Without complicating it to discuss multiple holes, how would the single hole be treated. Every single example the datum has a 0 tolerance. I have not seen a single example with a table showing anything where the datum has it's bonus. It should also be getting 1/2 the bonus from the -B- and -C- datums.ĭoes that mean it gets 1/2 of the. 030 from the first box of the feature frame. 030MMC to A,, Īssuming the hole is at the minimum diameter. Now a reference frame for the hole(size +.006-.000) in question is. This gives the feature a maximum positional tolerance of. 060mmc to datum A, and it's diameter tolerance is +.006/-0. 013 with the largest passing bore.ĭatum b bore has a positional tolerance of. 007mmc to datum A, and it's diameter tolerance is +.006/-0. Currently have a copy ofĪSME Y14.5M-1994 but doubt any better clarification in the 2009 standard.ĭatum c bore has a positional tolerance of. I'll make the question clear, and please feel free to point it out. I'm sure I've simply missed the exact answer I am hunting for.
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