0090// Chamfer Dimensioning
4th May 2017 | Guan Boon, Wong
Recently I encountered some issues for chamfer specification ambiguity. Therefore, I decided to discuss one of the most fundamental knowledge in drafting in this post - - chamfer dimensioning.
Basically, chamfer can be dimensioned by 2 parameters :
1 linear dimension + 1 angle
2 linear dimensions
* refer to ASME Y14. 5-2009, 1.8.16
There are numerous ways for drafter to specify chamfer. Below show some of the examples how to specify a chamfer.
Method 1: Chamfer specified by note (ASME Y14. 5-2009, 1.8.16.1)
However, this method only applicable to 45 degrees chamfer and perpendicular surfaces
Method 2: Round holes (ASME Y14. 5-2009, 1.8.16. 2)
If diameter of chamfer is critical, method 2 will suit your needs. If not the case, method 1 will should be OK.
Method 3: Non-perpendicular intersecting surface (ASME Y14. 5-2009, 1.8.16. 3)
This method will suit your requirements, if the angle between your chamfer's adjacent surfaces not a right angle.
Method 4: General Tolerance by Tittle Block
If you looking for a way to specify all edges with allowable chamfer specifications. This is a easiest way available for you.
Method 5: ISO 13715 Technical drawings — Edges of undefined shape — Vocabulary and indications
If you looking for more well defined specification for edges (undercut, passing, burr and sharp edges) . This will suit your needs.
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