This bearing supports a rotating shaft within the seed-metering assembly of a precision drill. It maintains radial alignment between the shaft and the housing, allowing the metering disc to rotate with minimal friction. A worn bearing introduces play that causes the disc to wobble, leading to uneven seed singulation and skips in the seed row. The manufacturer machines the raceways to the same internal clearance as the original assembly, so no shimming or adapter sleeves are required during installation.