This plain bearing fits the pivot point of the sieve rocker arms in a grain harvester. It allows the rocker arms to oscillate freely as they drive the cleaning-sieve motion, converting rotary input from the drive linkage into the reciprocating movement that separates grain from chaff. Wear in this bearing produces slop in the sieve linkage, which reduces cleaning efficiency and can cause uneven material flow across the sieves. The bearing is machined to match the original housing bore and shaft diameter, so no shimming or bushing adapters are required during replacement.