1. Chapter 14 Axonometric Projection
(Pictorial Drawing)

2. Given This!

3. Draw this!

4. Types of Axonometric Projection
Isometric – has equal foreshortening along each of the three axis directions
Dimetric – has equal foreshortening along two axis directions and a different amount on the third axis
Trimetric – has different foreshortening along all three axis directions

5. Types of Axonometric Projection

6. Isometric Projection
The projections of the edges of a cube in isometric projection make angles of 120 degrees with each other

7. Isometric Projection
Lines of an isometric drawing that are not parallel to the isometric axes are called nonisometric lines
These lines are not equally foreshortened

8. Isometric Projection
Isometric scales can be used to draw correct isometric projections
All distances are approximately 80% of true size

9. Isometric Drawings
Isometric drawings, unlike isometric projections, are drawn using the full length measurements of the actual drawing and lacks foreshortening
The isometric drawing is about 25% larger than the isometric projection

10. Iso Paper

11. Making an Isometric Drawing

12. Sketch an Isometric Drawing

13. Iso Paper

14. SOLUTION

15. Sketch an Isometric Drawing

16. Iso Paper

17. SOLUTION

18. Hidden Lines and Centerlines
Hidden lines are omitted unless they are needed to make the drawing clear
Center lines are shown if they are needed to indicate symmetry or if they are needed for dimensioning

19. Angles in Isometric
Angles project true size only when the plane containing the angle is parallel to the plane of projection
An angle may project to appear larger or smaller than the true angle depending on its position

20. Circles in Isometric
If a circle lies in a plane that is not parallel to the plane of projection, the circle projects as an ellipse
Ellipses can be constructed using offset measurements

21. Ellipses in Isometric
Approximate ellipses can be constructed from arcs

22. Drawing Ellipses

23. Drawing Isometric Cylinders

24. Irregular Objects

25. Irregular Objects

26. Curves in Isometric

27. Screw Threads in Isometric
Parallel partial ellipses equally spaced at the symbolic thread pitch can be used to represent screw threads

28. Arcs in Isometric

29. Intersections

30. Spheres in Isometric

31. Isometric Sectioning
Isometric sectioning is useful in drawing open or irregularly shaped objects

32. Isometric Dimensioning
Isometric dimensions are similar to dimensions on multiview drawings but should match the pictorial style

33. Exploded Assemblies

34. Piping Diagrams

35. Sketch an Isometric Drawing

36. Iso Paper

37. Solution

38. Sketch an Isometric Drawing
Front view given should be the rear view of the Isometric Drawing
Scale 1:4

39. Iso Paper

40. Solution