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New Release! The GD&T Hierarchy Coach is a self-paced GD&T Fundamentals training package based on ASME Y14.5-2009. The GD&T Hierarchy Coach
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Tec-Ease, Inc. is passionate about GD&T (Geometric Dimensioning and Tolerancing) and we want to help ensure you apply the Y14.5 Standard correctly. This is one reason we offer these GD&T Tips for free! If you would like additional help understanding the concepts in the Standard, we also provide some of the best GD&T training (On-site, Public Seminars, Webinars, and Computer Based). Our online store is filled with GD&T training and reference materials.

Recent GD&T Tips


June 2010 - ASME Y14.5 Is a Voluntary Standard

May 2010 - Translation Modifier

April 2010 - A Complex Feature as a Datum Feature May Constrain


Look for "Video Clip" to indicate that there is a clip of Don Day explaining that tip. 


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Since 1997 Tec-Ease, Inc. has created a GD&T Tip-of-the-Month.  These tips are listed below in alphabetical order.  To view a tip, either scroll down the list and click on the GD&T topic or click a letter group, and be taken to those topics.  If you have a suggestion for an upcoming tip, please