Page 146 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Fig 3

1 inch BSW has 8 threads per inch.
Therefore the pitch = 1/8 inch = 3 mm approximately.
H = 0.968P
Radius of curve = 0.137P
Draw the thread profile to the enlarged scale 10:1. Assume the dimensions suitably and complete the drawing.

Exercise 8.4

Draw the profile of square thread (φ 30 mm & pitch 6 mm) (Fig 4)

Fig 4

Depth of thread = 0.5P
Thread angle = 90°
Draw profile of square thread to a suitable magnified scale according the space available.
Exercise 8.5, 8.6 & 8.7

Draw the profiles of Acme, buttress and knuckle threads by referring figures 2,3 & 4 of Exercise different types of
thread Ex.15. Use suitable enlarged scale according to the availability of space in the workbook sheet.
Exercise 8.8

Draw the conventions of external and internal thread with edge views. (Fig 5)
Draw the conventions of threads as shown above also indicate the type and size of thread as mentioned in the
dimensioning technique exercise.

Fig 5

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CITS :Engineering Drawing (Mechanical) - Exercise 8