[Ni...] Posted August 7 Share Posted August 7 Hi, I just saw a weird true position GD&T callout that I have no idea how to interpret. I think it might have been something valid 30 years ago? but everything i've learned about GD&T tells me this makes no sense. The Feature Control Frame shows True Position | ± .010 | No datums. instead of a total tolerance, it shows ±, and it is to a plane instead of a diameter. Can someone help interpret exactly what this means? Or did the engineer who made this make a mistake? Thank You, Nixon Uruchimaweird true position.PNG Link to comment Share on other sites More sharing options...
[Ma...] Posted August 7 Share Posted August 7 I think it should be surface profile with angle setted as only basic dimension. Link to comment Share on other sites More sharing options...
[Ca...] Posted August 8 Share Posted August 8 Maybe angularity would work, too? It would need a datum, though, as would profile in order to not just be form. I think the best option would be to talk to the engineer, if you can, to determine intent. Link to comment Share on other sites More sharing options...
[Ri...] Posted August 8 Share Posted August 8 You need to be able to get your hands on "ANSI Y14.5M-1966, Dimensioning and Tolerancing" as I believe this was the last revision that had tolerancing like this. I've been unable to find it to download, but I found some libraries 1500miles away from me that have it. Haha. Best of luck. Link to comment Share on other sites More sharing options...
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