Is there really no way to make a chamfer dimension basic? I've searched through the ASME Y14.5 and ISO spec's and do not see any obscure rule for not being able to do this.
Marc, can you provide more information on where you need to have a basic chamfer dimension?
How about a basic dim for the leading edge of the chamfer and then a basic dim for the angle? I know I've seen and used basic for a radius but can't recall seeing them for a chamfer.
Preface: I'm not highly versed in GD&T so the following is probably ignorant...
Isn't a chamfer dimension really just shorthand for 2 dimensions? Whether you use the "__ x ___°" type or the "C__" type, either one is actually two dimensions. It would seem like putting a single basic box around 2 dimensions would potentially cause confusion in interpretation. However, as I said, I'm nowhere close to a GD&T pro, so I'm interested to watch where this one goes...
Basically, a chamfer is 2 dimensions like you've said so rules apply to putting more than one dimension into a basic box.
Mark, this is what I'd do. I don't show any Datums but that could be easily attached as well.
If you use the "chamfer dimension" tool in drawings, the BASIC tolerance option is excluded from the choices for the angle and length tolerances. None, bilateral, and symmetric are the only options given. This means the only way to make the chamfer dimensions basic is the above method with two independent dimensions. I agree that there isn't any rule in the GD&T standards that makes it illegal to call out chamfers as basic. Any chance solidworks will fix this oversight? Any other work arounds to keep the two dimensions as one line and allow them to play with SW Inspection properly?
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