FLANGE BEARING 2-BOLT 1-1/4|Peer's UCFT 2-Bolt Flange Bearing has a combination of a oval cast iron 2-bolt housing in smaller bolt holes and a set screw insert bearing. Insert Bearings are designed essentially the same as a deep groove ball bearings, except that the outer ring is spherical. This design allows the bearings to be easily mounted in a housing block and be self-aligning.