This ball bearing supports a rotating shaft within the cleaning system of a grain harvester. It is mounted in the cleaning shoe assembly, where it allows the shaft to turn freely while maintaining alignment under load. A worn bearing produces excessive radial play, leading to shaft misalignment and uneven cleaning action. This original bearing is manufactured to the same internal clearance and raceway geometry as the component it replaces, so it maintains the original shaft support stiffness without requiring shimming or housing modification.