Key principles.
1× thickness
Internal bend radius equal to material thickness. Tighter cracks material.
2× thickness
Hole center 2× thickness from edge. Closer risks tearing.
±0.5 mm
Standard bend tolerance ±0.5 mm. Tighter via post-machining.
Edge geometry
V-groove for thicker (>3 mm) butt joints. Allow penetration.
Pre-installed
Threaded inserts pre-installed in sheet metal panels.
50-150 µm
Account for coating thickness in mating tolerance.
FAQ
0.5, 0.8, 1.2, 1.5, 2, 2.5, 3, 4, 5, 6 mm common. Specify per strength/weight requirements.
Internal bend ≥ material thickness for ductile metals. Tighter for special grades. Cracks if too tight.
2× thickness minimum. Tighter risks edge tearing during bending or service.
Cut ±0.1 mm. Bent ±0.5 mm. Welded ±1 mm. Tighter via secondary operations.
5052 aluminum standard for forming. 6061 stiffer. Mild steel cheap. Stainless 304/316L corrosion.
Material, complexity, tolerances, finish, volume. Simple parts at production volume cheapest.
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