The formula to calculate the Velocity Ratio of Simple Belt Drive is:
\[ i = \frac{d_{driver} + t}{d_{follower} + t} \]
Velocity ratio is the distance through which any part of a machine moves to that which the driving part moves during the same time. Diameter of Driver is the longest possible chord of any circle that runs through the center point of the circle. Belt Thickness is defined as the thickness of the belt used in belt drives. Diameter of Follower is the longest possible chord of any circle that runs through the center point of the circle.
Let's assume the following values:
Using the formula:
\[ i = \frac{0.011 + 0.003}{0.014 + 0.003} = 0.823529411764706 \]
| Diameter of Driver (ddriver) | Belt Thickness (t) | Diameter of Follower (dfollower) | Velocity Ratio (i) |
|---|---|---|---|
| 0.01 | 0.003 | 0.014 | 0.764705882352941 |
| 0.011 | 0.003 | 0.014 | 0.823529411764706 |
| 0.012 | 0.003 | 0.014 | 0.882352941176471 |
| 0.013 | 0.003 | 0.014 | 0.941176470588235 |
| 0.014 | 0.003 | 0.014 | 1.000000000000000 |
| 0.015 | 0.003 | 0.014 | 1.058823529411765 |
| 0.016 | 0.003 | 0.014 | 1.117647058823529 |
| 0.017 | 0.003 | 0.014 | 1.176470588235294 |
| 0.018 | 0.003 | 0.014 | 1.235294117647059 |
| 0.019 | 0.003 | 0.014 | 1.294117647058824 |