AAA Drafting Blog

A SolidWorks designer talks about stuff related to CAD and mechanical design

Sunday, October 17, 2010

New Geometric dimensioning and tolerancing GD&T page

Just this week I had a call from a gentleman in the USA about a geometric dimensioning and tolerancing course he was taking at a local community college. The course was being held by webinar and the instructor provided no means whatsoever for the students to ask questions. It was just lecture and listen.

By all accounts, geometric dimensioning and tolerancing, GD&T, is only used by at most 20% of the manufacturing companies in North America, despite the fact that it is supposed to be the national standard for drawing and dimensioning.

Its a tough subject to learn because it seems many instructors seem to dwell on esoteric definitions of terms and characteristics and say very little about how GD&T is actually used.

In my course at Metro College in Toronto, I try to put some real life examples into the mix. Its surprising how obvious and easy GD&T becomes when you use it to communicate a real world issue.

One of the primary reasons for GD&T is to make parts fit together in an assembly. I have kept that in mind when putting together my own geometric dimensioning and tolerance page.

In the future I hope to put my own webinar together, and you be sure there will be plenty of real time communication between teacher and student. In the end is that not what GD&T is about, - Improving communication ?


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