Din Iso 13715 ((full)) Link

In the drawing’s general notes, write the default: "Undefined edges according to DIN ISO 13715."

(Technische Produktdokumentation – Kanten) is the international standard governing the indication of edge states on technical drawings. din iso 13715

In a perfect CAD model, edges are infinitely sharp. In reality, manufacturing leaves burrs or requires slight undercuts to function. This standard provides a standardized symbology to communicate exactly how much material can be added or removed at these transition points. In the drawing’s general notes, write the default:

![Example symbol structure: A triangle-like figure with a line pointing to the edge, plus a numeric value.] In the drawing’s general notes

The magic of DIN ISO 13715 lies in its simple, graphic notation placed directly on the drawing’s edge line.