Oils Seals are also known as Rotary Shaft Seals, Grease Seals or Dirt Seals. Oil Seals are used to retain grease in a case or housing. Oil Seals close the space between stationary and moving components in mechanical equipment helping to prevent lubricant escape. Oil Seals prevent harmful contaminants from entering machinery. Oil Seals are one of the most popular dynamic seals. Oil Seals seal high speed rotating shafts and low pressure lubricants. Anywhere a bearing is used to support a rotating shaft you can possibly find an oil seal to keep lubricating fluids in the system and contamination out. Oil Seals consist of a rubber elastomer bonded to a metal case or can. Oil Seals usually have a garter spring that helps keep the lip against a shaft.
Oil Seals are typically installed adjacent to a bearing, sealing in or sealing out, as necessary, the various liquids, gases, or solids encountered by the particular mechanism. Some Oil Seals are split for easy installation. Split Oil Seals help to reduce downtime by not dismantling machinery. Split Oil Seals are recommended for horizontal shafts. Oil Seals typically have a single lip or a double lip. Oil Seals are generally the least expensive component, but they serve to be the most important because they protect the more expensive components such as the bearings and gears.
Regularly checking and replacing Oil Seals are a part of successful preventative maintenance.