Page 228 - Engineering drawing from first principles using AutoCAD

Technical drawings for industry 221

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PART 4
COMPONENT

Figure 10.20 (continued)

Cast iron bracket

Figure 10.9 shows the details of a cast iron bracket in first angle projection and we are
required to draw the following views:

• the given plan view;
• a sectional elevation on plane XX;
• an end elevation looking in the direction of arrow Y.

Solution notes
The section plane cuts through the base and vertical web at right angles, so these details
are cross-hatched. It also slices through the two thin webs which support the 32mm
diameter boss on the right-hand side. The convention is not to cross-hatch thin webs and
their outlines are defined as shown. Note that the pitch between the 45° lines on the
cross-hatching is the same for all areas as we are only drawing one component. The cross-
hatching also covers the MIO thread to the minor diameter.
Figure 10.10 shows the solution in first angle, while Figure 10.11 shows the solution in
third angle.

Complete assemblies

Examination questions in engineering drawing invariably involve the draughtsman in
assembling components together and drawing two or three views in projection. One