Supreme Quality Coal Bit-Two Wings Roof Bolt Dril Bit
Specifications
1. Low price and supreme quality2. High wear resistance
3. Rock formation: 4
4. Long drill life
Supreme Quality Coal Drill Bit
Applications:
Apply to the ancher-network support hole drilling in coal mine, hydraulic project,etc.
Characteristics:
1. High wear resistance and impact-resistanct toughness;
2 To repeat repair & greaning are not necessary; long drill life;
3 High efficiency could be promoted sharply in penetration of high-medium hard rock formation;
4 Labour intensity could could be reduced.
5 Rock formation to be suitable t: F=4
Specification:
Colliery Drilling Tools |
Main Standard(mm) |
|||
D |
H |
L |
M |
|
Thread joint |
27 |
44 |
17 |
M14×1.5 |
27 |
54 |
17 |
M12×1.75 |
|
28 |
54 |
20 |
M12×1.75 |
|
29 |
52 |
18 |
M14×1.5 |
|
30 |
50 |
18 |
M14×1.5 |
|
32 |
52 |
22 |
M14×1.5 |
|
32 |
56 |
22 |
M12×1.75 |
|
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