Tolerance and significant digits
Tolerance and significant digits
(OP)
Let's say I have a print with +/- 0.003" tolerance on a dimension. Typically with 3 significant digits, one would round numbers like 0.0034 down to 0.003. My question is should a +/- 0.003" tolerance be interpreted as +/- 0.0034" due to significant digit rounding?





RE: Tolerance and significant digits
Where does .0034" come from?
The ASME Y14.5 standard states that a tolerance of .003" means .003000000 etc. If you measured something .0034" out of specification, it should be rejected.
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JHG
RE: Tolerance and significant digits
So no you don't round in the way you're suggesting, at least to ASME. +/-.003" equates to +/-.00300000000000000000000...0. +.0034 would be out of limits.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Tolerance and significant digits