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 PUNCH CLEARANCE CHART FOR MILD STEEL - PDF format

 This chart will provide you with the proper punch clearances for different thicknesses of mild steel.   Too little clearance will produce a double-shear and will shorten the life span of a sharp tool.   Too much punch clearance will produce burrs, deformation of the punched hole and will increase wear on the punch tooling.

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Punch Clearances for Mild Steel - PDF format