Roller cone bits
The following is range of roller cone bits for blast hole drilling with blow-through with air or air-water mixture. The bits are equipped with tungsten carbide cutting structure from world's leading manufacturers, sturdy elements of roller bearing carrier and hull protection, and have high drilling performance rate: stable high speed and bearing unit resistance.
| Bit diameter | Bit designation | Connection thread | |
| mm | inch | IADC code | API 7-2 |
| 171.4 | 6 ¾ | 522X | 3 ½" REG |
| 171.4 | 6 ¾ | 622X | 3 ½" REG |
| 171.4 | 6 ¾ | 632Y | 3 ½" REG |
| 171.4 | 6 ¾ | 642X | 3 ½" REG |
| 171.4 | 6 ¾ | 732Y | 3 ½" REG |
| 200.0 | 7 ⅞ | 412X | 4 ½" REG |
| 200.0 | 7 ⅞ | 422X | 4 ½" REG |
| 200.0 | 7 ⅞ | 512X | 4 ½" REG |
| 200.0 | 7 ⅞ | 522X | 4 ½" REG |
| 200.0 | 7 ⅞ | 542X | 4 ½" REG |
| 200.0 | 7 ⅞ | 612X | 4 ½" REG |
| 200.0 | 7 ⅞ | 622Y | 4 ½" REG |
| 200.0 | 7 ⅞ | 632Y | 4 ½" REG |
| 200.0 | 7 ⅞ | 722Y | 4 ½" REG |
| 215.9 | 8 ½ | 422X | 4 ½" REG |
| 215.9 | 8 ½ | 522X | 4 ½" REG |
| 215.9 | 8 ½ | 542X | 4 ½" REG |
| 215.9 | 8 ½ | 612X | 4 ½" REG |
| 215.9 | 8 ½ | 622Y | 4 ½" REG |
| 215.9 | 8 ½ | 632Y | 4 ½" REG |
| 215.9 | 8 ½ | 642Y | 4 ½" REG |
| 215.9 | 8 ½ | 732Y | 4 ½" REG |
| 215.9 | 8 ½ | 832Z | 4 ½" REG |
| 228.6 | 9 | 412X | 4 ½" REG |
| 228.6 | 9 | 422X | 4 ½" REG |
| 228.6 | 9 | 432X | 4 ½" REG |
| 228.6 | 9 | 522X | 4 ½" REG |
| 228.6 | 9 | 532X | 4 ½" REG |
| 228.6 | 9 | 542Y | 4 ½" REG |
| 228.6 | 9 | 622Y | 4 ½" REG |