In this Question Line video, Jason answers the following question regarding tolerances for chamfers and edge breaks: 

In defining edge breaks on the print, Size x Angle, does the print block tolerance for angles apply to the angle of the edge break? Or can it be considered as a nominal target and tool tolerance controlled?
Same with angle of a countersink angle, is the print block angle tolerance also applied to countersink angles?

In this video, Jason walks through several examples to explain the various ways chamfers, edge breaks, and countersinks are dimensioned on a drawing. He also covers what tolerances apply under the ASME standards when none are specified in the field of viewJason emphasizes that the way in which the feature is dimensioned and toleranced should be based on how critical the feature is to the design. 



We want to hear from you! Submit your GD&T question at the link below:      

https://www.gdandtbasics.com/share-your-gdt-questions/     

If your question is selected, we will notify you when our video answer is posted to our YouTube channel.     

* If you are a current student, reach out to us directly and we will get you into contact with your instructor. Active students’ questions receive a direct response within 24-48 hours.        


Stop hunting through pages. Get our GD&T Symbols Chart—your quick reference guide with every symbol on one page.

Save it to your desktop or print it out for quick reference. We’ll send the digital chart straight to your inbox. No spam, just helpful GD&T resources.

Get Your Free Chart