Course Description:
This training course is intended to provide persons with limited experience with drawings, inspection, or manufacturing with an overview of typical drawing conventions and Geometrical Dimensioning & Tolerancing (GD&T). Only the most common tolerance types are shown. The class will consist of a power point presentation with class discussion. Practical examples in simple block-like geometry will be featured. Question and answer sessions will take place during the course to ensure knowledge and understanding has taken place.
Aims & Objectives
Introduce common drawing principles
Demonstrate how datums simulate conditions of use
Provide an overview of GD&T tolerance types or symbols
Work through a few common practical examples
Show that GD&T helps insure parts or assemblies will fit together
Encourage further study outside of class
Benefits to the Learner
Understand that datums determine alignment
Understand that tolerance zone values are diameters, widths, or thicknesses
Recognize the most common GD&T characteristics
Identify the difference between the GD&T categories
Be able to discuss GD&T with a basic understanding
Course Outline
Introduction: GD&T and Drawing Practice
- Views
- Assumptions
- Scale
GD&T Related Principles
- Standards and governing organizations
- Feature Control Frames
- Datums (3-2-1)
- Basic dimensions
- Tolerance Zones and Classifications
Straightness of Surface and Flatness
- Tolerances of Orientation
- Parallelism
- Perpendicularity
- Angularity
Tolerances of Location
- Position RFS
- Position with Feature MMC
Tolerances for Round Parts
- Circularity
- Cylindricity
- Circular Runout
- Total Runout
Tolerances for Oddly Shaped Parts
- Profile of a line
- Profile of a surface
