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Figure 2.4 – The partial views

Partial views are made to show the form and sizes of a small element of the part, for example,
a hole, a flange, ets. The partial view is made by projecting of the necessary element on one of the
basic planes of projections. Partial views are placed on the field of drawing, without projectied
connection with a basic image, but they are have to be nearer to the place of location and
correspond to the position of element on the basic image. The partial view is limited on a drawing
by a continuous wavy line or by lines of the contour of element. Partial views are marked in figure
in the same way as the auxiliary ones.

2.2 SECTIONAL VIEWS

A drawing must give the complete picture of external and internal form of a part. As it is
generally known, the internal form of an object can be shown by hatched lines. However when the
form of an object is complicated, there are a lot of hatched lines, which, crossing each other, darken
the drawing and make it difficult to read. Sectional views is used to expose the internal form of an
object.
A sectional views is a depiction of an object, relatively cut by one or several planes (fig.2.5).
The sectional views shows what is placed in a cut plane and behind it. The internal contours of a
part on a sectional views are shown by continuous main lines, as well as the visible contour of an
object. What gets in a cut plane, is called a sectional view and it is shaded. Places, where a cut plane
passes through cavities, are not shaded.

Figure 2.5 – A sectional views

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