Iso13715 Now
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.
Indicates a permitted burr . The edge may have a projection of material up to 0.3 mm. This is often specified when a slight burr is permissible to avoid costly deburring operations, provided it does not interfere with assembly.
An "undefined edge" (also known as a burred edge or non-specific edge) is an edge of a part that has not been specifically machined to a precise radius or chamfer. It is the raw result of a cutting, forming, or casting process. These edges can have two main features: iso13715
Indicates a required undercut or rounding. Material must be removed. This effectively acts as a dimension for a chamfer or radius, simplifying the drawing by not requiring a detailed view for minor edge breaking.
The latest version of the standard, ISO 13715:2017 , includes several specific documentation features: Iso 13715 Standard - sciphilconf.berkeley.edu In simple terms: It tells the manufacturer what
Using this standard is not just about compliance; it directly impacts part quality and costs. A. Assembly and Fit
): Indicates an edge where either a burr or an undercut is acceptable within a specified range. Core Features of ISO 13715:2017 This is often specified when a slight burr
Imagine a machined aluminum housing. The drawing states:
The standard provides a clear graphical syntax to communicate edge quality to machinists. A. The Basic Symbol Components An angular bracket (shaped like a ) oriented to indicate the edge in question. The Value (
is an international standard that defines the rules for indicating the state of edges that are not explicitly dimensioned in a technical drawing.
