Official Answer
Answer
Nested wave springs consist of multiple turns coiled in parallel. During installation, it is critical that the waves of each turn remain perfectly aligned (nested). If the turns shift or 'de-nest', the spring will not function as a single high-rate unit; instead, it will exhibit an erratic spring rate and likely fail due to localized over-stressing. To ensure alignment during assembly, specialized mandrels or automated assembly tools are used to keep the turns compressed together while being inserted into the housing. Furthermore, applying a light coating of high-pressure grease helps the turns slide into alignment as the initial preload is applied.
