Rock Drilling Bits are made from grade hard alloy and special steel, generally matched with the light-duty rock drill, to drill the rock hole within diameter of 50mm. The drill tools are used in metallurgy mine, geological exploration, water conservancy construction, electricity, traffic, tunnel, quarry, national defence stone project etc.|
Diameter
|
Button Number
|
Angle
|
Length
|
Weight
|
Package
|
|
|
mm
|
inch
|
(pieces)
|
(°)
|
(mm)
|
(kg)
|
box
|
|
28
|
1 1/8 ''
|
4
|
7°/11°/12°
|
65-69
|
0.20
|
50pcs/box
|
|
30
|
1 3/16 ''
|
4~6
|
7°/11°/12°
|
65-69
|
0.20~0.30
|
50pcs/box
|
|
32
|
1 1/4 ''
|
4~7
|
7°/11°/12°
|
65-69
|
0.20~0.30
|
50pcs/box
|
|
34
|
1 11/32 ''
|
4~8
|
7°/11°/12°
|
65-69
|
0.22~0.30
|
50pcs/box
|
|
35
|
1 3/8 ''
|
7~8
|
7°/11°/12°
|
65-69
|
0.22~0.40
|
50pcs/box
|
|
36
|
1 13/32 ''
|
4~8
|
7°/11°/12°
|
65-69
|
0.30~0.40
|
50pcs/box
|
|
38
|
1 1/2 ''
|
4~8
|
7°/11°/12°
|
65-69
|
0.30~0.40
|
50pcs/box
|
|
40
|
1 9/16 ''
|
4~8
|
7°/11°/12°
|
65-69
|
0.30~0.42
|
50pcs/box
|
|
41
|
1 5/8 ''
|
4~8
|
7°/11°/12°
|
65-69
|
0.30~0.42
|
50pcs/box
|
|
42
|
1 21/32 ''
|
4~8
|
7°/11°/12°
|
65-69
|
0.30~0.46
|
50pcs/box
|
