Gear Ratios Practice Flashcards

A set of vocabulary-style flashcards explaining the fundamental concepts, formulas, and specific examples of gear ratios based on the lecture notes.

Gear (speed) ratio formula

The calculation defined as the $\frac{\text{Number of teeth on driven (follower) gear}}{\text{Number of teeth on driver gear}}$

Driver gear

The gear that initiates the movement and turns the other gear in a meshing pair.

Driven (follower) gear

The gear that is being turned by the driver gear.

1:1 Gear Ratio

The gear ratio produced when two meshing gears both have an equal number of teeth, such as $14$ teeth each.

Gearing down

A gear configuration that results in an increase in torque and a decrease in speed (e.g., a $2:1$ or $3:1$ ratio).

Gearing up

A gear configuration that results in an increase in speed and a decrease in torque (e.g., a $3:4$ ratio).

2:1 Gear Ratio

The result of a $15$ teeth gear turning a $30$ teeth gear, which characterizes gearing down.

3:4 Gear Ratio

The result of a $16$ teeth gear turning a $12$ teeth gear, which characterizes gearing up.

3:1 Gear Ratio

The result of an $8$ teeth gear turning a $24$ teeth gear, which characterizes gearing down.