During a chain inspection, how freely should links be able to rotate without binding?

During a chain inspection, the ability of the links to rotate freely without binding is crucial for the efficient and safe operation of the chain. The correct answer indicates that chain links should be able to rotate 90 degrees without binding. This degree of movement ensures that the links can articulate smoothly, allowing the chain to function effectively in its intended application, whether it's for lifting, pulling, or securing loads.

When links are unable to rotate freely, it can lead to increased wear, potential failure, and ineffective operation under load. A rotation of 90 degrees typically allows for enough maneuverability while still ensuring the integrity of the chain's structure and functionality. Greater range of motion, such as 180 or 360 degrees, might not represent practical requirements in most applications, as they might indicate over-extension or unnecessary looseness, while less movement like 45 degrees could signal binding or obstruction, which is not acceptable for safe operation.