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ASME Y14.5 - chamfers at degree other than 90

ASME Y14.5 - chamfers at degree other than 90

ASME Y14.5 - chamfers at degree other than 90

(OP)
Just to take a short break of radius considerations, I would like to propose chamfer considerations. Please take a look at fig. 1-44 of 1994 standard or 1-45 of 2009 version. Do you think that the method shown on sketches on the left (2 linear dimensions) is OK? I mean, does it fully dimension the chamfer?     

RE: ASME Y14.5 - chamfers at degree other than 90

Yes, it does.
It's not the typical way of doing it for most people, but it works and it's in the standard.

Chris
SolidWorks 09 SP4.1
ctopher's home
SolidWorks Legion

RE: ASME Y14.5 - chamfers at degree other than 90

(OP)
I could agree with, Guys, only if angle between chamfered surfaces is also specified. Without the angle there are infinite possibilities of chamfer's geometry. Am I missing something?

RE: ASME Y14.5 - chamfers at degree other than 90

pmarc,

   You meant Fig 1-46 in the 2009 standard, right?

   Both chamfers are unambiguous.

   The second chamfer with the dimension and angle is fairly easy to inspect if both dimensions are basic and you use a profile tolerance on the chamfer face.  I actually specify stuff like this all the time, although, functionally, the feature never is a chamfer.

   As the designer, I would have made the 2X60° chamfer perpendicular to one of the edges.   

               JHG

RE: ASME Y14.5 - chamfers at degree other than 90

(OP)
Kenat, as you said: "ASSUMING THAT THE ANGLE OF THE PART IS GIVEN ELSEWHERE I'm not sure I see the issue", I also can't see the issue then. But the example to the left (unlike to the right one) does not show this angle, and that's why I got confused.

RE: ASME Y14.5 - chamfers at degree other than 90

It is best to remember that the drawings used in the standard should be considered incomplete. That said, when commenting on them, a statment like Kenat's should be used where necessary.

Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net

RE: ASME Y14.5 - chamfers at degree other than 90

pmarc, ASME Y14.5M-1994 section 1.1.4 should always be kept in mind anytime you see a figure in the standard that appears to missing something.

It would make me a lot happier if people would also keep it in mind when I post the odd sketch to try and show a point I'm making on this site.

Posting guidelines FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm? (probably not aimed specifically at you)
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?

RE: ASME Y14.5 - chamfers at degree other than 90

(OP)
I am aware that figures in the standard are often incomplete by intent, however in this case, unlike to many other examples, lack of the angle created a confusion - at least to me. But OK, let it be. At least now I know that this example has to be considered with additional assumption that quite important information is specified elsewhere.

Anyway, thanks a lot for your quick reaction.   

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