Drifting and tunnelling tools include rods, shank adapters, couplings and bits.
We have mainly 11 threads: SR22,SR25,R25, SR28,R28,SR32,R32,SR38,R38 and T35. Diameter: 38-127mm,They can be used with button bits, cross bits and reaming products.
Advantages:
1. The drill bit body is made of 50R61 steel
2.The head carbide is YK05 or T6
3.Diameter:36mm-51mm
4.Package:in wooden case or in carton.
5.Productivity:50000pcs/ month
DRIFTING AND TUNNELING-R28/SR28 |
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R28/SR28 Button bit
Button bit | Carbide dimension | Dimensions D | Flushing hole | |||||
Gauge | Front | |||||||
[No.] | [mm] | [No.] | [mm] | [mm] | [in] | Front | Side | |
| 5 | 8 | 2 | 7 | 36 | 1 13/32″ | 1 | 3 |
5 | 8 | 2 | 8 | 38 | 1 1/2″ | 1 | 3 | |
5 | 9 | 2 | 7 | 38 | 1 1/2″ | 1 | 1 | |
5 | 9 | 2 | 9 | 41 | 1 5/8″ | 1 | 1 | |
5 | 9.5 | 2 | 8 | 43 | 1 11/16″ | 1 | 1 | |
5 | 10 | 2 | 9 | 45 | 1 3/4″ | 1 | 1 | |
5 | 11 | 2 | 9 | 48 | 1 7/8″ | 1 | 1 | |
| 6 | 8 | 2 | 8 | 43 | 1 11/16″ | 2 | 0 |
6 | 9 | 2 | 9 | 45 | 1 3/4″ | 2 | 0 | |
| 6 | 9 | 3 | 8 | 45 | 1 3/4″ | 3 | 1 |
6 | 9 | 3 | 9 | 48 | 1 7/8″ | 3 | 1 | |
6 | 10 | 3 | 9.5 | 51 | 2″ | 3 | 1 | |
