Din Iso 13715 !link! May 2026

Simply put: It tells the machinist how to treat the "leftover" edges—those small intersections between two surfaces where no specific radius or chamfer is called out.

Let’s break down what it is, why it matters, and how to read its symbols. Officially titled "Technical product documentation — Indications for undefined edges," DIN ISO 13715 specifies how to indicate the permissible condition of edges that are not explicitly dimensioned elsewhere on the drawing. din iso 13715

Enter . This standard is the universal language for defining the condition of undefined edges on technical drawings. Simply put: It tells the machinist how to

If you have ever looked at a technical drawing and wondered, "Is that edge supposed to be sharp? How sharp is 'sharp'?" — you are not alone. How sharp is 'sharp'

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

Here is what the symbols mean: