about inclined view

1. ADAMA SCIENCE AND TECHNOLOGY UNIVERSITY
SCHOOL OF MECHANICAL, CHEMICAL AND MATERIAL
ENGINEERING
DEPARTMENT OF MECHANICAL ENGINEERING
ENGINEERING DRAWING ; MEng1102
Chapter Five
Chapter Five
Auxiliary Views
Auxiliary Views
05/07/25

2. 5.1 Introduction
 principal view of an object can be represented using the
glass box approach to surface identification. However,
below object has a surface that is not parallel to any side
of the glass box. How can we represent that surface in its
true shape and size?

3.  An auxiliary view is an orthographic view which
is projected onto any plane other than the
frontal, horizontal, or profile plane.
 Inclined and oblique surfaces do not show true
size in the standard views.
Introduction cont’d

4.  Auxiliary views are used to show the true size
and shape of an angled surface and its
features.
 Auxiliary view is projected 90 degree from the
inclined or slanted plane.
Introduction cont’d

5. 5.2. Purposes of Auxiliary Views
 Show the true size and shape of a surface.
 Show the true shape of a surface, including all
true angles.
 It is used to project and complete other views.

6. 5.3. Types of Auxiliary Views
Auxiliary Views
Based on projected surfaces
Based on auxiliary plane
Primary
Secondary
Partial
Complete

7. Auxiliary views are also classified by the
dimension shown in true size in the auxiliary view,
that is the three types of ordinary auxiliary views:
1. Depth auxiliary
is an auxiliary view projected from the front
view, and will show true depth.

8. 2.Width auxiliary
 view is an auxiliary view projected from the
profile view, and will show true width.
3.Height auxiliary
view is derived from the top or bottom view of
an object and will show true height.

9. Reference Plane (RP)
Auxiliary from Top view Auxiliary from front view
Auxiliary from side view:

10. Primary Auxiliary Views
Primary auxiliary views are views that can be
represented with their true shape and size
using single auxiliary plane which is drawn
parallel to slanted surface of an object.
Primary auxiliary views are applicable for
inclined surface of an object.

11. Primary Auxiliary Views

12. Partial Auxiliary Views
• When only the slanted surface of an object is
projected and represented on auxiliary plane,
the view obtained is called partial auxiliary view.
• It is more economical to draw partial auxiliary
views than complete auxiliary views.

13. Partial Auxiliary Views

14. Complete Auxiliary Views
• When all the surfaces of an object are
projected and represented on auxiliary plane,
the view obtained is called complete auxiliary
view.
• Complete auxiliary views are drawn when
necessary.

15. Complete Auxiliary Views

16. Steps to Draw Auxiliary Views
Step 1: Draw auxiliary plane line at any wished distance
and parallel to slanted surface.

17. Step 2: Add principal plane lines

18. Step 3: Project required lines of projection from slanted
surface to perpendicular to auxiliary plane line.

19. Step 4: Transfer the distance between either of principal
plane to endpoints of slanted surface to its new position
from auxiliary plane line in the auxiliary view.

20. Step 5: Connect the transferred endpoints in the auxiliary
view to create its final form.
This is primary partial auxiliary view.

21. To Draw Complete Auxiliary Views
 Here no edge will be missed. All visible and
invisible edges have to be shown on the
auxiliary view.
On the other hand, all corners or intersection
points of a view that consist the slanted
edges have to be projected.

22. This is primary Complete auxiliary view.

23. Example of a partial Auxiliary Views

24. Example of a Complete Auxiliary Views

25. Exercise. Draw complete auxiliary view

26. Step1. Divide the circular feature into equal parts i.e. to
4, 8, 12, 16, and project each point from the circular part
to the inclined edge. Then project each intersection points
of the inclined edge to the working auxiliary area.
Objects with circular
features:

27. Step2. Transfer each dimensions from the circular
feature accurately to the auxiliary view.

28. Step 3. Finally complete connecting the points
transferred from the circular feature view.

29. Example of circular feature.

30. Secondary Auxiliary Views
 Secondary auxiliary views are views that can be
represented using two auxiliary plane. The first
auxiliary plane is drawn perpendicular to one of the
true length of slanted surface to get edge view; and
then the second auxiliary plane is drawn parallel to
the edge view to represent the auxiliary view with its
true shape and size.

31.  Secondary auxiliary views are applicable for oblique
surface of an object i.e to find the true size of
an oblique line

32. Secondary Auxiliary Views

33. END