1. What is a Gear Ratio Calculator?

Definition: This calculator determines the gear ratio (GR) between two gears based on their teeth count or rotational speeds.

Purpose: It helps mechanical engineers, automotive technicians, and hobbyists understand the relationship between connected gears.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( GR \) — Gear Ratio (unitless)
• \( Driven \) — Number of teeth on driven gear or its speed (RPM)
• \( Driver \) — Number of teeth on driver gear or its speed (RPM)

Explanation: The ratio compares the driven component to the driving component, showing how many times the driver must rotate to turn the driven gear once.

3. Importance of Gear Ratio Calculation

Details: Proper gear ratio calculation ensures optimal torque and speed transmission in mechanical systems, affecting performance and efficiency.

4. Using the Calculator

Tips: Enter either the number of teeth for both gears or their rotational speeds. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What does a gear ratio of 3:1 mean?
A: It means the driver gear must rotate 3 times to turn the driven gear once, increasing torque but reducing speed.

Q2: Can I use RPM values instead of tooth counts?
A: Yes, the formula works the same way with rotational speeds as it does with tooth counts.

Q3: What's a typical gear ratio for automotive applications?
A: Final drive ratios typically range from 2.5:1 to 4.5:1, depending on vehicle type and purpose.

Q4: How does gear ratio affect torque and speed?
A: Higher ratios increase torque but decrease output speed, while lower ratios do the opposite.

Q5: What's the difference between gear ratio and transmission ratio?
A: Gear ratio refers to a single pair of gears, while transmission ratio is the overall ratio through multiple gear pairs.