Geometric Dimensioning and Tolerancing

28 hours

This class is an introductory course. Some knowledge of basic blueprint reading is desirable. Subjects covered will be: feature control frame, symbology used, review of types of tolerancing; datums, types and uses; material conditions, their meaning and symbology; tolerances of form to include the symbology, shape of tolerance zones and examples; tolerances of orientation including symbology, shape of tolerance zone and examples; runnout tolerances, symbols, tolerance zones; location tolerancing, comparison of conventional vs. true position tolerancing, bonus tolerances, effect of material condition modifiers on locational tolerances; some simple drafting problems using GD & T.

• Introduction
  · Reasons for use of GD&T
  · Symbology
  · Feature Control Frames
  · Types of Tolerancing
• Datums
  · Definitions
  · Use of Datums
  · Types of Datum
  · · Datum Planes
  · · Datum Reference Frames
  · · Datum Targets
  · · Multiple Datums
  · · Datum Axes
  · · Datum Precedence
• Material Conditions and Symbols
  · MMC
  · LMC
  · RFS
  · Rule #1, Boundary of Perfect Form
• Tolerances of Form
  · Straightness: Symbols, Tolerance Zone, Examples
  · Flatness: Symbols, Tolerance Zone, Examples
  · Circularity: Symbols, Tolerance Zone, Examples
  · Cylindricity: Symbols, Tolerance Zone, Examples
• Profile Tolerances
  · Profile of a Line: Symbols, Tolerance Zone, Examples
  · Profile of a Surface: Symbols, Tolerance Zone, Examples
  · Bilateral and Unilateral Profile Tolerances
  · Profile of Coplanar Surfaces
• Tolerances of Orientation
  · Parallelism: Symbols, Tolerance Zone, Examples
  · Perpendicularity: Symbols, Tolerance Zone, Examples
  · Angularity: Symbols, Tolerance Zone, Examples
  · Effect of Material Condition on Orientation Tolerances
• Tolerances of Runnout
  · Circular Runnout: Symbols, Tolerance Zone, Examples
  · Total Runnout: Symbols, Tolerance Zone, Examples
• Combination of Geometric Tolerances
  · Symbology Used in Combination
• Location Tolerances
  · Position Tolerancing Generalities
  · · Conventional or Rectangular Tolerancing
  · · Position Tolerancing
  · · Position Tolerancing at MMC, LMC, RFS
  · Position Tolerancing of Certain Features
  · · Locating Multiple Features
  · · Locating Slotted Holes
  · · Locating Coaxial Features
• Drafting Problem Using GD & T