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6. Recommended Minimum Ratios of Punched Hole Diameters To Stock Thickness
Limitations are established in common practice for most economical
production. Recommended ratios are applicable to all common metals.
P = Punched Hole Diameter (0.062 min. dia.)
T = Stock Thickness
Material Ultimate Tensile Strength (PSI) - Ratio P to T
32,000 - P = 1.0T
50,000 - P = 1.5T
95,000 - P = 2T
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