Una arandela es un disco delgado con un agujero, por lo común en el centro. Normalmente se utilizan para soportar una carga de apriete. Entre otros usos pueden estar el de espaciador, de resorte, dispositivo indicador de precarga y como dispositivo de seguro. Las arandelas normalmente son de metal o de plástico. Los tornillos con cabezas de alta calidad requieren de arandelas de algún metal duro para prevenir la pérdida de pre-carga una vez que el par de apriete es aplicado. Los sellos de hule o fibra usados en tapas y juntas para evitar la fuga de líquidos (agua, aceite, etc.) en ocasiones son de la misma forma que una arandela pero su función es distinta.Las arandelas también son importantes para prevenir la corrosión galvánica, específicamente aislando los tornillos de metal de superficies de aluminio.

es.wikipedia.org · CC-BY-SA

A washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a screw or nut. 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 usually have an outer diameter (OD) about twice larger than their inner diameter (ID). 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. Rubber or fiber gaskets used in taps (or faucets, or valves) to stop the flow of water are sometimes referred to colloquially as washers; but, while they may look similar, washers and gaskets are usually designed for different functions and made differently. Washers are also important for preventing galvanic corrosion, particularly by insulating steel screws from aluminium surfaces. The origin of the word is unknown; the first recorded use of the word was in 1346, however, the first time its definition was recorded was in 1611.

en.wikipedia.org · CC-BY-SA