, the speed and power depend on the gear ratio.

• If the driven gear has more teeth, it rotates slower but with greater power.
• If the driven gear has fewer teeth, it rotates faster but with less power.