![]() ![]() "Also, the differences between standards of different years are generally that the current one is more explicit." Do you put a date on your drawings? Does the "current" standard mean the one that was current in the year the drawing was created, the year the drawing was last revised, or the current standard that the machine shop is working to? This would worry me! This means that your vendors can apply whichever standard they choose. Nor have I ever had a vendor ask for explanation as to which standard to apply." "I've never had a vendor pull "You didn't specify how to interpret your drawings" arguement. ![]() So, I would suggest this isn't a rule that can be applied universally. The more one specifies, the more one opens themselves up to loop holes. So in regards to the standard requiring a reference to the standard on the drawing, my own experience is to leave it off all together, lest the vendor come back with one of the issues mentioned in that other thread. Also, the differences between standards of different years are generally that the current one is more explicit (as noted in the link I provided above). Nor have I ever had a vendor ask for explanation as to which standard to apply. I've never had a vendor pull "You didn't specify how to interpret your drawings" arguement. If a vendor doesn't understand the drawing, then they shouldn't have accepted the P.O. I don't work on military projects, so my perspective (above) is from a different POV. This was a pain as different sheet/billet/bar sizes were sometimes different specs and always seemed to be changing with the move from BS to ISO specs. you couldn't just say "Aluminium 6082-T6" you had to ref the releven BS/EN/ISO spec as well. For instance when specifying material you had to give the standard as well as the grade, e.g. ![]() The thread standard recomends you do this though most people don't seem to bother.īack in the UK on defence they were really strict. SCREW THREADS TO BE IN ACCORDANCE WITH ASME B1.1." ![]() I believe (with in reason) in listing all the relevant specs, for instance if you have unified threads on the drawing then somewhere you should reference ASME B1.1 either in the thread call out or a general note: I've also used NOTES: I think putting 'unless otherwise stated' in the note block 'title' just means you don't have to worry about wording each note to allow for exceptions when necessary. Generally though I don't put dates on the standards as normally you want the latest version invoked, 14.5 is an obvious exception. I believe aardvarkdw is correct about 14.5, you need to put the date because there are major differences between revisions, and of course because it says to. INTERPRET DRAWING IN ACCORDANCE WITH ASME Y14.100. DIMENSIONS AND TOLERANCES ARE IN ACCORDANCE WITH ASME Y14.5M-1994.Ģ. ![]()
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