I discuss two changes made between the 1994 and 2009 versions of ASME Y14.5. These changes are not mentioned in appendix A of ASME Y14.5-2009. The changes apply in 2018 as well.
The first is the requirement to have basic dimensions and tolerances in associated feature control frames have the same number of decimal places, the second is the placement of datum feature symbols on feature control frames.
Негізгі бет Complaining about ASME Y14.5 Changes 1994-2009
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