The seal is used to seal oil (oil is the most common liquid substances, the transmission system also refers to the general liquid substance of Italy) mechanical element. It will need lubricating components and output component isolation in the transmission parts, so as not to let the oil leakage. Seals for static and dynamic seals (general reciprocating motion) are called seals. The representative form of the oil seal is TC oil seal, which is a kind of rubber completely covered with self tightening spring lip oil seal, generally said that the oil seal is often referred to as the TC skeleton oil seal.

Oil seal (oil seal) is a common seal of the customary title, simply that the seal of the oil.

Oil seal is generally divided into single type and assembly type, assembly type is the skeleton and lip material can be freely combined, generally used for special oil seal.

From the seal sealing function, characteristics, structure, working condition and sealing mechanism can be divided into various forms and different names, but the habit will generally be called rotary shaft lip seal oil seal, static sealing and dynamic sealing (general reciprocating seal seals called). The representative form of the oil seal is TC oil seal, which is a kind of rubber completely covered with self tightening spring lip oil seal, generally said that the oil seal is often referred to as the TC skeleton oil seal.

Commonly used materials are: nitrile rubber, fluorine rubber, silicone rubber, acrylic rubber, polyurethane, PTFE, etc.. When selecting the material of oil seal, it is necessary to consider the compatibility of the material to the working medium, the adaptability to the working temperature range, and the ability of the lip to follow the rotation speed of the rotating shaft. General oil seal lip temperature is higher than the working medium temperature of 20~50 DEG C, in the selection of oil seal material should be noted. For details, please refer to the types and characteristics of rubber. The working range of the oil seal is related to the material used in the oil seal: when the material is nitrile rubber (NBR), it is -40~120 DEG C, -25~300 rubber (ACM) -30~180 DEG C, fluorine rubber (FPM).