Standard Practice for Centering a Hole 4

[JoeC.]

I have an issue of figuring out what the best way to dimension this type of drawing would be.

If I have a hole in a middle of a rectangle, which I don't really care much about it's total width (say 10+-1), but I do want the hole to be in the center of the that rectangle regardless of how big or small it is within a tolerance of +-0.1.

How do I go about giving dimensions so that the hole is still centered regardless of the rectangle width?

 

[dgallup]

You could use the width of the rectangle (D in graphic above) as the datum. Don't need any basic dimensions. I always found symmetry a very easy to understand concept, you could explain it to any operator on the plant floor. Try to explain true position to the same person and their eyes glaze over.

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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

 

[Burunduk]

I have never seen (a proper) symmetry application for the control of a cylindrical hole. What this "symmetry" tolerance zone looks like?

 

[cr7]

JoeC. how did you end up doing it?