Total Runout putting limits on dimensional tolerance
Total Runout putting limits on dimensional tolerance
(OP)
Hi, I have checked some previous questions about this matter in this forum but anyway I would like to be sure.
Please, could someone confirm my following doubt and interpretation?
Is it possible to have a dimensional tolerance (diameter ) of 0,005 mm and a total runout of 0,02 mm for the same feature in relation to the data displayed? I have received a drawing (see just a sketch attached as reference) from our main site, but for me it makes no sense.
Thanks and regards.
Roberto
Please, could someone confirm my following doubt and interpretation?
Is it possible to have a dimensional tolerance (diameter ) of 0,005 mm and a total runout of 0,02 mm for the same feature in relation to the data displayed? I have received a drawing (see just a sketch attached as reference) from our main site, but for me it makes no sense.
Thanks and regards.
Roberto





RE: Total Runout putting limits on dimensional tolerance
"Know the rules well, so you can break them effectively."
-Dalai Lama XIV
RE: Total Runout putting limits on dimensional tolerance
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Total Runout putting limits on dimensional tolerance
You maybe mistaking it with some other control(s).
I recommend looking on the following newsletter, that makes distinction very clear: http://www.mechsigma.com/newsletters/2003_10_Newsl...
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: Total Runout putting limits on dimensional tolerance
RE: Total Runout putting limits on dimensional tolerance
Roberto
RE: Total Runout putting limits on dimensional tolerance
Will it make sense if the datums change a place in the frame to put [B] as primary and [A] as secondary?
I've seen the similar sample Fig9-7 in ASME Y14.5-2009
RE: Total Runout putting limits on dimensional tolerance
----------------------------------------
The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Total Runout putting limits on dimensional tolerance
Datum B constrains 2 rotation and 1 location degree of freedom, but in the initial FCF the one location isn't relevant to controlling the feature.
This means if A is primary there is no need for B, but if B is primary there are still 2 location degrees of freedom that need a constraint. Those can be supplied by using [B|A] which ignores the rotation degrees of freedom from A in favor of those from B, and adds the location degrees of freedom from A to give each of the degrees of freedom in the feature a way to be measured.
[B|A| is typically used if there [B] is a bolted flange that will force the face to be the primary alignment.
RE: Total Runout putting limits on dimensional tolerance
RE: Total Runout putting limits on dimensional tolerance
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NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: Total Runout putting limits on dimensional tolerance
RE: Total Runout putting limits on dimensional tolerance
RE: Total Runout putting limits on dimensional tolerance
RE: Total Runout putting limits on dimensional tolerance
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: Total Runout putting limits on dimensional tolerance
Dave, I think the simultaneous requirements rule has changed since 1994. It used to apply to features located using basic dimensions (thus position and profile). Now the standard says it applies to position AND only features of size are referred to. If you know of somewhere else in the standard that profile is supported please let me know cause I can't find it. I don't think I like this new definition if it proves to be true.
John Acosta, GDTP Senior Level
Manufacturing Engineering Tech
SSG, U.S. Army
Taji, Iraq OIF II
RE: Total Runout putting limits on dimensional tolerance
Here
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: Total Runout putting limits on dimensional tolerance
John Acosta, GDTP Senior Level
Manufacturing Engineering Tech
SSG, U.S. Army
Taji, Iraq OIF II
RE: Total Runout putting limits on dimensional tolerance
Thanks CH.
John Acosta, GDTP Senior Level
Manufacturing Engineering Tech
SSG, U.S. Army
Taji, Iraq OIF II