Geometric Dimensioning and Tolerance Stack Ups

CatFromHue · 15-09-2014 8:24pm #1

For the people who use GD&T and Stack ups where did you learn about them? College? Industry? On your own?

Just wondering as I learned about them on a work placement and by getting a book out of the library to help.

I studied Mechanical and Aeronautical so do Manufacturing Eng study this in uni or IT?

Darren1o1 · 15-09-2014 8:29pm

CatFromHue wrote: »

For the people who use GD&T and Stack ups where did you learn about them? College? Industry? On your own?

Just wondering as I learned about them on a work placement and by getting a book out of the library to help.

I studied Mechanical and Aeronautical so do Manufacturing Eng study this in uni or IT?

I learned on the job and recently went on a course with Jim Meadows (Chair of the ASME Y14.5). We did some symbols etc at undergrad but no real stacks or real world applications.

Turbulent Bill · 15-09-2014 8:56pm

On the job as well, though self-taught. GD&T is great for clarifying your design intent and for inspection/metrology, once you get a handle on how to use the symbols.

CatFromHue · 18-09-2014 1:47am

Yeah there's so much information that is in those little symbols yet I can't remember ever coming across them in college.

GD&T and Tol Stacks I would consider important for that actual making of things which as engineers is what we want to do. Kinda messed up that they're not included on college courses.

Turbulent Bill · 19-09-2014 9:49pm

I think there's a perception (in Ireland at least) that symbols = complexity = cost, which isn't the case. They are poorly understood in general by designers (badly thought - out tolerances, wrong values) and manufacturers (not understanding or controlling to design).

hughie1989 · 19-09-2014 11:11pm

anyone able to point out some good reading on this? never even heard of it in college and I could do with learning now!

Darren1o1 · 21-09-2014 1:52am

hughie1989 wrote: »

anyone able to point out some good reading on this? never even heard of it in college and I could do with learning now!

http://www.amazon.com/Geometric-Dimensioning-Tolerancing-Applications-Measurement-Y14-5-2009/dp/0971440166/ref=sr_sp-atf_title_1_1?ie=UTF8&qid=1411260696&sr=8-1&keywords=james+meadows
He is the chair of the ASME y14.5 board, and an excellent book.

Darren1o1 · 21-09-2014 1:54am

CatFromHue wrote: »

Yeah there's so much information that is in those little symbols yet I can't remember ever coming across them in college.

GD&T and Tol Stacks I would consider important for that actual making of things which as engineers is what we want to do. Kinda messed up that they're not included on college courses.

I covered some but not the application in my course. It is unrealistic to expect your college course to cover everything you see in industry. They give you the tools to learn and apply.

CatFromHue · 21-09-2014 8:29pm

I agree and wouldn't expect it to be covered in detail but I don't remember it even being mentioned. One or two classes in the CAD classes on this would be beneficial with out causing a major disruption to the rest of the curriculum.

Geometric Dimensioning and Tolerance Stack Ups

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