SKF 87491 Radial Shaft Seal

SKF 87491 is a CR (SKF) radial shaft seal designed to sit between a rotating shaft and its housing, providing a barrier that helps retain lubricant while blocking contaminants from entering the bearing cavity. As a member of SKF's CR-series, the 87491 designation identifies the specific seal in SKF's catalog, facilitating sourcing and replacement in mechanical assemblies that rely on reliable shaft sealing. Radial shaft seals like this are installed where a shaft penetrates a stationary housing, and they work by maintaining lip contact with the shaft and sealing surface to control leakage and ingress under typical operating conditions. The SKF brand designation signals a seal designed to meet the general expectations of durability and compatibility with common lubricants and bearing systems, though exact fitment details should be verified against SKF's official part data for precise dimensions and material specification.