This chain transmits drive from the feeder housing drum to the elevator slats that carry crop material into the threshing mechanism. It is a roller-type chain designed for the inclined conveyor assembly, where it engages with sprockets at both the lower and upper ends of the housing. A worn or stretched chain causes slat timing drift, leading to uneven crop flow and potential blockages at the drum inlet. The manufacturer machines the chain to the original pitch and roller diameter, so it seats correctly on the existing sprockets without requiring sprocket replacement. On installation, verify that the chain tensioner is adjusted to the specified deflection and that the sprocket alignment is within tolerance.