General Part Design | Wm Dudek Mfg

Minimum Inside Bend Radii

gpd-min-bend-r

For Bends Perpendicular to the Grain Direction Ratio R/t

Soft Material, Copper Annealed, CRS .5 to 1.5
Medium Hard, Annealed Spring Steel 1.5 to 2
Tempered Material, ¾ hard Stainless >2.5

For Bends Parallel to the Grain Direction

Consult Material Supplier’s Guidelines

Material the 10:1 Rule

A ratio of material width to thickness of less than 10:1 presents additional challenges.

Material may exhibit dish. Dish is crown across the width of the material.
Reduces the number of potential suppliers because it is considered a difficult slit. Increases cost and decreases availability.
When this situation cannot be avoided evaluate the cost and suitability of using flat wire.

Part End Designs

gpd-end-designs

Hole Alignment

When two holes must be coaxial consider making one larger, or oblong.

This is necessary due to variations in material elongation and machine feed length.
As the number of bends between the holes increases so does the potential for variation.

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