
Geometric Dimensioning & Tolerancing (GD&T) – Fundamentals
This GD&T Fundamentals training workshop introduces the student to the basics of the Geometric Dimensioning and Tolerancing of the ASME Y14.5M-2018 standard. It covers terms, definitions, and rules, followed by a close look at the purpose for each of the 14 GD&T symbols.
Geometric Dimensioning & Tolerancing (GD&T) – Fundamentals
This GD&T Fundamentals training is designed for anyone involved in part manufacturing from design through to inspection. It can benefit engineers, technicians, quality personnel, and anyone who has a need to understand, define and/or communicate tolerances on engineering drawings.

Course Objectives
- Gain a comprehensive introduction to the Y14.5M-1994, Y14.5-2009, and Y14.5-2018 standards
- Understand the proper use of Geometric Dimensioning and Tolerancing (GD&T)
- Bridge the gap between designers and measurement personnel
- Learn design and inspection technique to enhance knowledge of inspection methods
- Examine GD&T concepts from both design and inspection perspectives
Target Audience
- Engineers
- Quality Personnel
- Technicians
Agenda
- Unit 1 – Basic Principles and Definitions
- General Dimensioning and Tolerancing Principles
- Coordinate Tolerancing
- Geometric Tolerancing
- Unit 2 – Rules and Advanced Concepts
- Rules and Features of Size
- Bonus Tolerance
- Limits of Size
- Virtual Condition and Boundaries
- Unit 3 – Datums and Datum Reference Frame
- Introduction to the Datum System
- Planar Datums
- Axis and Centerplane Datums
- Datum Shift
- Datum Targets
- Unit 4 – Tolerances of Form
- Introduction to Form Tolerances
- Flatness
- Straightness (Applied to Surface Elements and to Axis or Centerplane)
- Circularity and Cylindricity
- Unit 5 – Tolerances of Orientation
- Introduction to Orientation Tolerances
- Parallelism
- Perpendicularity
- Angularity
- Tangent Plane Modifier
- Unit 6 – Tolerances of Location
- Introduction to Location Tolerances
- Tolerance of Position
- Concentricity
- Symmetry
- Unit 7 – Tolerances of Profile
- Introduction to Profile Tolerances
- Profile of a Surface
- Profile of a line
- Unit 8 – Tolerances of Runout
- Introduction to Runout Tolerances
- Circular Runout and Total Runout
Course Delivery
- In-Person Training
- Online Self-Paced Training
- Training for Teams
- Virtual Live Training
Prerequisites
- Working understanding of technical drawings
- Print Reading for Industry Course