52 Machine Drawing
dharm
d:\N-Design\Des3-1.pm5 Seventh Print
12
15
16
16
40
75
70
100
64
30
60°
22
12
(a)
16 1632
16
12
75
60°
30
15 70
40
100
22
64
12
(b)
Fig. 3.18
12
12
16
60
12
12
f^16
40
f^1620
20
R20
f 16
(a)
12 1216
40
60
R
4 HOLES,
DIA 16
12
20
12
40
R
(b)
Fig. 3.19