This bushing acts as a wear surface for the knife pivot on a straw chopper assembly. It sits between the rotating knife and its mounting bracket, absorbing the radial load generated during chopping. As the bushing wears, the knife develops excessive play, which leads to uneven cutting and increased vibration in the rotor assembly. The flanged design locates the bushing axially within the bore, preventing it from walking out of position during operation. On installation, ensure the bore is clean and free of burrs to allow the bushing to seat fully.