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Shear Blade
The hardened steel cutting tool on a shear machine. Blades require periodic indexing (rotating to a fresh cutting edge) or replacement to maintain cut quality. Blade hardness must be matched to the material being cut to avoid chipping.
The shear blade is a hardened steel tool that is under continuous stress and requires regular maintenance to function properly and produce quality cuts. As a blade is used, its cutting edge gradually dulls from the abrasive action of shearing thousands of cuts, and dull blades produce increasingly heavy burr and worse edge quality.
On many industrial shears, the blade can be indexed (rotated to expose a fresh, sharp edge) several times before it must be replaced entirely, extending blade life and reducing replacement costs. The hardness and toughness of a blade must be carefully matched to the material grade being cut; a blade that is too soft will dull immediately, while one that is too hard may chip or break if the machine tries to cut oversize material.
Preventive blade maintenance, including regular inspection, timely indexing or replacement, and proper machine setup to avoid side loading the blade, is essential to maintaining consistent cut quality in any shearing operation.
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