Non-uniform profile tolerance
Non-uniform profile tolerance
(OP)
My company is still operating under ASME Y14.5-1994, but I'd like to take advantage of the non-uniform profile tolerance concept in 2009. Any ideas on a general note that could be added to the general profile tolerance annotation to communicate this concept without having to transition to the 2009 edition?





RE: Non-uniform profile tolerance
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Non-uniform profile tolerance
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Non-uniform profile tolerance
RE: Non-uniform profile tolerance
I think I'd have an easier/better chance of selling my the addition to my annotation that I am seeking to QA and engineering as an extension of principal to Y14.5M-1994.
RE: Non-uniform profile tolerance
How does the general profile tolerance annotation look like at the moment?
RE: Non-uniform profile tolerance
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Non-uniform profile tolerance
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Non-uniform profile tolerance
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Non-uniform profile tolerance
pmarc: Please see attached for what the general note says currently.
Belanger: My colleagues are already confused enough on GD&T in general, so added confusion may not help. Instead of understanding, I think they'd just pick on the fact that we don't subscribe to the 2009 revision yet and no one is technically trained to it. 1994 has already been grandfathered in, so no one has been technically trained to that either, but pointing that out won't help my cause! Argh.
RE: Non-uniform profile tolerance
Two things:
1. Seeing how your general notes look like, I would suggest:
- changing note #1 a little bit to something like: "UNLESS OTHERWISE STATED GD&T PER ASME Y14.5M-1994";
- and like Kenat said, mark somehow that this particular tolerance should be interpreted per Y14.5-2009.
If you do not feel comfortable with referring to 2009 edition on the print you could try to...:
- remove phrase "NON-UNIFORM" from profile FCF, put remark "SEE NOTE #3" instead and write in general notes that: "3. PROFILE OF SURFACE TOLERANCE ZONE AS DEFINED BY BASIC DIMENSIONS" or similar.
2. Regardless of how you wil do it, I think profile of surface with non-uniform tolerance zone can work here only if there is no datum reference within non-uniform profile FCF. Presence of any datum reference will cause that the zone for profile of surface tolerance will be fixed with relation to that datum. While nominally tangent surface of .063 cylinder controlled by .002 positional tolerance can float up and down within limits allowed by positional tolerance, the blended surface must stay within fixed tolerance zone, so theoretically there is still a possibility of an abruption in the transition area.
Side note: if the single radius was tangent on its both sides I would recommend using typical directly toleranced radius dimension which as a matter of fact creates non-uniform tolerance zone, quite similar to the one you probably want to define by profile callout (see fig. 2-22 of Y14.5-2009).
RE: Non-uniform profile tolerance
If the 2009 issue isn't desired, wouldn't my sugestion of Y14.41 be valid? I used such a note before Y14.5-2009 was issued without any problems.
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Non-uniform profile tolerance
Could you tell me exactly which paragraph/figure of Y14.41-2003 says something about non-uniform profile of surface tolerance zone? I am having serious troubles in finding anything
RE: Non-uniform profile tolerance
&
fig. 10-19, pg 70
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Non-uniform profile tolerance
Are you thinking about unequally disposed profile tolerance zone? This is not the same as non-uniform profile tolerance zone.
RE: Non-uniform profile tolerance
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Non-uniform profile tolerance
If the thing was about unequally disposed profile tolerance zone, I don't think OP would have any issues, because this concept is pretty well covered in 1994 edition.
RE: Non-uniform profile tolerance
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Non-uniform profile tolerance
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Non-uniform profile tolerance