Position interpretation
Position interpretation
(OP)
Hi everyone, I am new to the forum. I have a question about interpreting positional location. We are using ASME Y14.5 as standard. I have skecthed the query on the attached powerpoint and would welcome your comment. I know which I believe to be correct.
Thanks in advance
Richard
Thanks in advance
Richard





RE: Position interpretation
RE: Position interpretation
RE: Position interpretation
RE: Position interpretation
RE: Position interpretation
RE: Position interpretation
From the discussion we have in the other thread on parallelism per unit, I feel there is someone who may disagree with me on this one
RE: Position interpretation
RE: Position interpretation
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
http://www.gdtseminars.com
RE: Position interpretation
RE: Position interpretation
AMLbody,
If your colleague wants the tolerance zone to be spherical, it has to be specified in FCF as spherical diameter (see for example ASME Y14.5-2009 Fig. 7-35). Although I don’t think it will help in this particular case.
But I see bigger problem here. From the drawing you provided, I cannot see that the hole is round.
If the hole is square, cylindrical tolerance zone will not apply either.
Here, pmarc. Is this what you were waiting for?
RE: Position interpretation
I would also be careful even to mention a possibility of applying spherical tolerance zone here without cautioning that this not only won't be helpful, but also will be flawed callout for cylindrical hole.
RE: Position interpretation
I do not want to specify a spherical tolerance but wanted clarification of the intent of the standard.
Picking up on your comment CheckerHater, if the hole were square and I want a cylindrical tolerance zone would this call out be correct?
RE: Position interpretation
I’d say it wouldn’t (I already did once).
Spherical tolerance zone better to be reserved for spherical features, that’s for sure.
RE: Position interpretation
Spherical tolerance zone got me thinking, so I am starting new thread:
http://www.eng-tips.com/viewthread.cfm?qid=328384
Everyone is welcome.
RE: Position interpretation
Dave D.
www.qmsi.ca