Posted: Jun 4, 2020
When designing metal blanks for precision metal stamping, there are a few guidelines to follow for the most economical results. Below, you’ll find some of these guidelines. These are tried-and-true best practices we’ve discovered in our over 90 years of metal stamping.
Minimum practical section should never be less than material thickness or .060. A minimum section must be one and one half times material thickness for high shear strength material for the most practical stamping.
Corners can be sharp if material thickness is 1/16 or less — over 1/16 allow corner radii (R) equal to 1/2 material thickness. See illustration above.
Follow these guidelines for maximum economy:
W = .060 minimum for materials thinner than .060 wider if possible.
W1 = Never less than material thickness, wider if possible.
L = 5 x W is maximum depth, should be less if possible.
L1 = 5 x W is maximum length, should be less if possible.
If followed, all blank periphery can be included in the blanking die, eliminating secondary tooling and operations.
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