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  1. pylfrm

    Effects of tolerances applied to datum features

    When a datum feature is referenced without use of LMB or MMB modifiers, in some scenarios the tolerances applied to that datum feature can affect how the datum reference frame is derived according to ASME Y14.5-2009. For examples, see Fig. 4-29 (a), Fig. 4-30 (a), and Fig. 4-31 (a). This seems...
  2. pylfrm

    Interpretation of projected position tolerances at MMC

    Imagine a drawing that defines a part with two holes, each having a length of 8 mm, specified as follows: hole 1: diameter 6 +/- 0.1 THRU positiondiameter 0.4 (M) (P) 32ABC hole 2: M6 X 1 - 6H THRU (pitch diameter 5.350 - 5.500) positiondiameter 0.4 (M) (P) 32ABC Drawing interpretation is per...
  3. pylfrm

    Anodic Coatings per MIL-A-8625 Type II and Type III

    Hello folks, I am looking for some answers to a series questions, possibly rather unusual, about anodizing aluminum. Any insight will be appreciated. Is it possible for a coating in accordance with MIL-A-8625 Type III to also meet the requirements of MIL-A-8625 Type II Class 2? If not...
  4. pylfrm

    Unequally disposed profile tolerance

    Another thread (thread1103-401386) has inspired me to ask something I've wondered about a few times in the past. Consider the following unequally disposed profile tolerance per ASME Y14.5-2009: profile v1 (U) v2 And the following three cases: 1. v2 is between v1 and zero, inclusive...

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