The quantity of teeth on your input or driving gear.
The quantity of teeth on your other gear.
Gear ratio effects
Gear ratio effects
The torque produced by the input gear when you turn it.
The torque produced by the gear train at the output gear.
FAQs
How do you calculate the gear ratio? ›
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 I find the right gear ratio? ›For the ring gear, the more teeth, the lower the top speed, but faster the acceleration will be achieved. Less ring gear teeth will result in higher top speed but slower acceleration. The gear ratio is calculated by taking the number of ring gear teeth and dividing it by the number of pinion gear teeth.
How to convert gear ratio to RPM? ›To find the RPM of an output shaft/mechanism, take the input RPM (i.e. the motor speed), and multiply it by the gear ratio (the ratio of the number of teeth on the input gear to the number of teeth on the output gear). 600 RPM * (60/12) = 3000 RPM. The consideration of a “slow” or “fast” RPM depends on the mechanism.
What is a 5 to 1 gear ratio? ›For example, if a motor drives a 12T gear to a driven 60T gear on an arm, the 12T driving gear has to rotate 5 times to rotate the 60T driven gear once. This is known as a 5:1 ratio. The torque output is 5 times as much, however, the speed output is only 1/5.
How do you calculate the gearing ratio? ›How to Calculate the Net Gearing Ratio. Net gearing can also be calculated by dividing the total debt by the total shareholders' equity. The ratio, expressed as a percentage, reflects the amount of existing equity that would be required to pay off all outstanding debts.
Where do I find my gear ratio? ›Check the Differential Cover
The axle may have a sticker, and on the differential cover, you might have a small metal tag that's sticking out that will have the gear ratio stamped on it.
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.
Gear Ratio / Tire Size Table
| GEAR RATIO | ||
|---|---|---|
| T I R E D I A M E T E R | 3.73 | |
| 28" | 2909 | |
| 29" | 2809 | |
| 30" | 2715 | |
To convert from gear rpm to gear speed in rad/s: multiply gear rpm by π/30. Gear rpm indicates how many rotations a rotating object makes per minute. To convert from gear speed in rad/s to gear speed in rpm: multiply gear speed in rad/s by 30 / π 30/\pi 30/π.
What RPM should each gear be? ›| Manual transmission change speeds - UP - | ||
|---|---|---|
| Gear Change | Approx. Speed | Tachometer (Revs) |
| 1st – 2nd 2nd – 3rd 3rd – 4th 4th – 5th | 25 km/h 40 km/h 60 km/h 80 km/h | 2,000 – 3,000 rpm 2,500 – 3,500 rpm 2,500 – 3,500 rpm 2,500 – 3,500 rpm |
How do you calculate gear ratio? ›
Students derive the formula for finding the gear ratio of a pair of gears: gear ratio = teeth in driven gear/teeth in driver gear.
What does a 4.10 gear ratio mean? ›It simply means that the input shaft will turn four revolutions, plus one tenth of a revolution, for every single turn of the output shaft. That results in a speed reduction, and a torque increase. The output speed is 1/4.1 times the input speed (. 2439 ish) and the output torque is multiplied by 4.10. 10.
How to figure out gear ratio without pulling cover? ›With the transmission in neutral, rotate the rear driveshaft by hand. Count the number of driveshaft revolutions required for one revolution of the tire. If the driveshaft turns approximately 3-1/2 times, you have a 3.54 ratio, etc.