This drive chain transmits power within the drivetrain of a round baler. It connects the gearbox output to the input shaft of the implement pump, providing the mechanical link that drives the bale-forming rollers and the tying mechanism. A worn or stretched chain causes slippage, which leads to inconsistent bale density and can eventually damage the sprockets. This chain is manufactured to the original pitch and tensile specification, so it engages the sprocket teeth without requiring adjustment to the tensioner beyond its normal range. On installation, verify the chain is correctly tensioned and lubricated before the first full cycle.