1. What is Pulley Ratio?

The pulley ratio is the relationship between the diameters of two pulleys in a belt drive system. It determines the speed ratio between the driving and driven pulleys.

2. How Does the Calculator Work?

The calculator uses the pulley ratio formula:

Where:

• \( D1 \) — Diameter of first pulley (m)
• \( D2 \) — Diameter of second pulley (m)

Explanation: The ratio determines how many times the second pulley will rotate compared to the first pulley.

3. Importance of Pulley Ratio

Details: The pulley ratio is crucial for designing mechanical systems to achieve desired speed and torque relationships between components.

4. Using the Calculator

Tips: Enter both pulley diameters in meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a ratio greater than 1 mean?
A: A ratio > 1 means the first pulley is larger than the second, resulting in the second pulley rotating faster than the first.

Q2: How does ratio affect speed?
A: The speed ratio is inversely proportional to the diameter ratio. A 2:1 ratio means the smaller pulley rotates twice as fast.

Q3: Can I use this for belt length calculation?
A: No, this only calculates the ratio. Belt length depends on pulley diameters and center distance.

Q4: Does this work for all pulley types?
A: Yes, the basic ratio calculation applies to flat belts, V-belts, and timing belts.

Q5: How precise should my measurements be?
A: For accurate results, measure pulley diameters precisely, especially for timing belt applications.