Question for inspectors
Question for inspectors
(OP)
For those who have to inspect and approve parts with illegal or impractical GD&T, how do you deal with it? I regularly see designs with illegal GD&T and yet we have parts made, delivered, accepted by our QC and put into use. I asked our inhouse Mfg advisor about this and he is convinced that there is no one answer, thinks that the handling depends on what company is making what part and even then you get a different answer depending on what person you contact there.
Is there some kind of work around in these cases? Just curious about how that is handled.
Is there some kind of work around in these cases? Just curious about how that is handled.





RE: Question for inspectors
The problem is that when an issue does rear itself down the road, the bogus GD&T on the print could be a point of liability. Remember that a drawing is a legal contract to make a part to the given specifications, and if the drawing is ambiguous or wrong, that will point dthe finger of liability to the company whose name is in the title block. There are a few stories of prints being hauled into a courtroom and having a GD&T expert give testimony about the validity of certain callouts.
So I would say that any goofy or illegal GD&T should be brought up, but I know it depends on the timeline of the project. Interesting to hear what others will say about this.
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Question for inspectors
As JP said, I also hear the "making the same part to this drawing for years" excuse.
John Acosta, GDTP S-0731
Engineering Technician
Inventor 2013
Mastercam X6
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Question for inspectors
Frank