What are the aluminium extrusion general tolerances?

The main standard for aluminium extrusion tolerances is European Standard BS EN 755. However, where tighter tolerances are needed, we may be able work to the standards set out in BS EN 12020. There are some circumstances (usually depending on the size and intricacy of the profile being extruded) where we may not be able to improve on the aluminium extrusion general tolerances outlined in BS EN 755. The best way to check the tolerances we can achieve on your project is to ask: we can carry out a review of your proposed profile using dimensioned drawings, and let you know what’s achievable.