This is designed to allow for tolerance in the hole size and location in the parts being assembled. This would be done for cases where the larger diameter washer may tend to mushroom when the bolt is tightened.Īssemblies often have a slotted or oversize hole on one side. There are times when a large diameter washer used as in #3 above may be used with yet another washer smaller in diameter washer on top of the first. It can help to keep the material flatter or to prevent pullout of the fastener. In these cases the washer would be used against the thin material. Sometimes a thin material is part of the assembly and a larger diameter washer is used to help distribute the pressure of the tight bolt across a larger part of the thin material. This may be particularly applicable when the parts are a softer material such as plastic, brass or aluminum and a washer made of a harder material is used. A nut or bolt head being turned during the tightening process can mar the part surface around the hole and a washer can be used to take the abuse as opposed to the part. It could be used under the bolt head in instances where the bolt screws into threads in one part of the assembly.Ī washer is sometimes used to protect the surface of the assembled parts. A lock washer will be used with the part of the assembly that most likely could turn such as the nut. Known as a lock washer these may be a split ring type, star type, wavy or any one of a number of other designs. Some washers have a special design that attempts to help keep the nut and/or bolt from coming loose. Here are some usages and as you can see it is not likely that a generalized answer can be devised to directly answer your question! Washers are used for multiple purposes when mechanical parts are assembled using bolts and nuts.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |