Bending
- vertical crease should be perpendicular to the grain of the metal plates (vertical slit) to prevent cracking along folds - hole should be away from the crease at least equal to 1.5 times the thickness of sheet metal with radius P. True to prevent distortions - should be equal to the fold angle of 90 degrees - a folding Channel width to height of at least 2: 1, and the width should be equal to three times the thickness of the sheet metal, at least.
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