Oil seals go by many names, such as shaft seals, dirt seals, grease seals, lip seals, and many other variations of these. They are essentially simple devices used in rotary shaft equipment to prevent lubricant from escaping and for excluding contaminants such as dust, dirt and water. An oil seal’s most important function, however, is that it protects every type of ball, sleeve and roller bearing in the rotating shafts. The seals also prevent the integration of two different fluids that shouldn’t mix, such as oil and water.
Replacing gaskets and oil seals
Rubber or rubber fabric

What are Oil Seals and the different types?
Replace the sump drain plug tightly and refill the engine with the right amount and grade of oil.
Polytetrafluoroethylene
Chemical resistant
Low coefficient of friction poor elastic properties not wear resistant if used by dynamic applications
• Super helix seal (seal with one-way two-step screw)
1 .Material: There are 7 types of material used for oil seals, they are.
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What Are Oil Seals?
Developments and issues


Oil seals come in various shapes to fit the machines and substances to be sealed.
Figure 2 shows the structure and the names of the various components of the most typical oil seal.
The functions of the various components are also indicated in Table 1.