oil seal

oil seal

In machines, a device that prevents the passage of fluids along a rotating shaft. Seals are necessary when a shaft extends from a housing (enclosure) containing oil, such as a pump or a gearbox. Leather, synthetic rubber, and silicones are among the materials used for the sealing ring. See also bearing.

Variants of OIL SEAL

oil seal or shaft seal

This entry comes from Encyclopædia Britannica Concise.
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