Introduction to Geometric Dimensions & Tolerances (GD&T)

Geometric Dimensioning and Tolerancing (GD&T) is the technical “language” that controls form, fit, and function on engineering drawings. This introductory course provides participants with a practical working knowledge of GD&T, enabling them to correctly interpret prints, communicate requirements, and support quality, manufacturing, and engineering decisions.

This introductory Geometric Dimensioning & Tolerancing (GD&T) course provides a straightforward, practical foundation in understanding the symbolic language used on today’s engineering drawings. Participants learn how to correctly interpret GD&T symbols, read feature control frames, and understand how geometric tolerances affect manufacturing, inspection, and quality.

This training is ideal for anyone who reads, interprets, or works directly from engineering prints.

What You’ll Learn:

• Explain what GD&T is and why it is used in modern manufacturing
• Recognize and define the 14 standard geometric control symbols
• Understand the tolerance zone shapes associated with each symbol
• Read and interpret feature control frames on engineering drawings
• Identify and apply the three material condition modifiers (MMC, LMC, RFS) at a basic level
• Understand the basics of datums and datum reference frames
• Recognize how GD&T impacts function, inspection, and cost
• Identify where additional learning is needed using a short end-of-course self-graded exam

Course Highlights:

• 12 hours of instructor-led training (Delivered over three 4-hour sessions)
• Includes the GeoTol Pro Pocket Guide (80-page reference booklet)
• Covers the 12 core geometric control symbols used on production drawings
• Learn how to read and interpret:
  • GD&T symbols
  • Feature control frames
  • Datums and datum reference frames
  • Material condition modifiers (MMC, LMC, RFS)
• Focus on real-world print reading, not theory or advanced calculations
• Designed for manufacturing, engineering, and quality professionals at all experience levels
• Maximum class size: 24 participants

Who Should Attend:

• Supervisors and technical leads who need a better understanding of GD&T to support daily decision making
• Toolmakers and machinists who work directly from prints
• CAD drafters and detailers
• Design, manufacturing, and process engineers
• Quality engineers, technicians, and inspectors

Course Requirements:

• Number of Sessions: This course includes 3 half day sessions.
• Time: Sessions typically run from 8:00 AM – 12:00 PM.
• WEDnet PA eligible: Yes. This course is generally reimbursable under the WEDnet PA state training grant at up to $2,000 per employee (subject to eligibility, funding, and compliance). Our on-staff grant specialists can assist with the application process and help you identify additional funding options to reduce your training investment.