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GD&T Perpendicularity on end face of square extrusion.

Question asked by Chris Berry on Jul 18, 2017
Latest reply on Jul 19, 2017 by Chris Berry

A supplier for my company make 40mm x 40mm aluminium extrusion beams & we specify what lengths to cut them to. However, sometimes when they cut the beams, the cut face is not perpendicular to the main extrusion. Now I could control the perpendicularity by placing a datum on one of the 4 faces but that only controls it to that one face and could be out on the remaining 3 faces. Placing a datum on each of the four faces would work but that’s messy & doesn’t look (or feel) right.

Is there a best method on controlling the cut on the end face?




btw, The four faces of the extrusion are assumed to be straight.