Design Tips

Designing sheet metal parts using simple guidelines ensures parts are easy to manufacture and here are some tips regarding minimum flange sizes, holes sizes and hole positions. It might also be useful to look at Materials and Finishes

L-Bend minimum flange sizes
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t (swg/mm)	Min X	Min Y
26/0.5mm	n/reqd	5.0mm
24/0.6mm	n/reqd	7.0mm
22/0.7mm	n/reqd	8.0mm
20/0.9mm	n/reqd	9.0mm
18/1.2mm	n/reqd	10.0mm
16/1.5mm	n/reqd	11.00mm
14/2.00mm	n/reqd	12.00mm
12/2.5mm	n/reqd	13.00mm
10/3.0mm	n/reqd	14.0mm

Z-Bend minimum flange sizes
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t (swg/mm)	Min X	Min Y
26/0.5mm	5.0mm	5.0mm
24/0.6mm	5.0mm	7.0mm
22/0.7mm	5.0mm	8.0mm
20/0.9mm	5.0mm	9.0mm
18/1.2mm	5.0mm	10.0mm
16/1.5mm	5.0mm	11.00mm
14/2.00mm	5.0mm	12.00mm
12/2.5mm	5.0mm	13.00mm
10/3.0mm	5.0mm	14.0mm

U-Bend minimum flange sizes
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t (swg/mm)	Min X	Min Y
26/0.5mm	5.0mm	5.0mm
24/0.6mm	5.0mm	7.0mm
22/0.7mm	5.0mm	8.0mm
20/0.9mm	5.0mm	9.0mm
18/1.2mm	5.0mm	10.0mm
16/1.5mm	5.0mm	11.00mm
14/2.00mm	5.0mm	12.00mm
12/2.5mm	5.0mm	13.00mm
10/3.0mm	5.0mm	14.0mm

Hole Blowout on sheet edges
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Blowout will occur if X is less than 1 x material thickness from the sheet edge.

Hole Elongation on bends
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Elongation or will occur if Y is less than 2 x material thickness from the sheet edge.

Tapping Hole sizes
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Insert Hole sizes
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Sheet Thickness conversion – SWG to mm
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