This seed-drill disc plate is the rotating metering element that picks up individual seeds from the hopper and delivers them into the coulter tube. It is mounted on a dedicated hub assembly that includes a bearing, a washer, and six rivets, forming a complete metering unit. The plate rotates at a speed proportional to the forward travel of the drill, and its peripheral pockets or holes control the seed spacing. A worn or damaged plate causes skips or doubles in the seed row, reducing planting accuracy. The hub and bearing assembly supports the plate with minimal radial play, which is necessary for consistent seed pick-up. When replacing the plate, inspect the hub and bearing for wear and replace the rivets with the specified fasteners to maintain the assembly's integrity.