Geometric Dimensioning and Tolerancing

Dates: 29th May, 2024 - 30th May, 2024 (2 days)

Duration: 2 days

Location: 7 Centre Court, Blyry Business and Commercial Park, Athlone, Co. Westmeath N37 RT29 / In-company

Accreditation: Certificate of Attendance

Full Fee: €850 (inclusive of all course materials, lunch and refreshments)

Course code: GD&T

Programme overview

Geometric Dimensioning and Tolerancing (GD&T) is the language used in design, manufacturing and quality inspection to communicate information on engineering drawings.


The GD&T Fundamentals course takes print reading and tolerances to the next level, and is perfect for companies using prints with tolerances on them. Participants will learn how GD&T is used, interpreted and applied across a part’s life cycle with a specific focus on the needs of the polymers industry.


Please note that this course is also available for in-company delivery. A subsided bespoke programme can be designed to meet your specific GD&T challenges saving your company time and money.  

Who is the course for

This programme is suitable for recent Graduate Engineers, Design Engineers, CAD Drafters, Production Associates, Machinists, Programmers, Tool Engineers & Designers, Quality Technicians, Quality Engineers, Inspection Planners, Gage Designers and Managers.


Section 1: Course Introduction

  • Course Overview
  • GD&T Pre-Test Quiz
  • What is GD&T?
  • Basic Terminology


Section 2: GD&T Framework

  • The Feature Control Frame
  • The GD&T Basics Framework

Section 3: Size Tolerances

  • Features & Material Conditions
  • Rule #1 – The Envelope Principle


Section 4: Datums

  • Datums Introduction
  • Primary Datum Controls
  • Datum Reference Frame
  • Datum Targets

Section 5: Position

  • Position Tolerance
  • Position vs. Coordinate Conversion

Section 6: Orientation (Axis/Midplane)

  • Parallelism (Axis/Midplane)
  • Perpendicularity (Axis/Midplane)
  • Angularity (Axis/Midplane)

Section 7: Material Modifiers

  • Maximum Material Condition (MMC)
  • Least Material Condition (LMC)
  • Regardless of Feature Size (RFS)

Section 8: Surface Profile

  • Surface Profile
  • Profile Modifiers
  • Profile of a Line

Section 9: Surface Orientation

  • Surface Parallelism
  • Surface Perpendicularity
  • Surface Angularity

Section 10: Surface Form

  • Straightness (Surface)
  • Flatness (Surface)
  • Circularity
  • Cylindricity

Section 11: Runout Controls

  • Circular Runout
  • Total Runout

Section 12: Derived Element Controls

  • Straightness Derived Median Line (DML)
  • Flatness Derived Median Plane (DMP)
  • Concentricity
  • Symmetry

Trainer Profile

The Sempre Group, established in 2000 as Metrology Direct Ltd., supplies measuring equipment and training to industry. Due to developing a wide profile of manufacturing partners, it is able to find the right solution for customers – be it measuring, automation, inspection management, compliance reporting, integration or lean.


Their consultants can resolve the toughest metrology challenges across all sectors, and expert service team offers support through contract measurement and system calibration and servicing. Finally, the in-house solution developers work with companies on creating new and innovative ways to increase your efficiency and boost your productivity.


Sempre work alongside many manufacturing industries to provide solutions to a variety of requirements in quality control and automation. With extensive knowledge in OEM and industries including aerospace, polymer, medical devices and automotive. It also works with more educational and research establishments, as well as industries such as food and energy.


“The engineering team in Trend Technologies are increasingly aware of the difficulties that complex drawing tolerances impose. A particular challenge is the correct interpretation and understanding of Geometric Dimensioning and Tolerancing (GD&T). Sempre were able to develop and deliver a customised training solution which addressed these gaps in our teams knowledge. The training was delivered by highly qualified experts in this field using practical examples and was complimented with the use of novel and high quality course materials. The training met all of our defined objectives resulting in the team gaining a further in-depth knowledge of this complex topic.”

Justin Wallace, Director of Tool Development (Plastics) & Innovation

Enquire Now

Book Now Course Enquiry