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Bearing seals and shields have an important role to play in protecting your bearings from dust and other contaminants. In general, sealed bearings are used when there is a large presence of contaminants and/or moisture in the application environment. The seals create an extremely tight seal that keeps contaminants from entering and damaging the bearing. Shields tend to be used in environments in which contaminants are present but where moisture isn’t a factor. We have previously discussed …