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Drifting and tunnelling tools include rods, shank adapters, couplings and bits. We provide 7 major thread types: R25, R28, SR28, R32, SR32, SR35, and R35. With a diameter range of 38-127mm, these tools are highly compatible with button bits, cross bits, and reaming products.
| Button Bit Type | Carbide Dimension | Dimensions D | Flushing Hole | |||||
|---|---|---|---|---|---|---|---|---|
| Gauge [No.] | Gauge [mm] | Front [No.] | Front [mm] | [mm] | [in] | Front | Side | |
| Standard Button Bit | 5 | 9.5 | 2 | 9 | 43 | 1 11/16" | 1 | 1 |
| High Precision Bit | 5 | 10 | 2 | 9 | 45 | 1 3/4" | 1 | 1 |
| Heavy Duty Bit | 5 | 11 | 2 | 10 | 51 | 2" | 1 | 1 |
| Multi-Button Bit | 6 | 9 | 3 | 7 | 43 | 1 11/16" | 3 | 1 |
| Wide Diameter Bit | 6 | 10 | 3 | 10 | 57 | 2 1/4" | 3 | 1 |



