1. Dimensioning

2. Why Dimension?  Size and  Location of all features Engineers, designers, and engineering technologists need to know

3. Dimension Completely Width

4. Dimension Completely Height Width

5. Dimension Completely Depth Width Height

6. Dimension Line Types Dimension Line Extension Line Leader Line

7. Your Turn to Practice ¼ in. scale or 4 squares = 1 in.

8. Check Your Answers

9. Where are the Missing Dimensions? ¼ in. scale or 4 squares = 1 in.

10. Here They Are

11. 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways. Incorrect

12. 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways. Correct

13. 2. Dimensions should be attached to the view that best shows the contour of the feature to be dimensioned. Incorrect

14. 2. Dimensions should be attached to the view that best shows the contour of the feature to be dimensioned. Correct

15. 3. Whenever possible, avoid dimensioning to hidden lines. Incorrect

16. 3. Whenever possible, avoid dimensioning to hidden lines.

17. 4. Avoid dimensioning over or through the object. Incorrect

18. 4. Avoid dimensioning over or through the object.

19. 5. Whenever possible, locate dimensions between adjacent views. Incorrect

20. 5. Whenever possible, locate dimensions between adjacent views. Notice this dimension is not between the views, but this is a better placement than dimensioning to the hidden line in the right side view.

21. 6. In general, a circle is dimensioned by its diameter and an arc by its radius.

22. 7. Holes are located by their centerlines, which may be extended and used as extension lines.

23. 8. Holes should be located and sized in the view that shows the feature as a circle. Incorrect

24. 8. Holes should be located and sized in the view that shows the feature as a circle. Correct