Engineering

Isometric Drawing In Technical Drawing

In technical drawing, isometric drawing is a very useful technique to show a part in all aspects. But sometimes, isometric drawing is mixed with the isometric projection. You must know the difference between the isometric projection and the isometric drawing. Here we explain the general characteristics of isometric drawing in technical drawings.

What Is The Isometric Drawing?

The difference is the isometric drawing from the isometric projection is the lengths of the lines and other features that constitute the part. In ısometric projection, the lines and edges are foreshortened. This foreshortened effect shortens the lengths by around 20% in isometric projection. But in isometric drawing, these lengths are drawn without shortening. The lengths are drawn 100% in the isometric drawing. So, the part that isometrically drawn is bigger than the isometrically projected parts.

Why Isometric Drawing Is Used?

The use of the isometric drawing comes from the easiness. Shortening all lengths of a complex part in isometric projection can be hard compared with the isometric drawing.

Like in the isometric projection, isometric axes are used in isometric drawings. According to the shape and illustration of the part, the orientation of the isometric axes can be selected. Different isometric drawing orientations of the axes(Image Source: FREDERICK E. GIESECKE, SHAWNA LOCKHART, Technical Drawing With Engineering Graphics 15th Ed., Pearson, Pg.85).

You can see some of the isometric axis orientations that show a basic prismatic part in different views.

In the technical drawing principle, it is a very common application that the isometric view of the part is shown as the fourth element, besides the other three standard views of the part.

Conclusion

These are the general information about the isometric drawing method in technical drawing.

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