Your Source for GD&T Training and Materials
 
 

GD&T Tips 


Recent GD&T Tips
January 2007 MMC May Be Applied to Datum References in a Profile Tolerance Callout - But Not to the Profile Tolerance
     
  December 2006 You Can Still Use Your Calipers, If You Really Want To.
     
  November 2006 If It Isn't Round, Use Profile of a Surface.


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 

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. 

 

 

 

 

 
 

 

Angularity

Angularity Doesn't Locate-Use Position Tolerance

Augularity Does Not Locate-Use Profile of a Surface

Basic Dimensions
ASME Y14.41 - 2003
Boundaries
Centerlines
Circularity
Coaxiality Controls
Composite Tolerancing
Concentricity
Cpk
Cylindricity Inspection
Datum
Directly Toleranced Dimensions
Exact Constraint
Feature of Size
Fixed and Floating Fasteners
Flatness
Free State
Inspection
Location Tolerances
MMC and LMC
Notes On Drawings
Origin Symbol
Parallelism
Patterns of Features
Position
Profile
Rounding Numbers
Runout 
Size
Standards Revisions 
Straightness
Symmetry/Position 
Tangent Plane
The GD&T Hierarchy Pyramid
Threads
Wall Thickness