| 摘要 |
A forage harvester shear bar having a first surface across which crop material is fed for cutting by the harvester cutterhead. A cutting surface perpendicular to the first surface forms a cutting edge therewith. The shear bar is arched upwardly by clamping against an arched support to provide enhanced rigidity and strength. The cutting surface is formed with a concavity therein, prior to being worn by usage in the forage harvester, to provide enhanced ability to achieve optimum, uniform clearance from the cutterhead. The concavity in the cutting surface provides compensation for the arch formed in the shear bar.
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