This roller chain transmits rotary motion between two sprockets in a seed drill's metering drive system. It connects the gearbox output to the shaft that drives the seed-metering discs, ensuring consistent rotation speed across the working width. A worn or stretched chain causes slip that leads to uneven seed spacing between rows. The chain is supplied as a 5-meter length, which the installer cuts and joins to match the specific center distance of the host drill. On installation, ensure the chain runs with the correct tension and that the master link clip is oriented with its closed end facing the direction of travel.