This bearing supports the rotating shaft within the header’s material feeding unit. It carries radial and axial loads from the driven components, maintaining alignment between the shaft and the housing. A worn bearing produces play that allows the shaft to deflect, leading to misalignment of the feed chain or auger and increased vibration. The manufacturer machines the outer race and inner bore to the same tolerances as the original assembly, so the bearing seats correctly in the housing without additional shimming. On replacement, clean the housing bore and apply a light coat of anti-seize to the shaft journal before pressing the bearing into place.