Ethylene acrylic elastomer aem is the most common elastomer in north america but various fluorocarbon fkm elastomers are also used. The term buna n is really not much more specific than the term steel.
Automatic Transmission Transaxle In Vehicle Service Ppt
O ring material for transmission fluid. Fluid compatibility guide a detailed list of fluidschemicals with their compatibility ratings for use with the most common o ring materials. Note that each type is actually a family of rubber compounds. Basic o ring chemical resistance compatibility information is based on isolated generic o ring material testing in optimal conditions at room temperature and pressure. Each of these material types has its pros and cons. For the purposes of this article we will focus on just three common rubber types found in o rings and similar automotive seals. In addition to this material various fluorocarbon fkm viton elastomers are also used in these applications.
Buna n viton and epdm. O ring are one of the most commonly used fluid power seals. O ring chemical compatibility chart learn how different o ring materials and chemicals interact. They can also be made from a number of different substances. Aem is the most cost effective but this material degrades more quickly in transmission fluids. 55 to 250 degrees fahrenheit.
O ring groove design guides o ring groove dimension guidelines for standard o ring grooves metric o ring grooves jis o ring grooves and other o ring gland designs. Heres a guide to the kinds of o ring materials we use how they are used and when to avoid using them. A widely used economical material that has strong wear resistance and mechanical properties. One commonly used material for o rings in automatic transmissions is ethylene acrylic elastomer aem also known as vamac. Both these material types have their advantages and disadvantages. O ring materials compatible with automatic transmission fluid select a material to show its compatible chemicals aflas 4 buna n nitrile 4 butyl 1 chemraz 4 epichlorohydrin 0 ethylene propylene 1 fluorocarbon 4 fluorosilicone 0 hypalon 2 kalrez 0 natural rubber 1 neoprene 3 nitrile hydrogenated 4 polyacrylate 4.
These seals have a simple donut shaped ring technically called a toroid and are manufactured using pliable material such as elastomers like silicone buna n and ethylene propylene.
Gallery of O Ring Material For Transmission Fluid
