In simple terms: It tells the manufacturer what to do with the edges of a part—whether to leave them sharp, break them with a chamfer, or round them—without cluttering the drawing with redundant dimensions.
In the world of technical drawings and manufacturing precision, every micron counts. However, not every edge on a workpiece can be perfectly defined. Enter ISO 13715 , an often-underestimated but critical international standard that governs how to specify the condition of undefined edges. iso13715
The standard was previously known as , with the latest revision being ISO 13715:2017 . Why Do We Need It? Without ISO 13715, engineers would have to individually dimension every single edge on a complex part. Imagine a bracket with 50 edges—each requiring a "0.5 x 45°" callout. This is not only time-consuming but also makes drawings unreadable. In simple terms: It tells the manufacturer what