This bar is part of the threshing mechanism in a combine harvester. It is mounted on the threshing drum or concave assembly and interacts with the rotating rasp bars or concave grates to separate grain from the straw. A worn or damaged bar reduces threshing efficiency, allowing unthreshed heads to pass through the machine. This original component is machined to the same profile and hardness as the original assembly, which maintains the correct clearance between the drum and concave for consistent separation. On installation, check the gap between the bar and the opposing surface and adjust to the specified clearance.