Welcome to the belt length calculator! If you need to determine the length of any belt - be it a timing, ribbed, flat, or v-belt - you are in the right place. In the following text, we will introduce you to the belt length formula and show you how to use it.
Pulleys can trace their origins to before 200 B.C. Originally, they were used to lift buckets of water from wells, rivers, etc. Nowadays they are everywhere - in clocks mechanisms, on construction sites, and in elevators. And that's just the tip of the iceberg. System like this are used to transmit torque (or power) across axles, providing mechanical advance.
Let's learn how to calculate the length of a belt in a two-pulley system with differing diameters of pulleys. You can do it by inputting the distance between the axles of the pulleys and their diameters into the following formula:
It works well for two pulleys of a similar size or ones that are further apart. The estimation fails when one pulley is much larger than the other and they are close together. However, such cases are uncommon in engineering, as they can lack the adequate drive. As engineers didn't always have a belt length calculator at hand, they used a simplified equation to calculate faster.