Generally, washers used for construction purposes tend to distribute the load or force between two fastening components, but these tiny spacers can provide more specific functionality. They have what is referred to as axial flexibility or deformation resistance, thus preventing loosening usually caused by vibration and other forces. There are many subtypes of washers that perform in this way and one of the most common is spring washers.
When these washers are subjected to load, the irregularities in its structure squeeze-in, responding to a structural balance that causes them to return to a predetermined shape. They are typically used when the assemblies must avoid rattling, maintain tension, counteract expansion and contraction post-assembly, and provide a controlled reaction when subjected to varying loads.
The spring washers have further subtypes, some of these are:
- Belleville – These washers support high loads with minimal deflection and are used for thermal expansion applications or in a shock absorbing capacity.
- Crescent – These washers support smaller loads and allow small deflection. They are used for load cycling applications.
- Finger – These washers combine the benefits of crescent and wave washers and are used for noise and vibration dampening.
- Wave – These washers offer