- In addition to their functional capabilities, hub oil seals also play a crucial role in extending the life of machinery. By preventing the loss of lubricant and the ingress of contaminants, these seals help to reduce wear and tear on moving parts, leading to longer equipment life and reduced maintenance costs.
Oil seals are always exposed to a lot of chemicals, both mild and harsh chemicals. The seals react by showing some signs like cracks, blisters, and discoloration especially when the chemical is harsh. This clearly shows that the chemical is not compatible with the seal, which goes as far as affecting its cross-link density (increase or decrease). When the cross-link density increases, the seal material becomes harder, but when it decreases, the seal material becomes softer.


When the total eccentricity is excessive, the sealing edge of the seal lip cannot accommodate shaft motions and leakage may occur.
Total eccentricity is the sum of shaft runout and the housing-bore eccentricity.
Total eccentricity, shaft runout and housing-bore eccentricity are generally expressed in TIR (Total Indicator Reading).
The proper functioning of seal oil pan, oil seal turbo, and oil gasket seal is crucial for the performance and longevity of the engine. High-quality seals are essential to prevent oil leaks, maintain proper lubrication, and protect the engine components from wear and damage. When selecting these seals, it is important to prioritize quality, durability, and compatibility with specific engine models to ensure optimal performance and reliability.
HOW OIL SEALS WORK
Friction damper
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Like any element of the engine, oil seals are subject to wear. Over time they can lead to possible leaks of lubricating liquid.



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.

