Automobile oil seal is one of the most commonly used accessories in automobile maintenance. Oil seals are also called oil retaining rings. Wherever various parts of the automobile are equipped with rolling bearings or sliding bearings, oil seals must be installed to prevent the leakage or leakage of lubricating oil or grease, and at the same time to prevent the infiltration of dust or sludge and maintain Good lubrication conditions for rolling or sliding friction parts, extending service life.