Limited Length 1.7.3 ASME Y14.5 M-1994
Limited Length 1.7.3 ASME Y14.5 M-1994
(OP)
I have a place where I need to callout a limited length on a drawing. Easy enough. But the standard says I need to call out a dimension for the length. Will the dimension that calls out the length be a basic or will it have a tolerance? I guess the .200 dimension in the example PDF is what I am questioning. Thanks.





RE: Limited Length 1.7.3 ASME Y14.5 M-1994
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Thanks
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
As ewh points out there is always some kind of tolerance whether it be direct or from some form of GD&T. On a gage dimension on a taper, the tolerance for the resultant surface is still there just expressed in a different way.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Chris
SolidWorks 09 SP4.1
ctopher's home
SolidWorks Legion
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Yes This will be acceptable.
What is happening on this part is that there is a small amount of draft on the od. As long as the B datum per the .200 is in tolerance we will allow the rest of the part to vary per the tolerance specified on the other end. So what we are trying to accomplish is to have nore tolerance on one end of the part than the other to allow for the small amount of draft that is produce during the anufacturing process.
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Not somehting I recal ever really dimensioning though, I think it's addressed in the standard.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
So I guess basic dims can be used to show a limited length, but it necessarily implies that the manufacturer have some documentation on hand about how accurate that needs to be.
John-Paul Belanger
Certified Sr. GD&T Professional
http://www.gdtseminars.com
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
states in part ".. within limits specified on the drawing, ..". I would interperet that as saying the limits are specified. Datums are basic.
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Do you have a specification number or document reference for this, I am very interested in the uses of the "IT" system.
Frank
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Machinery's Handbook also references B4.4 and gives a goodgraphic description of the Gagemaker's zones vs overall tolerances.
Hope that helps.
Jim
Jim Sykes, P.Eng, GDTP-S
Profile Services www.profileservices.ca
TecEase, Inc. www.tec-ease.com
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
Thank you.
Frank
RE: Limited Length 1.7.3 ASME Y14.5 M-1994
I always thought of it as kind of a: "be as careful as you can but we are not going to restrict you to a particular amount of careful, just do your best" kind of thing. I really think that is about it.
Frank