I have found that some of our customers are moving over to GD&T however they seem to not understand it completely. They are actually making the location of the holes >2.5 times "tigher". For example on some holes they used to call out +/- .005 in cartesian coordinates, they now use true...
What is the actual layer that "grows" 1/2 into the part and 1/2 out?
I have heard and read off the internet that it is..
Aluminum oxide
Aluminum hydrate
Aluminum hydroxide
Which is it??
So please view the section drawing of a round disk with a raised portion in the center. Hopefully it is semi clear?
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