B1.5 ANSI / ASME B1.7M ANSI / ASME B1.8-1 ANSI / ASME B1.12 ANSI / ASME. requirements, starting with ASME Y14.100. ASME is the national standard now, referenced by U.S. ASME has taken over the engineering stuff, such as Y series. As tight of tolerances that these designs require - optics design - I wonder how it could have been done RIGHT all these years without consistent datum references. Table 1.5 The summary of ASME codes combined with ANSI standards ( ANSI / : to. They pretty much washed their hands off of the US national standards. Many of these parts have been manufactured, delivered, inspected, and used based on these non-GD&T drawings for decades, and they don't want to mess it up now. They are afraid that changes to drawings might give the opportunity to have vendors re-quote prices for the same parts because the drawing now calls out GD&T. They are inclined to continue using the ANSI Y14.5M-1982 spec on the few drawings that do callout GD&T even to its limited use without changing any conventions. He said If you want use to use the newest standard then teach use this 2000 spec (i.e Y14.100-2000) not the out-of-date Y14.5M-1994 standard, and he caught me off guard. The lead designer for the department took me to task after I corrected their older drawings for errantly defined feature control symbols. I feel silly for not doing my homework before asking the question. Indeed ASME Y14.5M-1994 is the current standard.
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