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Thanks folks.

I would have thought that if I didn't want to permit rounding, I would specify tolerance as +/-.0050. If I would accept rounding, specing +/-.005 would imply (to me) that rounding off +/-.0054 to +/-.005 is acceptable. Splitting hairs...but I have 3 parts hung up bc of this hair splitting....

When a dwg specfies the locational tolerance of part soldered to a board as example +/-.005, is a part that measures .0051 off location out of tolerance? Do typical quality/inspection guidelines mandate that non specified significant figures are zeros as opposed to +/-.0054999. I find it hard...

My Saga continues. I'm sure the economy will be booming before this gets behind me. I'm wondering if I'm getting stuck in terminology, semantics or just beaurocratic bs. I had posted a question not long ago, stating that my dftg department is now mandating that we not put hard dimensions on...

DrawOH Not sure I follow you.... Here's a quick summary of my concern. My dftg dept wants to change ICD dims from hard dims and hard tols to Ref Dims and Ref tols since they are specified on various lower level fab dwgs. (belief is that hard dims on ICD would replicate inspection that...

Dimensions and tolerances apply only at the drawing level where they are specified." Can someone clarify what this statement means? I realize we should be inspecting a part at the level of the part in which the features are added.... Does statement mean that requirements don't flow up? If I...

I'm sorry...the term outsourced might be misleading. I work in a large company with lots of independant departments. I am in department B. If I am using assemblies from departments A, C, D I am not formally authorized to tell them how to do their job correctly. Mgmt and QA have been too...

I'm such a dope. I have read your replies many times and could not figure out how to re-post clarification. This AM, I looked again and voila...it is right there. Apologies...for my naivite'. Here's the situation that (believe it or not), is still around. I work in a large business. Aerospace...

I would like to use interface control dwgs as a mechanism to ensure that an outsourced assembly meets form/fit (dimensional) expectations. Our drafting department is advising me that they do not believe interface control dwgs should have "real" dimensions and/or tolerances. They say that...

I have an assembly of parts with defined size tolerances. Parts stack on top of one another. I must assume that tolerances for each part would fit within normal distribution. When I calculate, RSS, (taking the square root of the sum of the tolerances --> 1.00 +/- .002 .500 +/- .003 .75 +/-...

I have a part that is shaped as a parallelogram. Clearly it makes sense to have the flat surface (plan view of parallelogram) to be datum A. One edge is datum B. Can I make a 3rd edge (which is not perpendicular to Datum B due to parallelogram) the tertiary?