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...
The reason I am using Position and Perpendicularity control was to control the holes location to within 2 thou and the hole needs to be perpendicular to within .0002 tenths.
Position does control perpedicularity however not tight enough so this is why I used both. I assume I am correct but was...
eliou,
There are many things which when drive the price, turn around time, qty, tolerances of the part, coatings, surface finishes, number of features and types of features, material etc....
Best thing to do is design the part for manufacturability. If you have a part which you are not sure...
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?
[ // | .01]
|
v
____________+++++++++++_______________
|...