## How do you calculate final gear ratio?

By simply dividing the ring gear tooth count by the pinion gear tooth count, the ratio is determined. For example, if we divide a ring gear with 41 teeth by a pinion gear with 10 teeth we find that the gear ratio is 4.10:1 (41/10 = 4.10). Tire diameter will also have an effect on a vehicle’s final drive ratio.

### How do you calculate gear ratio velocity?

Gear Velocity Ratios Velocity ratios are calculated by dividing the driver gear by the driven gear. The driver gear or pulley is the one connected to the power – e.g. the pedals on a bicycle or the motor. To calculate the speed of the driven gear – multiply the speed of the driver gear by the velocity ratio.

How is diff ratio calculated?

The calculation uses the number of teeth in the ring gear and divides it by the number of teeth in the pinion gear to provide you with a “[result] to 1” ratio. For example, if the pinion gear has 41 teeth, and the ring gear has 11 teeth, the ratio would be calculated as 41/11, which is equal to 3.73 = 3.73:1.

How do you calculate gear ratios with 4 gears?

To calculate the gear ratio: Divide the number of driven gear teeth by the number of drive gear teeth. In our example, it’s 28/21 or 4 : 3. This gear ratio shows that the smaller driver gear must turn 1,3 times to get the larger driven gear to make one complete turn.

## How do you calculate rack and pinion gear ratio?

Instead of counting the number of teeth in each gear, measure the distance the rack moves in inches. Measure the distance from the end of the rack to an arbitrary point, turn the pinion one full revolution and then measure the distance again. The difference between the two is the gear ratio.

### How do you multiply gear ratios?

For example, for the gear at left the blue gears are 7 and 21 teeth, while the green gears are 9 and 30 teeth. Thus, the first gear ratio is 7:21 and the second is 9:30. Multiplying the two together gives (7×9):(21×30) = 63 : 630, which is 1:10.

What is the relationship between gear ratio and speed?

The gear ratio is the ratio of input teeth to output teeth (e.g., with 10 teeth on the input and 20 teeth on the output, the gear ratio is 10/20 or 0.5 : 1 . The speed ratio is the ratio of output speed to input speed (e.g., with a gear ratio of 0.5 , the output speed will be 0.5 that of the input speed).