This bearing supports a rotating shaft in the seed-metering assembly of a grain drill. It is a deep-groove ball bearing with integral seals on both sides, which retain lubricant and exclude dust and chaff. The bearing is pressed onto the shaft and housed in the drill frame; it maintains the alignment of the metering disc or coulter drive. A worn bearing produces radial play that causes the shaft to wobble, leading to uneven seed drop and accelerated wear on the shaft seal. The original manufacturer machines the raceways and selects the internal clearance to match the original shaft and housing tolerances, so no shimming or reaming is required during replacement.