The best 4wings Hard alloy coal drill bit
Match: all kinds of drill pipe Applied working places: soft rock and hard rock. Dia: 27mm-175mm
1,Hard alloy coal drill bit introduction
Hard alloy drill bits are main tools widely used in percussion drilling. We produce Chisel bit, cross bit, three-wing bit, button bit and so on. Material: high-class alloy bitCraft: forgingApplication: the drilling of limestone, moorstone, marble; the drilling operation of iron mine, goldmine and so on.
2,Hard alloy coal drill bit parameters
| NO. | specification (mm) | drill type | |||
| Dia.(mm) | contact size(mm) | ||||
| 1 | 27 | M12/8 | M14*1.5 | 2 | |
| 2 | 28 | M12/8 | F12*12 | 2 | |
| 3 | 30 | M12/8 | F12*12 | 2 | |
| 4 | 32 | M14×1.5/8 | F12*12 | 2 | |
| 5 | 34 | M14×1.5/8 | F12*12 | 2 | |
| 6 | 36 | M14×1.5/8 | F12*12 | 2 | |
| 7 | 38 | T24×5/12 | F14*14 | 2--3 | |
| 8 | 42 | T24×5/12 | F13-14 | 2--3 | |
| 9 | 45 | T24×5/12 | F13-18 | 2--3 | |
| 10 | 55 | T24×5/12 | F13-18 | 4 | |
3,Hard alloy coal drill bit photos
The best 4wings Hard alloy coal drill bit
