GD&T Articles

by Saif Afridi on December 1, 2020.

ASME recently released the much-awaited Y14.5 2018 GD&T Standard! Find out what has changed from the 2009 edition and what’s you need to know… The rise of Geometric Dimensioning & Tolerancing has been incredibly phenomenal. A primitive concept in the 1940s, GD&T is now an internationally acclaimed system that has become the industry standard for…

by Seth Elder on November 12, 2020.

The video below is in response to a question that we received on our question line from Ash.   The question is as follows: “I regularly see drawings where spacing between a pair of holes is critical, but not so much the position of the pair as a whole.  Often the dimension to the first hole…

by Crystal Bemis on November 6, 2020.

Everyone understands the simple plus or minus tolerances of coordinate dimensioning. So why use GD&T instead? Here are four reasons that GD&T has an advantage over coordinate tolerancing… What are the advantages of GD&T vs. Coordinate Tolerancing? Coordinate dimensioning is easy to read and understand. It’s the way most of us have learned to create…

by Seth Elder on October 29, 2020.

The video below is in response to a question that we received on our question line from Jeff.   Jeff asked us if concentricity is always equal to half of the runout value.  ASME Y14.5 defines concentricity as the requirement where the derived median points of all diametrically opposed elements must align with the axis of…