KAT DRILLING
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Drifting and tunnelling tools include rods, shank adapters, couplings and bits. We offer 7 main thread types: R22, R25, SR25, R28, SR28, R32, SR35, and R35. Diameter ranges from 38mm to 127mm. These tools are compatible with button bits, cross bits, and reaming products.
| Button Bit R28/SR28 | 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 | |
