Seal rings are a circular shaped seals
used to protect a bearing from the outside environment, including gases, liquids, and dust particles. They are an essential part of a bearing assembly, and can have a large impact on bearing performance and operating life. Seal rings are usually made of various types of rubber
, such as nitrile, silicone rubber, or polyacrylate; they can also be made of plastic or metal. Different types of materials have different temperature capabilities and chemical resistances. For example, Buna has high oil and grease resistance, but damages easily in sunlight or ozone exposure. Rubber hardness will also impact bearing performance; softer rubbers have a higher friction coefficient, however they accommodate imperfect surfaces better than hard rubbers. MRO Supply offers a large selection of seal ring replacements to accommodate a variety of applications and working environments. Seal ring improvements are also available for specific applications, such as a teflon coating to maximize bearing performance in extreme temperature conditions.