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- Another advantage of metal cased oil seals is their ability to provide a secure and effective seal over a long period of time. The precise design and construction of these seals ensure a tight fit that prevents any leakage of oil or other fluids. This helps to maintain the efficiency and performance of the machinery or equipment in which the seals are installed.
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• Super helix seal
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- Carbon Steel: The most common material for oil seal cases, suitable for use with standard lubricants.
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Figure 9: Housing-bore eccentricity
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NBR
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- Protection from damage: High mileage vehicles tend to suffer from more general wear and tear than younger cars. The additives in high mileage oil preserve and protect your entire engine.


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.
Figure 2: Necessity of spring
PTFE Oil Seals
-15 °C to + 180 °C
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The rubber material used in the oil seal should be selected based on the operational temperature and substance to be sealed.
Table 5 lists the major rubber materials along with their operational temperature ranges.
Note that it is necessary to check the compatibility with fluids.
<N.B.>
Extreme pressure additives are compounds added to the lubricant. They are activated by heat and chemically react against rubber, which deteriorates rubber properties. For this reason, it is necessary to check for compatibility with rubber materials.
What are Oil Seals and the different types?
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While Viton offers a superior temperature and chemical range than other materials, it can be more expensive than the others as well. Let’s take a look at an alternative that is easier on the wallet, Polyacrylate.