UCFA204 FYH Bearing Adjustable oval two-bolt Flanged Bearing Cylindrical bore (with set screws) 20mm Inner Diameter Bearing This oval flange type unit allows for anglular adjustment with a supporting point as the shaft center.when the bearing unit is installed, the bearing works fine adjustment of the supporting location for the shaft center is enabled. Since the bolthole center of this unit is the same as that of the diagonal bolthole center of the square four-bolt flange unit and oval two-bolt flange unit, they are all compatible.