- Bowed (Curved) washers have minimum load build up with maximum washer deflection.
- Light thrust loads compared to other styles of spring washers.
- Used to apply tension between two rotating or static surfaces, eliminate “play”, and prevent rattles.
- The spring rate is approximately linear between 10% and 80% of available deflection.
- Bowed (Curved) washers have the longest length of “beam” of all spring washers. This gives the most washer deflection with a minimum of pushing effort (load build up) of all spring washers.
- Wave washers have more load build up and less deflection than a bowed washer.
- Wave washers are usually used in thrust loading applications for small deflections, particularly where space is limited.
- Wave washers are used to provide a controlled amount of friction between two surfaces and to prevent rattles.
- The spring rate is approximately linear between 20% and 80% of available deflection.
Disc (Belleville) Washer
- For maximum load build up with minimum washer deflection compared to a bowed washer. They provide high loads in small spaces.
- Stacked in nested multiples disc (Belleville) washers provide extreme load build up.
- Stacked in inverted pairs disc (Belleville) washers provide maximum washer deflection (flexibility) and less load build up.
- Used for both dynamic loading as well as static – a typical static application is to take up thermal expansion / contraction on a bolted assembly.
- Provides soft, uniform friction between two surfaces.
- Provides less load build up and more flexibility than a standard disc washer, it offers a wide range of flexibility.
- Intended for maintaining a uniform pressure between surfaces, not for repeated flexing.
- Developed for use in electrical boxes, slotted washers are sometimes referred to as electrical washers.