This bearing is a key element within the threshing mechanism of the parent combine harvester or forage harvester. It supports the rotating shaft that drives the threshing drum, maintaining alignment under the high radial and axial loads of the crop-processing cycle. A worn bearing introduces play in the drum shaft, which leads to vibration, uneven threshing clearance, and accelerated wear on adjacent seals and pulleys. As an original component, it uses the 20213 KT C3 specification, which matches the housing bore and shaft diameter of the original assembly without requiring shimming or adapter sleeves. On installation, inspect the shaft journal and housing bore for scoring or fretting, and apply the correct interference fit per the service manual.