- The choice of materials for metallic oil seals depends on the specific application requirements. Common materials used in the construction of these seals include stainless steel, carbon steel, aluminum, and brass. The sealing element, on the other hand, is typically made from materials such as nitrile rubber, fluoroelastomers, or PTFE, which offer excellent resistance to heat, chemicals, and wear.
Oil seals, also known as rotary shaft seals, are designed to prevent oil leaks in rotating machinery by sealing the gap between a rotating shaft and a stationary housing. Proper installation of oil seals is essential to ensure a leak-free performance, which in turn helps to extend the life of the machinery. In this article, we will go over the steps for installing oil seals correctly.

ptfe oil seal. This makes them suitable for use in applications where other types of seals may be damaged by exposure to chemicals.



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Figure 2: Typically shaped oil seal and component nomenclature


Oil seals keep contaminants separate from the lubricants that keep rotating shafts and precision bearings in good working order. Oil seals are also known as rotary shaft seals, lip seals, and shaft seals.
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Seals are classified by O.D. wall material, lip type, and whether they have a spring or not.
Major oil seals are specified in ISO 6194-1 and JIS B 2402-1.
Table 2 shows the common types of oil seals, while Table 3 shows the features of each type of oil seal.
Table 4 lists the JTEKT oil seal type codes and corresponding ISO and JIS standards.