ASME-ISO-Comparison PDF Print E-mail

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 new resources. Thanks!


Reading Engineering Drawings PDF Print E-mail

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.


Topics include:

•     The role of prints in industry
•     Types of graphic representation
•     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!

What is GD&T? PDF Print E-mail

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 Y14.5-2009, which is very 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.

ASME Y14.5-2009 Update PDF Print E-mail

The long-awaited revision to the ASME Y14.5M-1994 standard is now available. You can buy the new version, ASME Y14.5-2009, from ASME at their website, It's $169 for either the print version or a PDF version. You save the $18 shipping by ordering the PDF version, but be prepared to load some software in order to view the PDF – it's protected and only works on one computer, the physical machine that you download and open it on. So if you have a desktop and a laptop, you'll want to download the file using the same machine that you plan to access the standard on.


2009 Map of the GD&T World Now Available PDF Print E-mail

The 2009 Map of the GD&T World is available in two ways:


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

Over 3,000 people have downloaded the 1994 PDF Map of GD&T, and we figured you might as well be downloading one that is in compliance with the ASME Y14.5-2009 GD&T Standard. Feel free to print it out and use it as a resource, and contact us with any questions or comments. Thanks to Kevin Audibert for your comment!


2. Also, we've put an interactive version of the map online for you to use a quick reference: Click on Interactive Map of the GD&T World on the left menu.

Bookmark this link ( so that the map is easily available from your computer as a quick reference.



Public Seminar Offerings PDF Print E-mail

We offer the following courses as both public seminars or custom onsite workshops:

1-day Reading Engineering Drawings ($299)

3-day Fundamentals of GD&T ($1095)

2-day Tolerance Stack Analysis Using GD&T ($895)

1/2-day GD&T Overview ($250) class is also available, and is actually the first 4-hours of the 3-day Fundamentals of GD&T class - the same course manual is included (a $70 value), and now all attendees will also receive copies of ASME Y14.5-2009 (a $170 value). 

You can see all of the current seminar offerings by clicking on Scheduled Events on the top menu.

We have run public seminars in Detroit, Dallas-Ft. Worth, Los Angeles, and Boston in recent years, and we are planning on holding classes in Boston, Detroit, and Los Angeles in 2011.

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.


Online Training PDF Print E-mail

We have three online courses ready for enrollment:

GDT099: Introduction to GD&T 1994 Standard ($20) New Lower Price!

(Your $20 will also be credited toward TOL301 or GDT201 if you sign up for either course after taking the intro course.)

GDT201: Fundamentals of GD&T 1994 Standard ($100) New Lower Price!

TOL301: Tolerance Stack Analysis Using GD&T ($260)

Click Online GD&T Training on the top menu for more info or surf directly to to see course descriptions or to enroll – you can login as a guest without paying anything and take a look at the courses and prices (then scroll down for the course descriptions). The courses are all available in a self-study format, and you can enroll any time with a credit card. Call us at (586) 693-0219 if you have any problems or questions. Thanks!


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