This self-aligning bearing supports the straw-walker shaft in the cleaning unit of a combine harvester. It allows the shaft to rotate freely while accommodating minor angular misalignment between the mounting points, which reduces binding and wear on the shaft seals. The bearing is delivered with a clamping ring that secures it to the shaft. A worn bearing produces increased vibration and noise from the walker assembly, and if left unchecked can lead to shaft scoring or seizure. The original manufacturer machines the spherical outer race to match the housing bore geometry, so the bearing self-aligns without requiring shimming during installation.