Page 99 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Fig 6

Fig 7

In some cases even though section planes passes through it is assumed as not cut. Hence, they are not hatched.
Examples of these are rivets, bolts, nuts, shafts, balls, rollers, keys and pins. (Fig 7c)
Fig 8 & 9 shows the conventional method of sectioning of external thread and internal thread.

Fig 10 to 16 shows different sections such as section on one plane, section on two parallel planes and etc. The
methods shown in these features to be applied wherever applicable.
Hatching patterns can be used as a means to broadly idnicate the material of the part/object. To differentiate
different materials in sectional view BIS laid out standards (IS:11663) on conventional representation of materials
and the same is given in the table below:
IS:11663 - 1986

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CITS : Engineering Drawing (Mechanical) - Exercise 6