Gears and Gear Ratio

Front

What is a gear ratio?

Back

A gear ratio is calculated by the ratio of the number of teeth on the output gear to the number of teeth on the input gear.

Front

How do you calculate a gear ratio?

Back

Gear Ratio = Teeth of Gear Output : Teeth of Gear Input.

Front

What happens to speed and torque when using gears of different sizes?

Back

Using a smaller drive gear and a larger driven gear will produce more torque and less speed.

Front

What is the gear ratio when two gears are equal in size?

Back

The gear ratio is 1:1.

Front

What is an idler gear?

Back

An idler gear is a gear that transmits motion between two other gears without changing the gear ratio.

Front

If a drive gear has 10 teeth and a driven gear has 35 teeth, what is the gear ratio?

Back

The gear ratio is 10:35, which simplifies to 2:7.

Front

What is the effect of increasing the number of teeth on a driven gear?

Back

Increasing the number of teeth on a driven gear increases torque but decreases speed.

Front

What is the relationship between speed and torque in gear systems?

Back

Speed and torque are inversely related; as one increases, the other decreases.

Front

What is the formula for calculating torque in a gear system?

Back

Torque = Force x Distance from the center of the gear.

Front

What does a gear ratio of 1:7 indicate?

Back

A gear ratio of 1:7 indicates that for every 1 rotation of the input gear, the output gear rotates 1/7 of a turn.