ASME standard

So we have a debate going on here. if you have a datum inline with your leader line. is it the center axis of the part or the outside diameter?

If it is the axis of the part( i am and very sure it is) where in the standard is it?

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cheesiechanman over 1 year ago

Its technically both. Cant have one without the other.
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browningdmis over 1 year ago in reply to cheesiechanman

While i agree with you how do you hold the part? if you hold the part on the OD thats the datum. if you hold on the ID thats that datums. If i snap a line down the center axis of the part and call that my datum it will give me different measurements then if I only use the OD as the datum.
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browningdmis over 1 year ago in reply to cheesiechanman

While i agree with you how do you hold the part? if you hold the part on the OD thats the datum. if you hold on the ID thats that datums. If i snap a line down the center axis of the part and call that my datum it will give me different measurements then if I only use the OD as the datum.
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