Chain coupling is a mechanical connection that links two rotating shafts using a chain. This type of coupling allows for flexibility in alignment and can accommodate some misalignment between the shafts. It is commonly used in various machinery where a reliable power transmission is needed. The main advantage of chain coupling is its ability to absorb shock loads and vibrations, which helps protect the connected equipment. Additionally, it can be easily adjusted or replaced, making maintenance straightforward. This makes chain coupling a popular choice in industries such as manufacturing and automotive engineering.