Flange bearings feature high-performance polymer construction. They are lightweight, self-lubricating, and maintenance-free. They are also resistant to corrosion, dirt, and dust. Spherical flange bearings help to compensate for alignment deviations.A flange bearing is a type of mounted bearing in which the mounted shaft runs perpendicular to the mounting surface and the center line of the mounting holes. This is in contrast to a pillow block bearing, in which the mounted shaft runs parallel to the mounting surface.Flange bearings consist of a flanged housing and an insert bearing. The housing is typically made from cast iron or cast steel while the bearing can be made from a wide variety of materials.