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Thread: Datum representation

  1. #1
    Associate Engineer
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    Apr 2019
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    Datum representation

    Hello,

    I am now on this forum, so i hope that i'll be clear enough.
    I have the following situation (an example is attached):

    I have a simple plate with 4 holes.
    Datum A should be the 4 hatched surfaces (taken as one)
    Datum B should be formed from the 4 holes (taken together, as a pattern). So they form a TED Pattern, so they can rotate together as a set.

    My question is: The drawing is correct? (If we respect ISO standard).
    If yes, or no, can you please, tell me in which standard i can find the explanation for this type of notation?

    Thank you in advance!
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  2. #2
    Administrator Kelly Bramble's Avatar
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    Quote Originally Posted by ionut_barbuta1994 View Post

    My question is: The drawing is correct? (If we respect ISO standard).
    If yes, or no, can you please, tell me in which standard i can find the explanation for this type of notation?

    Thank you in advance!
    Yes, the datum specification is legitimate. I don't think ISO-1101 not ASME-Y14.5 will have an example with an explanation that is identical.
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

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