This sealed deep-groove ball bearing supports the rotating shaft in the seed-metering assembly of the grain seeder. It sits inside the bearing housing on the metering-unit shaft and maintains radial and axial alignment of the rotating components. The 2RS designation indicates two rubber contact seals that retain factory grease and exclude dust and chaff from the bearing raceway. A worn bearing introduces play in the metering shaft, causing uneven seed drop and reduced placement accuracy. The manufacturer machines the bearing to the original shaft-tolerance specification, so no shimming or adapter sleeves are required during installation.