Basics of Isometric Drawing

1. Dr. I.I.Sayyad-Sanjivani COE Kopargaon
Unit-2
Isometric Drawing
Isometric Projection:- It is a type of an axonometric
projection (pictorial projection)
Isometric Axes
Vertical Lines remain vertical
Horizontal lines are inclined at 300
Isometric Lines:-
The angle between the isometric axes is 120 degrees if any line
is parallel to it then those are called isometric lines. Auxiliary lines
may make any angle with horizontal and oblique is not related here.
Isometric Planes:-
The planes representing the faces of the cube as well as
other. planes parallel to these planes are termed as Isometric
Planes.
Angle between Isometric axes:- 120°
The Y axis remains vertical, as in the Cartesian coordinate system.
However, the X axis and the Z axis are tilted by 30° and -30°

2. Dr. I.I.Sayyad-Sanjivani COE Kopargaon
respectively, relevant to the horizontal. Therefore, the angle between
the major axes in an isometric representation is 120°. These axes
form the basis for all isometric drawings.
How many axes an isometric has?
Isometric projection is a method for visually representing three-
dimensional objects in two dimensions in technical and engineering
drawings. It is an axonometric projection in which
the three coordinate axes appear equally foreshortened and the
angle between any two of them is 120 degrees.
Isometric Scale:-
Isometric scale = Isometric length/True length
Isometric scale = cos450
/cos300
= 0.8165 = 82%
(approximately)
Isomeric Length = 0.82 x True length
Isometric Projection length reduce by 82%
In Isometric Views you have to take original lengths

3. Dr. I.I.Sayyad-Sanjivani COE Kopargaon
Isometric views of Square
Dr. I.I.Sayyad
Sanjivani COE Kopargaon