This plain bearing sits in the threshing unit of a harvesting machine. It supports a rotating shaft, reducing friction between the shaft and the stationary housing. The bearing is a sliding type, meaning it relies on a thin film of lubricant between the shaft and the bearing surface rather than rolling elements. Wear in this bearing allows shaft play, which can cause misalignment of the threshing drum or rotor and lead to vibration or uneven threshing. The manufacturer machines the bearing to the original housing and shaft tolerances, so it seats correctly without the need for shimming or reaming.