Gear Ratio Final Drive Calculator

Gear Ratio Formula:

\[ \text{Gear Ratio} = \frac{\text{Input Speed (rpm)}}{\text{Output Speed (rpm)}} \]

Gear Ratio:

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1. What is Gear Ratio?

The gear ratio is the ratio of the input speed to the output speed in a mechanical system. It determines how much the input speed is changed by the gear system to produce the output speed.

2. How Does the Calculator Work?

The calculator uses the gear ratio formula:

\[ \text{Gear Ratio} = \frac{\text{Input Speed}}{\text{Output Speed}} \]

Where:

Input Speed — Rotational speed of the input shaft (rpm)
Output Speed — Rotational speed of the output shaft (rpm)

Explanation: The ratio shows how many times the input shaft must rotate to make the output shaft rotate once.

3. Importance of Gear Ratio Calculation

Details: Gear ratio is crucial for designing mechanical systems, determining torque multiplication, and ensuring proper speed conversion in transmissions and drivetrains.

4. Using the Calculator

Tips: Enter input and output speeds in revolutions per minute (rpm). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a gear ratio of 3:1 mean?
A: It means the input shaft rotates 3 times for every 1 rotation of the output shaft.

Q2: How does gear ratio affect torque?
A: Higher gear ratios increase output torque while decreasing speed, and vice versa.

Q3: What are typical gear ratios in automotive applications?
A: Final drive ratios typically range from 2.5:1 to 4.5:1 depending on vehicle type and purpose.

Q4: Can gear ratio be less than 1?
A: Yes, a ratio less than 1 indicates speed increase (overdrive) with corresponding torque reduction.

Q5: How is gear ratio related to gear teeth count?
A: For simple gear pairs, ratio equals driven gear teeth divided by driving gear teeth.