63
64
65
27
Fig. 24
13
64
Fig. 25
Fig. 26
69
DRILLING SPEED TABLE (RPM)
Drill Bit
Diameter
Wood Alum., Zinc., Brass
(Inches)
1/16
1/8
3/16
2430
1/4
5/16
3/8
1/2
1800
64
71
2
8
66
68
70
Fig. 27
Material
Iron, Steel
2430
1800
1300
800
Fig. 28
Fig. 29
67
2430
1800
1300
800
510
5