Oil seals, also known as rotary shaft seals, are mechanical devices used to prevent the leakage of fluids, including oil, from a rotating shaft. They are commonly used in a variety of industrial applications, such as pumps, gearboxes, and engines.The primary function of an oil seal is to prevent the leakage of oil or other fluids from the system, while also preventing the entry of contaminants into the system. Oil seals typically consist of a flexible lip made of materials such as rubber, silicone, or polyurethane, which comes into contact with the rotating shaft to create a seal.Oil seals can be divided into two main categories: radial lip seals and axial lip seals. Radial lip seals are the most common type of oil seal and are used to prevent the leakage of fluids from the shaft to the outside. Axial lip seals, on the other hand, are used to prevent the leakage of fluids along the length of the shaft.Oil seals are designed to operate under a range of conditions..www.bdseals.com/oil-seals.html