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- Alinco works according to the tolerance tables of EN1090 EXC2, but processes your materials as well as possible. In most cases, the tolerances will be well below the requirements of EN1090 EXC2.
- Deviating tolerances and critical dimensions must be indicated separately as dimensions on the drawing. We do not take general tolerances mentioned in title blocks into account (which are sometimes not even intended for sheet metal work).
- To draughtsmen: try to specify as few bending radii as possible; it only takes more time in our production if we have to maintain illogical bending radii. In some cases, this is simply not possible, and we will not take it into account (unless large bending radii - a requested R25 will obviously not be bent with an R3). We reserve the right to use a different bending radius; this is also stated on our quotation: deviation +/- R3 possible. For a clearly different radius (e.g., R20 or R50), the correct radii will be applied, but a deviation of +/- 3 is also possible (so R50 can range between R47 and R53).
- For an important dimension, a tolerance may be specified, but do not be too generous or too tight with it. Too tight tolerances in sheet metal work sometimes mean they cannot be maintained, or a few test pieces need to be bent first, with all the extra costs involved. For too tight tolerances, we sometimes specify 'tolerances in sheet metal work not feasible; we do this as well as possible'.
- Perforated sheets are not very dimensionally stable during bending; bends pull away to the weakest point. Consider a broad tolerance when bending and further processing perforated sheets.