Thursday, July 29, 2010

GD&T - What Is It and Why Do I Need to Use It?

A common term in the world of metrology is Geometric Dimensioning and Tolerancing, also known as GD&T. You may hear this term often, but what does it really mean? Do you know when and where you should be using it? And exactly how does metrology equipment fit in?

GD&T is a symbolic language, developed by engineers, for engineers to communicate the design characteristics of a part clearly, consistently and unambiguously that are fundamental to its correct function, in order to enable manufacturing to know how to produce parts and for inspection to know how to verify whether or not those parts will be fit for purpose at the design stage.

GD&T is an indispensible tool, but in common with most tools it needs to be treated with respect and handled in the right way to get the most out of it. In too many cases GD&T is misapplied – causing a return to the days of trial and error, resulting in time and cost deficits instead of realizing the expected benefits.

If you are trying to guarantee the assemble-ability and/or interchangeability of components, and trying to make your manufacturing processes more cost effective, then GD&T may be for you.

Some of the main benefits of using GD&T are
 Decreased recurring costs
 Decreased overhead costs
 Reduced design changes
 Increased profits and growth
 Producing a better product
 Customer satisfaction

Portable coordinate measuring machines offer a quick and easy way of applying and checking the feasibility of GD&T schemes during development and for monitoring in-process compliance.

Watch these recorded webinars to learn the understanding of the time, engineering, and cost benefits that proper implementation of GD&T can provide.



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