ISOMETRIC DRAWINGS
Pictorial (picture) Drawings are single drawings that show
more than one side of an object (3-D), therefore making
them the easiest type of drawing to understand. There are
several categories of pictorial drawings and we will focus on
the Isometric.
Isometric Drawings
• The type of pictorial we will focus on in class because it
is the most efficient/fastest and most authentic. This is
attributed to the fact that all of the isometric lines are
drawn to true size and shape.
Isometric Lines
• Y-axis is drawn vertically/90o & the X & Z-axis are drawn at 30o.
Non-Isometric Lines
• Are not parallel to the Isometric Axis & the most efficient way to create these lines is to draw
them last by connecting the ends of isometric lines
ISOMETRIC DRAWINGS
Isometric Circles
• Appear as an ellipse & are generally drawn with the aid
of an ellipse template
Line Type
Center Line (6H/0.5)
• Used to indicate the center of circles, ellipses & holes
Centering Isometric Drawings
• Is easier to do when you imagine the objects are being carved out of a solid block of material.
Now, you are now able to determine the object’s overall measurements; length, height &
width/depth and where its starting point is located.
ISOMETRIC DRAWINGS
Procedures for Centering Isometric Drawings
1. Designate the Drawing Area by drawing the Border Lines and the
Title Block.
2. Draw an “X” through the center of the Drawing Area by connecting
it’s opposite corners.
3. Draw a vertical construction line, down, from the center of the “X”.
The length of this line should be one-half of the object’s overall
height
4. Draw a 30 degree construction line, down and to the right. The
length of this line should be one-half of the object’s overall length.
5. Draw a 30 degree construction line, down, and to the left. The
length of this line should be one-half of the object’s overall
width/depth. The end of this line is your START POINT.
Site Works
Walker, John R. Exploring Drafting; basic fundamentals. N.p.: The
Goodheart-Willcox Co., Inc., 1982. Print.
Wallach, Paul. Drafting. Encino: Glencoe Publishing Co., Inc., 1981. Print.