Applications: Apply to the anchor-network support hole drilling in coal mine, hydraulic project. Etc.
Characteristics:
1. High wear resistance and impact-resistance toughness.
2. To repeat repair & gleaning 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 be reduced.
5. Rock formation to be suitable t: F=4-12

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 coal dirlling bits, mining drilling bits,

coal mining drill bits, mining drilling bits. carbide drill bits, anchor shank drill bits, coal anchor shank drill bits, carbide coal mining drill bits,
29 52 18 M14 1.5
30 50 18 M14 1.5
32 52 22 M14 1.5
32 56 22 M12 1.75