Spring Washers

Bowed Washers

  • 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

  • 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.

Slotted Washer

  • 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.