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.
If you see a symbol pointing to an edge with a value of 0.5 and a minus sign ( - ), it reads as: din iso 13715
In the world of technical drawing, a line is rarely just a line. It represents a specification, a tolerance, or a critical requirement. Nowhere is this more subtle—or more critical—than in the representation of part edges. In a perfect CAD model, edges are infinitely sharp
The magic of DIN ISO 13715 lies in its simple, graphic notation placed directly on the drawing’s edge line. If you see a symbol pointing to an edge with a value of 0
This standard is the universal language for defining the state of edges on technical drawings. It eliminates the guesswork regarding whether a part should be sharp, rounded, or chamfered. In this post, we will break down what DIN ISO 13715 covers, why it matters, and how to read its symbols correctly.
You might ask: "Why not just specify a chamfer dimension explicitly?"