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As a rule, the size of the same elements of a product is applied once and representing the
number of elements on a shelf or under a shelf extension line (figure 1.16 a).

Figure 1.16 - Examples of dimensioning.

The sizes of two symmetrically placed elements (radius R3) of the product (except of holes or
chamfers) are marked one time without pointing their amount (fig.1.16 b). The dimension of
thickness of a part in one projection (plank) are marked on a foot-note-shelf (s5) as shown in figure
1.16 c.
The size of a spherical surface should be dimensioned as shown in Fig. 1.17. A sphere is
marked by the signs  or «R». If it is difficult to distinguish a sphere from other surfaces, the word
«Sphere» is written or the sign  is put before a dimension.

Figure 1.17 - Examples of dimensioning

A chamfer is a beveled edge connecting two surfaces. If the surfaces are at right angles, the
chamfer will typically be symmetrical at 45 degrees.
The chamfers are dimensioned by two linear sizes or by linear and angular sizes. The
chamfers made under the angle of 45±, are marked through a sign “X ”. Some examples of
dimensioning the chamfers are shown in figure 1. 18.

Figure 1.18 - Examples of dimensioning

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