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　　The TC oil seal, also known as a skeleton oil seal, is a rubber completely covered double-lip oil seal with a self-tightening spring. The TC profile is a shaft seal composed of a single metal cage with a rubber coating, a primary sealing lip with integrated spring, and an additional anti-pollution sealing lip.

　　The materials used for the rubber coating of the TC oil seal can vary depending on the application and operating conditions. Some common materials used for the rubber coating include Nitrile Rubber (NBR), Fluorine Rubber (FKM), and Silicone Rubber. These materials offer different properties such as abrasion resistance, heat resistance, and chemical resistance, making them suitable for different applications.

　　1. Nitrile Rubber (NBR) is a synthetic rubber that is commonly used in applications where oil resistance is required. It has good resistance to oils, fuels, and many chemicals, but is not suitable for use with polar solvents such as ketones or esters.

　　2. Fluorine Rubber (FKM) is another synthetic rubber that offers excellent resistance to high temperatures and chemicals. It is commonly used in applications where exposure to harsh chemicals or high temperatures is expected.

　　3. Silicone Rubber is a synthetic elastomer that offers excellent heat resistance and good electrical insulation properties. It is commonly used in high-temperature applications such as gaskets and seals for engines.

　　TC oil seal is a rubber completely covered double-lip oil seal with a self-tightening spring. The materials used for the rubber coating can vary depending on the application and operating conditions, with common materials including Nitrile Rubber, Fluorine Rubber, and Silicone Rubber. These materials offer different properties such as abrasion resistance, heat resistance, and chemical resistance, making them suitable for different applications.