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.
Elastomer Selection Chart
O ring material for transmission fluid. 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. Fluid compatibility guide a detailed list of fluidschemicals with their compatibility ratings for use with the most common o ring materials. Ethylene acrylic elastomer aem is the most common elastomer in north america but various fluorocarbon fkm elastomers are also used. 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. One commonly used material for o rings in automatic transmissions is ethylene acrylic elastomer aem also known as vamac. They can also be made from a number of different substances.
Both these material types have their advantages and disadvantages. Buna n viton and epdm. O ring chemical compatibility chart learn how different o ring materials and chemicals interact. The term buna n is really not much more specific than the term steel. Note that each type is actually a family of rubber compounds. 55 to 250 degrees fahrenheit.
Aem is the most cost effective but this material degrades more quickly in transmission fluids. In addition to this material various fluorocarbon fkm viton elastomers are also used in these applications. Basic o ring chemical resistance compatibility information is based on isolated generic o ring material testing in optimal conditions at room temperature and pressure. O ring are one of the most commonly used fluid power seals. A widely used economical material that has strong wear resistance and mechanical properties. Heres a guide to the kinds of o ring materials we use how they are used and when to avoid using them.
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
