Oil seal is the customary name of general seals, simply put, the sealing of lubricating oil. It is a mechanical element used to seal grease (oil is the most common liquid substance in the transmission system, and also refers to the general liquid substance), which isolates the parts that need to be lubricated in the transmission parts from the output parts, so as not to let the lubricating oil leak. Seals for static seals and dynamic seals (generally reciprocating motion) are called oil seals. Material: NBR FKM ACM silicone
