This bearing assembly supports a rotating shaft within the cleaning unit of a combine harvester. It is mounted in a housing that positions the shaft relative to the sieve and fan assemblies, maintaining alignment under load. A worn bearing produces radial play that allows the shaft to deflect, leading to vibration and uneven cleaning action. The manufacturer machines the housing bore to match the original assembly's fit, so the bearing seats without additional shimming. On installation, ensure the retaining bolts are torqued to specification and that the shaft rotates freely before reassembling the drive belt.