The most distinctive feature of a flange bearing is that it has a flange (flange) on the outer or inner ring of the bearing. This flange serves the function of axial positioning and fixing, allowing the bearing to be directly fixed to the mounting surface of the equipment via bolts or other means. It eliminates the need for additional axial positioning devices, reduces the number of parts and installation space, and simplifies the design of the mechanical structure. For example, the common pillow block insert flange bearing integrates the insert bearing with the flange housing, making installation more convenient.