Oblique Drawings

PRIN. OF DRAFTING AND SHOP DRAWINGS - OD1641 - LESSON 1/TASK 3

Oblique Drawings

Oblique drawings are technical pictures that can be drawn with instruments. They

are easier to draw than isometric drawings, but they contain more inherent visual

distortion.

Figure 55 compares oblique, isometric, and pictorial drawings of the

same object and illustrates the visual differences among the three.

FIGURE 55.

COMPARISON BETWEEN

ISOMETRIC, OBLIQUE, AND

PICTORIAL DRAWINGS.

The basic reference system for oblique drawings is shown in figure 56 (on the

following page). The most distinct characteristic of the oblique axis is the 90,

relationship between the left-hand axis and the vertical axis. Because of this 90,

relationship, the front view and all surfaces parallel to it are almost identical

to the front view of an orthographic drawing. This makes it very easy to transfer

information between the two different front views.