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GD&T Question

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Qcprick63

Qcprick63

Industrial
Joined
Mar 7, 2023
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34
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US
Not a fan of this type of callout.
I ran a circle at the far edges of both bores then recalled into a 3d line . Put a few more circles on both diameters and asked for runout back to the 3D line. I guess I report the highest runout value? Is that correct or is there a better way??
PXL_20240314_112714492_002_zzsubl.jpg
 
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I am not comfortable with the length of the A and B datums relative to their diameter and proximity. But yes I would approach it as you are - build a best fit 3D line across the entirety of A and B and report each bore runout to that 3D line. I'm not enouhg of a GD&T wonk to explain which rule this violates other than common sense.

Or put A and B as a circle at the middle of their features and make A-B using those two circle center points.

Regardless, I would clarify on the inspection reports which method was used.
 
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sorry, it wasn't getting any responses in this catagory.
 
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