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GD&T Tips 

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
January 2010 Spheres as Datum Features Constrain 3 Translations
   


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

December 2009 Center Planes as Datum Features Constrain 3 Degrees of Freedom
   
November 2009 Use Composite Tolerances to Control the Feature-to-Feature Relationship


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 

Don't miss the new tips as they become available! 

Check out our GD&T Glossary and Resource Center


A - C D - F G - I J - L M - O P - R S - U V - Z

Actual Mating Envelope  

These GD&T Tips came from Don's years of experience in using and teaching GD&T. 

The GD&T Hierarchy Pyramid is designed to be a quick reference. 
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Angularity
Angularity Does Not Locate Video Clip
ASME Y14.5-2009  Video Clip
Basic Dimensions
ASME Y14.41 - 2003
Boundaries
Centerlines
Circularity
Coaxiality Controls
Composite Tolerancing Video Clip
Concentricity
Circular Runout  Video Clip
Corporate Addendum Video Clip
Cpk
Cylindricity Inspection
Datum
Directly Toleranced Dimensions
Drawing “PreviewsVideo Clip
Exact Constraint
Extensions of Principle
Feature of Size Video Clip
Feature Control Frame Video Clip
Features Have Axes Video Clip
Fixed and Floating Fasteners
Flatness
Free State
Inspection
Location Tolerances
MMC and LMC
Notes On Drawings
Orientation Video Clip
Origin Symbol
Parallelism
Pick Your GD&T Tools Wisely Video Clip
Patterns of Features
Perpendicularity Video Clip
Position
Profile
Rounding Numbers
Runout 
Rules
Rule 1 Video Clip
Don’t Be Tricky with GD&T  Video Clip
Size
Slots Video Clip
Standards Revisions 
Straightness
Symmetry/Position 
Tangent Plane
The GD&T Hierarchy Pyramid
Threads
Tolerances Video Clip
Wall Thickness

 

 

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