GD&T Fundamentals

Assurance Technologies, Inc Geometric Tolerancing & Dimensioning 2 Day course delivers the fundamental knowledge and skills needed for designing, reading and interpret design intent of the ASME Y14.5 Standard. This course is designed for all skill levels to become confident in the topics listed below. 

This course runs from 8:30am-5:00pm each day with lunch provided by ATI and breaks throughout the morning and afternoon.

Why attend this class? ASME Y14.5 Standard is considered the established guideline for design of geometric dimensioning & tolerancing. Understanding, communicating, applying to drawings and measuring these dimensions is critical to the engineering, manufacturing and quality assurance of your products. Which promotes success of your team. Building confidence in your knowledge and skills surrounding GD&T will further your teams abilities and strengthen your relationships with customers and suppliers.

Through lecture, in-person examples, and presentations, attendees will participate and engage throughout the entirety of the course.

Who should attend? Anyone who will be designing, interpreting, producing or measuring parts. Beginners encouraged

This course includes a GeoTol Pro 2020 Workbook and certificate of completion.

Topics Covered

Introduction to Geometric Dimensioning and Tolerancing

• General overview
• Geometric characteristic symbols
• Rules, terms and definitions
• Introduction to measurement principles, open set-up and CMM (coordinate measuring machine)

Limits of Size

• Rule #1, size controls form
• Features with & without size
• Problems with plus/minus tolerancing

How the Geometric System Works:

• Introduction to the datum reference frame
• Basic dimensions
• Introduction to position tolerancing
• MMC, LMC, RFS material condition modifiers
• Introduction to profile tolerancing

The Datum Reference Frame:

• Datums, datum features, true geometric counterparts
• Holes, slots, shafts, widths as datum features
• Connection between the theory and physical
• Constraining the 6 degrees of freedom
• Creating a complete datum reference frame

Product Plans

• Product definition drawing, manufacturing process plan, dimensional measurement plan
• Position tolerancing and verification
• Inspection and reporting of position tolerance RFS and at MMC
• Paper gage

Orientation Tolerances

• Parallelism tolerance
• Perpendicularity tolerance
• Angularity tolerance
• The hierarchy of tolerances: location, orientation, form

Practical Application of GD&T (Case study examples)

• Applying GD&T to blank drawings
• Selecting a datum reference frame and calculating tolerances