Oil seal is the customary name for general seals, which is simply the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and also generally refers to the general liquid substance). Oil leakage. Divided into static seals and dynamic seals (generally reciprocating) seals are also called oil seals.
The representative form of the oil seal is the TC oil seal, which is a double-lip oil seal with a self-tightening spring completely covered by rubber. Generally speaking, the oil seal often refers to this tc skeleton oil seal.
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