1. What is the Pulley Size Equation?

The pulley size equation calculates the required pulley size based on the ratio of input RPM to output RPM multiplied by a base size. This helps in mechanical design to achieve desired speed ratios between connected pulleys.

2. How Does the Calculator Work?

The calculator uses the pulley size equation:

Where:

• \( RPM1 \) — Input revolutions per minute
• \( RPM2 \) — Output revolutions per minute
• \( base size \) — Reference pulley size in inches

Explanation: The equation calculates the required pulley size to achieve the desired speed ratio between two connected pulleys.

3. Importance of Pulley Size Calculation

Details: Accurate pulley size calculation is crucial for proper mechanical design, ensuring correct speed ratios between connected components in belt-driven systems.

4. Using the Calculator

Tips: Enter both RPM values in revolutions per minute and the base size in inches. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if my RPM2 is higher than RPM1?
A: The calculator will return a smaller pulley size, indicating you need a smaller pulley to achieve higher output RPM.

Q2: Can I use this for metric measurements?
A: The calculator works with any consistent units, but the base size should be in the same units you want the result in.

Q3: Does this account for belt slip?
A: No, this calculates the theoretical size. Actual applications may need adjustments for belt slip and other factors.

Q4: What's a typical base size?
A: Base size depends on your application, but common values range from 2 to 6 inches for many mechanical systems.

Q5: Can I calculate RPM from pulley sizes?
A: Yes, you can rearrange the equation: \( RPM2 = RPM1 \times \frac{base size}{calculated size} \).