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- NBR oil seals are a crucial component in various industries, including automotive, aerospace, and industrial machinery. These seals are made from Nitrile Butadiene Rubber (NBR), which is known for its excellent resistance to oil, heat, ozone, and chemicals. In this article, we will provide a comprehensive guide to NBR oil seals, including their types, applications, and maintenance.
Choosing Quality Oil Seals for Wheel Hubs and Steering Mechanisms

Advantages of Silicone and Rubber Gaskets
A wide range of sealing devices are used in various machines.
Sealing devices serve the following functions:
Both sealing types are popularly used in different mechanical engineering applications. How are they different? The article explains the fundamental working mechanism of both categories of seals.
Oil leak: the most frequent failure of the oil seal
Early engines used O-rings (also called packing rings or toric joints) as seals (first patented in 1896). These are just mechanical gaskets in the shape of a torus (a circular ring--like a lifesaver), seated in a groove and compressed during assembly between two or more parts. It creates a seal at the interface. However, O-rings require a fluid film to lubricate them. They have limited usefulness in vacuum application and at extremes of temperature. The modern oil seal represents a significant improvement over the simple O-ring because it effectively seals in lubrication and prevents contamination from outside under a wide range of pressures and temperatures.