ISOMETRIC PROJECTIONS CLASS NOTES FOR MECHANICAL ENGINEERING
CLASS NOTES FOR
Isometric projections is a single view projection
of a three dimensional solid. Draw three axis
at 1200. Use isometric scale for these projections.
It is 3-dimensional view of an object on a reduced
scale. Sizes on this are 81.5 % of the true sizes.
Draw the isometric view from given front view,
top view and side view. Front, top and side views in
orthographic projections contain only true dimensions.
Three lines drawn 1200 to each other are isometric axes.
Lines parallel to isometric axes are isometric lines.
Planes formed with isometric axes and isometric lines are isometric planes.
Lines OA, OB & OC are isometric axes
Lines CD parallel to OB, BF parallel to OA, DB parallel to OC are isometric lines
Planes OAFBO, OBDCO are isometric planes
Fig. Isometric Scale
This scale gives the apparent dimensions for the isometric projections. Draw two lines at 300 and 450 to the horizontal from a certain point. Laid true dimensions on 450 angle line. Draw vertical lines from these markings on 300 line. Now the dimensions obtained on the 300 line gives the isometric dimension. These dimensions are 81.9 % of the true dimensions.
Isometric Drawing Or Isometric View
Draw isometric projection with true dimensions. it is an isometric drawing or isometric view. Dimensions of isometric views are real dimensions.
Draw the 3- dimensional isometric projection with isometric dimensions. It is an isometric projection. An Isometric projection is smaller than the actual object.
Steps To Draw The Isometric Projections/Isometric View/Isometric Drawing
First draw the isometric projections of plane figures like a rectangle, square, triangle, circle, pentagon, hexagon etc.
Draw the isometric projections using plane figures. Plane figures make up a solid.
Methods Of Drawing Isometric Of Plane Figures
Methods of points
Four centers method
What will be the shape is in isometric projections for a?
It is a rhombus.
It is an ellipse.
It is a parallelogram.
It is a circle.
Draw isometric projections for
- Box type objects
Pyramid type objects
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