Position of CD&T callout

[looslib]

One of our designers has done some drawings and he has done the dimension of the hole with tolerance pointing to one hole. To another hole in the same bolt circle arrangement, he has put the true position callout. In some cases they are opposite sides of the drawing view. While I don't think this is in violation of ASME Y14.5-2018, I have not seen any examples where the dimension and the GD&T callout are separated like he is doing.
I am of the opinion that it is clearer that they be together.
Looking for opinions if this practice is acceptable or should the dimension and GD&T be together?

"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[CheckerHater]

Personally, I think it should be bearable if both call-outs include quantity - N times diameter, N times position, pointing to the same hole circle.

Even that should probably be limited to condition when bulky "all-including" call-out doesn't fit well on the drawing.

"For every expert there is an equal and opposite expert"
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[drawoh]

looslib,

For me, the tolerance of the hole and the positional tolerance all specify the requirements for the hole. They should be applied together. Separating them sounds confusing to me.

--
JHG

 

[pmarc]

10.2.1.2 Use of Feature Control Frame. A feature
control frame is added to the notation used to specify
the size and number of features. See Figures 10-2
through 10-4, which show different types of feature
pattern dimensioning.

Some may say the practice used by the designer does actually violate the standard. But at the same time others may point to some examples in the very same section 10 of the standard (such as figs. 10-29 or 10-52) where the statement from para. 10.2.1.2 is not true, therefore cannot be treated as a hard rule, even though these latter examples are rather pretty special use cases of position tolerancing.

 

[3DDave]

It's a Feature Control Symbol, FCF. As long as it is clear what feature it is controlling there isn't a problem. It is possible to have multiple holes of multiple diameters controlled with a single FCF as long as the holes it applies to are identified.

ASME Y14.5-2018, paragraph 6.5, (b) attaching a leader from the frame pointing to the feature or an extension line relating to the feature