Page 1
Presentation Name Course Name
Unit # – Lesson #.# – Lesson Name
Project Lead The Way, Inc.
Copyright 2010 1
Auxiliary Views
Auxiliary Views
• Auxiliary view
– Orthographic projection of an angled surface
– Appears foreshortened in a typical multi-view
drawing
• Auxiliary views are used to show true
size and shape of angled surface features
Foreshortened Surfaces
• Foreshortened
surfaces on multi-
view drawings are
unclear and
inaccurate
representation of
size or shape
• View should not be
dimensioned
Foreshortened Face
Foreshortened Surfaces
• Auxiliary view is
perpendicular to an
angled surface
• Shows true size
and shape of the
surface features
e.g., hole in
surface as shown
Page 2
Presentation Name Course Name
Unit # – Lesson #.# – Lesson Name
Project Lead The Way, Inc.
Copyright 2010 2
Types of Auxiliary Views
• Three types of
ordinary auxiliary
views
1. Depth auxiliary
2. Height auxiliary
3. Width auxiliary
Types of Auxiliary Views
• Depth auxiliary view derived from front or
back view to show true depth
• Width auxiliary view derived from side
view to show true width
• Height auxiliary view derived from top or
bottom view to show true height
Creating Auxiliary Views
• Step #1
– Multi-view drawing containing canted surface
– Example will be more clear with auxiliary view
of canted surface on front view
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Page 3
Presentation Name Course Name
Unit # – Lesson #.# – Lesson Name
Project Lead The Way, Inc.
Copyright 2010 3
Creating Auxiliary Views
• Step #2
– Determine true dimension to show on
auxiliary view
– Identify reference edges on existing view
– Draw appropriately spaced construction lines
where auxiliary view will be drawn
– Construction lines are reference lines parallel
to angled edge
Edge View of
Reference Plane
Creating Auxiliary Views
• Step #3
– Draw construction lines outward from each
corner of view
– Auxiliary view will be a 90° rotation of view
– Lines must be perpendicular to angled edge
– Identify relationship between object corners
and construction line intersections
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Page 4
Presentation Name Course Name
Unit # – Lesson #.# – Lesson Name
Project Lead The Way, Inc.
Copyright 2010 4
Creating Auxiliary Views
• Step #4
– Draw object lines to connect corners that
share a visible edge
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3,4
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6 8,7 9
• Auxiliary view is projected from
front view
• Shows true size and true shape
of the angled surface
• If hole were located on surface,
then it could be properly
dimensioned
Partial Views
• Foreshortened object faces can be difficult
to draw because of complex shapes or
curves
• Short break lines and partial views
simplify difficult curves on foreshortened
faces while maintaining complete shape
description
Page 5
Presentation Name Course Name
Unit # – Lesson #.# – Lesson Name
Project Lead The Way, Inc.
Copyright 2010 5
Partial Views
short break lines
