Oil seals, also known as shaft seals or grease seals, are indispensable elements in the machinery world, preventing lubricating oils or other fluids from escaping the confines of mechanical equipment. They are most commonly installed on rotating shafts or bearings found in diverse applications such as engines, gearboxes, pumps, and axles. Structurally, oil seals are composed of an outer metal ring or casing, an inner sealing lip crafted from robust rubber or elastomeric material, and a spring that provides consistent tension on the sealing lip against the shaft surface. The sealing lip maintains contact with the rotating shaft, creating a reliable barrier to stop the escape of lubricants and the penetration of contaminants. These seals are essential for ensuring the efficiency and longevity of machinery, as they prevent oil leaks that could lead to component damage, loss of lubrication, and eventual equipment failures. Available in a variety of sizes, materials, and designs, oil seals meet diverse operating conditions and requirements. In essence, oil seals are critical components in machinery, safeguarding proper lubrication and preventing fluid leaks to maintain peak performance and reliability.