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GD&T/Tooling Balls

GD&T/Tooling Balls

GD&T/Tooling Balls

(OP)
Hello All,

I have a question about GD&T related to tooling balls, in particular the reference dimensions to the center of the tooling ball; in the case attached should these be reference of basic dimensions? The attachment is a simple representation of what I have going on, please feel free to criticize the other aspects. Thanks again!

RE: GD&T/Tooling Balls

On the positional tolerance for the tooling ball, add the letter S before the diameter symbol. This changes the tolerance zone from a cylinder to a sphere. Also, you might want to consider locating both features with respect to the same datum reference frame since they appear to be related.

John Acosta, GDTP Senior Level
Manufacturing Engineering Tech

RE: GD&T/Tooling Balls

(OP)
powerhound,

Thanks for the feedback, I was originally pointing towards the hole rather than the ball, but that makes more sense to just to have it on the ball itself since it matches with the function. I assume the the ".687" reference will have to change to a basic dimension?

RE: GD&T/Tooling Balls

Yes, the .687 should be basic.

John Acosta, GDTP Senior Level
Manufacturing Engineering Tech

RE: GD&T/Tooling Balls

(OP)
Thanks powerhound, making sense...

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