1. What is Belt Ratio?

Belt ratio is a dimensionless value that represents the relationship between two pulley diameters 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 belt ratio formula:

Where:

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

Explanation: The ratio indicates how many times the smaller pulley will rotate for each rotation of the larger pulley.

3. Importance of Belt Ratio Calculation

Details: Calculating belt ratio is essential for designing efficient mechanical systems, determining speed relationships between components, and ensuring proper power transmission in belt-driven machinery.

4. Using the Calculator

Tips: Enter both pulley diameters in meters. Values must be positive numbers greater than zero. The calculator will compute the ratio between the two diameters.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical belt ratio range?
A: Belt ratios typically range from 1:1 to 6:1, though specialized applications may use ratios outside this range.

Q2: How does belt ratio affect speed?
A: The ratio directly determines the speed relationship between pulleys. If D1/D2 = 2, the smaller pulley rotates twice as fast as the larger one.

Q3: Can I use different units for diameter measurements?
A: Yes, as long as both diameters use the same unit system, the ratio will be correct since it's a dimensionless value.

Q4: What if my ratio is less than 1?
A: A ratio less than 1 indicates that D2 is larger than D1, meaning the second pulley rotates slower than the first.

Q5: How does belt ratio relate to torque?
A: The torque ratio is inversely proportional to the speed ratio. A higher speed ratio results in lower torque at the output.