This gear assembly transmits drive from the baler’s main driveline to the rotating components in the bale chamber. It consists of a gear and an integrated bearing that support the shaft and maintain alignment under load. A worn gear or bearing produces noise and irregular motion in the pickup or rotor, which can lead to inconsistent bale density or jamming. The manufacturer machines the gear to match the original tooth profile and bore tolerance, so the assembly seats on the shaft without additional shimming. On installation, verify that the retaining hardware is torqued to specification and that the gear rotates freely before reassembling the drive covers.