Iso13715 ((hot)) Info

was developed to resolve this ambiguity. It provides a method for indicating the condition of an edge (whether it is sharp, rounded, or has a burr) directly on the technical drawing using specific symbols and values. This ensures that the designer's intent regarding edge quality is clearly transmitted to the manufacturing and quality control departments.

ISO 13715 defines a graphical symbol resembling a small "tick" or checkmark ($\checkmark$), usually placed at the vertex of the edge being specified. iso13715

Indicates a sharp edge (neutral). No burr or undercut is allowed beyond 0.2 mm. In practice, this usually means the edge may be slightly rounded or flat but cannot have a projection or visible undercut. Note: Often, the value '0' is used to denote a theoretically sharp edge. was developed to resolve this ambiguity