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Chinacoal05
The cross drill bits can be used under any rock drilling condition, it's hardly impacted by the model of drill rig and the rock performance. Generally, chisel bit is mainly used for hard rock, cross bit and button bit are mainly used for fissural rock.
It is mainly used for diging into mine laneway and blasting holes in all drilling works matched with the taper drill rod. For different rock, we choose the different alloy to extend the working life of the drill bits.
Drill Type
|
Bit diamater (D)
|
Taper
|
Whter hole
|
(d) mm
|
Part on
| |
mm
|
in
| |||||
Cross Type Bits |
32
|
1 17/64"
|
7°
|
3
|
22
|
S132-722
|
34
|
1 11/32"
|
7°
|
3
|
22
|
S134-722
| |
36
|
1 27/64"
|
7°
|
3
|
22
|
S136-722
| |
38
|
1 1/2 "
|
7°
|
3
|
22
|
S138-722
| |
40
|
1 37/64"
|
7°
|
3
|
22
|
S140-722
| |
42
|
1 21/32"
|
7°
|
3
|
22
|
S142-722
| |
43
|
1 11/16"
|
7°
|
3
|
22
|
S143-722
| |
45
|
1 49/64"
|
7°
|
3
|
22
|
S145-722
| |
50
|
1 31/32"
|
7°
|
3
|
22
|
S150-722
| |
55
|
2 9/50"
|
7°
|
3
|
22
|
S155-722
| |
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