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Other uses are as a spacer, spring (Belleville washer, wave washer), wear pad, preload indicating device, locking device, and to reduce vibration (rubber washer). Washers are usually metal or plastic. High-quality bolted joints require hardened steel washers to prevent the loss of pre-load due to brinelling after the torque is applied.
A rubber washer is a ring made of rubber used in mechanical devices. It is used to prevent vibration from spreading from one part to another, reducing the noise levels. Typical uses are mounting computer parts, like fans and hard disk drives.
Unlike rubber, fibre washer seals are considered as a single-use item. Fibre sheet is easily die-cut to complex shapes and so it is widely used for shaped gaskets. These may be used for sealing, as heat insulators, or as mechanical spacers.
Bodok seal, a specialized gas sealing washer for medical applications; Bonded seal, also known as Dowty seal or Dowty washer. A type of washer with integral gasket, widely used to provide a seal at the entry point of a screw or bolt [2] [3] Bridgman seal, a piston sealing mechanism that creates a high pressure reservoir from a lower pressure source
It is the compression of the elastomeric part between the faces of the parts on either side of the bonded seal that provides the sealing action. The elastomeric material, typically nitrile rubber, is bonded by heat and pressure to the outer ring, which holds it in place. This structure increases resistance to bursting, increasing the pressure ...
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