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Geometric Dimensioning & Tolerancing (GD&T)

Based on ASME Y14.5-2009, this instructor-led introduction course simplifies GD&T learning using mostly visual material to explain basics of GD&T application, interpretation and verification as well as implications from design to manufacturing.  Exercises are used throughout the course.


This instructor-led course simplifies GD&T learning, using mostly visual material, to explain basics of GD&T application, interpretation and verification as well as implications from design to manufacturing.  Exercises are used throughout the course.  Students learn faster and retain more information with visuals and 3D objects.

The impact and importance of industry standards
Review of drawing standards and notes in practice
Coordinate tolerances and geometric dimensions
What is a tolerance zone

GD&T symbols and their changes over time
GD&T rules
GD&T in manufacturing and inspection

Straightness, Flatness, Circularity and Cylindricity tolerances

Datum systems and key factors
Datum targets
Datum referencing and simulation
Implications of material condition modifiers

Parallelism, Perpendicularity and Angularity tolerances

Position tolerance concepts and use
Understanding use of material condition modifiers
Position tolerance calculations
Concentricity versus position

Circular and total runout tolerances

Profile tolerance concepts and applications
Profile tolerance measurement

Who Should Enroll

Anyone interested in developing their career with GD & T.  Participants should understand how to read basic prints/drawings used in manufacturing before taking this class.


Instructor was knowledgeable, entertaining and informative.

Rich was very knowledgeable and had a genuine interest in if the students understood the info he presented.

An amazing teacher! Every topic had its amount of time and he explained and answered all our questions. Everything he covered, I do in my job, everything went well!

Rich made course easy to learn with a very fair pace.

Materials were useful. Used Props – not just powerpoints.

Good teaching, well done!


CCSU Downtown Campus, 185 Main Street, New Britain, CT 06051

Schedule, Cost & Contact

Spring, 2021

8:30 am – 4:30 pm


Contact:  Christa Sterling;; 860-832-2277

If you register for this course you will be required to follow CCSU protocols for being on campus. We will send you a telehealth form to complete each time you visit the building and you are required to wear a mask and maintain 6 feet social distance.

If you are a CT manufacturing company with less than 2,000 employees, not receiving other funding, you may qualify for 50% funding by the CT Dept. of Labor for eligible classes.  Complete the DOL Form and email to


Dr. Zbigniew Prusak