Metal-cased oil seals are usually installed in a housing bore made of the same material. This allows for equal expansion and contraction of the materials during operation, preventing leakage. This type performs best when used in a steel housing.


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Proper preparation is crucial for successful oil seal installation. Ensuring that the seal, shaft, and bore are correctly prepared and aligned prevents seal failure, leakage, and premature wear of the components.
Among the most common causes of oil seal failure are:
Proper care and maintenance of square rubber gaskets are essential to ensure their longevity and effectiveness. Regular inspection for signs of wear, damage, or degradation is important to prevent leaks and maintain the integrity of the seal. Replacing worn or damaged gaskets promptly can help prevent costly repairs and downtime.
Table 2 b): Common types of oil seals (without spring)