The narrower the final width of the strip, the easier it is for the two edges of a strip lying on a planar support to deviate from a straight line at the sides. This deviation is known as the camber and is generally specified as a maximum bow depth over a measured length of 1 m. Values in accordance with EN 1654 are possible:
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Edge bow/ straightness
| Thickness | Straightness tolerance (mm/m) for widths (mm) | |||
|---|---|---|---|---|
| (mm) | > 3 - 6 |
> 6 - 10 |
> 10 - 20 |
> 20 - 350 |
| up to 0.5 | 12 |
8 |
4 |
2 |
| 0.5 - 1.0 | - |
10 |
6 | 3 |
Increased work in manufacturing allows the straightness of a strip to be reduced to the following tolerances:
| Thickness | Straightness tolerance (mm/m) for widths (mm) | |||
|---|---|---|---|---|
| (mm) |
> 3 - 6 | > 6 - 10 |
> 10 - 20 |
> 20 - 350 |
| up to 0.5 | 7 | 5 | 3 | 1 |
| 0.5 - 1.0 | - | 6 | 4 | 1.5 |
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