1. Introduction to Geometric Dimensioning &Tolerancing for ME/EE/Ceng 264

2. Design Intent
Material
Level of quality
Relationships

3. Fundamental Philosophy of GD&T (Why GD&T)
It is a standard (very similar to ISO)
It helps communicate design intent
It could help save money

4. Datum
A theoretically exact point, axis, or plane derived from the true geometric counterpart of a specified datum feature. A datum is the origin from which the location or geometric characteristics of features of a part are established.

5. Datum Feature
An actual feature of a part that is used to establish a datum

6. Datum Feature Simulator
A surface of adequately precise form (such as a surface plate, a gage surface, or a mandrel [or a CNC machine axis] contacting the datum feature(s) and used to establish the simulated datum(s).

7. Simulated Datum
A point, axis, or plane established by processing or inspection equipment, such as the following simulators: a surface plate, a gage surface, or a mandrel

8. Position tolerance theory
From Foster, Geometrics III, Addison-Wesley, 1994.

9. Position tolerance theory
From Foster, Geometrics III, Addison-Wesley, 1994.

10. Position tolerance theory
From Foster, Geometrics III, Addison-Wesley, 1994.

11. Position tolerance theory
From Foster, Geometrics III, Addison-Wesley, 1994.

12. Position tolerance theory
From Foster, Geometrics III, Addison-Wesley, 1994.

13. Position tolerance theory
From Foster, Geometrics III, Addison-Wesley, p201

14. From ASME 14.5, 1994.

15. From ASME 14.5, 1994.

16. From ASME 14.5, 1994.

17. From ASME 14.5, 1994.

18. Possibilities for **

19. Possibilities for **

20. From ASME 14.5, 1994.

21. From ASME 14.5, 1994.

22. From ASME 14.5, 1994.

23. From ASME 14.5, 1994.

24. Significance of Datums