This self-aligning ball bearing supports the rotating shaft in the cleaning unit of a grain harvester. It is installed at the bearing location within the cleaning system, where it carries the radial load from the sieve or fan shaft while accommodating minor misalignment between the housing and the shaft. The C3 internal clearance allows the bearing to operate at the elevated temperatures typical of a harvester’s cleaning system without binding. A worn bearing produces excessive shaft play, leading to vibration that disrupts sieve oscillation and reduces separation efficiency. The manufacturer machines the bearing raceways to the same geometry as the original assembly, so the spherical outer ring seats correctly in the housing without requiring shimming.