Headquartered in the Great State of Michigan

    ©2017 Stolter, LLC



    Experienced GD&T Training & Consulting 



    Interpreting a technical drawing is an essential skill to anyone involved with the design, manufacturing, inspection, or procurement of products. It is prerequisite to fully understanding GD&T.

    This 1-day Reading Engineering Drawings course is designed for those who need an introduction to drawings, including technicians, purchasing agents, new-hires, co-op students, interns, inspectors, quality assurance, managers and supervisors and anyone else who feels unfamiliar or intimidated by engineering drawings in the workplace.

    • The role of prints in the industry

    • Basic steps in reading a print

    • The "alphabet" of line types

    • Orthographic projection visualizing the 3D part

    • Interpreting title block

    • Notes and revisions to a drawing

    • Auxiliary and section views

    • Dimensioning and tolerancing

    • Manufacturing specifications screw threads, surface finish, etc.

    • Introduction to GD&T

    All training is in accordance with ASME standards. You will be able to practice these concepts with many class exercises and evaluation of sample drawings. Participants are also encouraged to bring drawings to the class for discussion!

    ASME Y14.5-2018 is the current standard:

    You can buy the current version of the American GD&T standard, ASME Y14.5-2018, from ASME for $230 for either the print version or a PDF version. (You save shipping charges by ordering the PDF version, but be prepared to load some software in order to view the PDF because it's protected and only works on one computer, the physical machine that you download and open it on.) 

    More Information

    To learn more about any courses we offer or to discuss a custom course, please don’t hesitate to get in touch.


    GD&T (Geometric Dimensioning and Tolerancing) is a particular way of communicating dimensions and tolerances for size, location, orientation, and form. In North America, the current standard is ASME Y14.5-2018, which is similar to ISO, DIN, JIS, and other standards used outside of the US. The basic idea of GD&T:

    Geometric: A way of thinking about and communicating dimensions and tolerances for a product. 

    Dimensioning: Calculating, recording, and communicating desired values for size, location, orientation, and form. 

    Tolerancing: Calculating, recording, and communicating acceptable ranges for size, location, orientation, and form. 


    Checkout a couple of new resources that we welcome you to download on the differences between the ASME and the ISO GD&T standards. The first is a one-pager that describes the current "families" of standards.

    The second is a two-pager that compares the similarities and differences between the current Y14.5 standard, older standards (we've found that the 1994 standard is still in wide-spread use, and many companies still have drawings created to the 1982 standard), and the ISO standard.

    Go to Free Downloads now to check out these resources. Thanks!


    The 2018 Map of the GD&T World is available in two ways:

    1. As a free PDF that you can download: Click on Free Downloads.

    Thousands of people have downloaded the 1994 and 2009 PDF Maps of GD&T, and we've updated the same map to reflect changes made to the ASME Y14.5-2018 GD&T Standard. Feel free to print it out and use it as a resource, and contact us with any questions or comments.


    2. We are in the process of updating the online map: Click on Interactive Map of the GD&T World on the left menu.

    Thanks to all who have commented! You can of course bookmark this link (www.gd-t.com/map-of-gdt) as a quick reference.


    We offer the following courses as custom onsite workshops (and every once in a while we get motivated to try to market a public workshop, so check back to see if we've got one scheduled!):

    • 3- 4- or 5-day Fundamentals of GD&T (Our Fundamentals incorporates what many companies split into two classes: "fundamentals" and "advanced" - we can pick & choose topics based on your applications.)

    • 1- or 2-day GD&T Review (Usually the review course begins with an assessment, then content areas that need review are explored. The rest of the time participants work in groups to apply GD&T to their own drawings/parts.)

    • 2- or 2.5-day Tolerance Stack Analysis Using GD&T

    • 1- or 2-day Reading Engineering Drawings 

    For more information on these workshops, see "Workshop Descriptions".

    We have run public workshops in Boston, Dallas-Ft. Worth, Detroit, and Los Angeles in the past. We haven't finalized our plans for any future public workshops, but please let us know if you'd be interested in attending a workshop and the location.  If your organization has five or more individuals who need training in GD&T or tolerance stack analysis, please contact us - we'd love to bring the training to you.