This V-belt transmits drive from the engine to the threshing mechanism on the parent forage harvester or combine. It sits in the pulley system that powers the rotor or cylinder assembly; tension is maintained by the belt-tensioner arm. A slipping or worn belt reduces threshing speed, leading to incomplete crop separation and increased loss over the cleaning shoe. The belt profile matches the original pulley groove geometry so that the full contact arc is preserved and no re-grooving of the pulleys is required. On installation, verify belt tension against the manufacturer's deflection specification.