This chain drives the feeder house conveyor that transfers crop material from the header into the threshing mechanism. It is a roller chain with a half link included for length adjustment during installation. A worn or stretched chain causes uneven feeding, which can lead to plugging or reduced throughput at the threshing drum. The manufacturer machines the pins and rollers to match the original sprocket tooth profile, so the chain seats correctly without accelerated wear on the drive components. On installation, verify the chain tension is within the specified range and replace any worn sprockets to avoid premature elongation.