Geometric dimensioning and tolerancing, often referred to as GD&T, is a symbolic language used on engineering drawings and models to define the allowable deviation of feature geometry.
The introductory concepts of GD&T
A comprehensive comparison of Traditional method of tolerancing vs GD&T
A brief history of dimensioning and
tolerancing
Explanation of Symbols and their inspection
methods
A detailed look at Datums the most
important concept in GD&T
How are they created? How are they applied?
And what do they mean on the drawing?
Specify the shape of features, including:
Flatness
Circularity
Cylindricity
Straightness
Concern dimensions that vary at angles,
including:
Parallelism
Perpendicularity
Angularity
Define feature locations using linear
dimensions
Position
Concentricity
Symmetry
Define the amount by which a particular
feature can vary with respect to the datums
Circular Runout
Total Runout
describe the three-dimensional tolerance
zone around a surface:
Line Profile
Surface Profile
Overall perspective of what we've learned