Course Description:
A three day training course intended for anyone who needs to understand the theory and practice of ASME Y14.5 – 2018 Geometric Dimensioning & Tolerancing (GD&T). Students should have some knowledge of interpreting technical drawings or inspection experience. Class will alternate between a power point presentation, class discussion and practice exercises. Question and answer sessions will take place during the course to ensure knowledge and understanding. Practical examples and workbook exercises provide practice in interpreting and analyzing GD&T.
Aims & Objectives
Teach a consistent, systematic approach
Show that GD&T helps insure parts or assemblies will fit together
Demonstrate how datums simulate conditions of use
Provide robust knowledge of GD&T tolerance characteristics (symbols)
Work through practical examples
Enable confident use of GD&T on the job
Benefits to the Learner
Understand how datums determine measurement setup and relate to coordinate systems
Understand tolerance zone shapes and frameworks
Identify the difference between the GD&T categories
Recognize the GD&T characteristics (tolerance types)
Be able to read Feature Control Frames
Associate inspection equipment & procedures
Perform tolerance calculations
Improve communication
Avoid common mistakes
Course Outline
Measurement Fundamentals
Introduction: GD&T and Drawing Practice
GD&T Related Principles
- Standards and governing organizations
- Inspection Conditions
- Temperature
- Constrained vs Free State
- Conformance
- Measurement Uncertainty
- Feature Control Frames
- Datums
- Basic dimensions
- Limits on dimensions and tolerances
- Controlled Radius
Geometric Characteristics
Tolerances of Form
- Straightness
- Flatness
- Roundness
- Cylindricity
- Tolerances per unit length
Tolerances of Orientation
- Parallelism
- Perpendicularity
- Angularity
Tolerances of Location
- Position
- Position with Feature MMC
- Position with Datum MMC
- Position with LMC
- Projected Tolerance Zones
- Concentricity
- Symmetry
Tolerances of Runout
- Circular Runout
- Total Runout
Tolerances of Profile
- Profile of a line
- Profile of a surface
Composite Tolerances of Location
- Composite Tolerance Frames
- Multiple Single Frames
