Specification Of NUMA Series High Pressure Drill Bit
| NUMA | Head shape | Diameter | Number of vents | NO X button diamter | weight (KG) | ||
| mm | Toothed | Gauge | Front | ||||
 NUMA100  NUMA100A | Convex concave | 275 | 2 | Round Button | 12XØ19 | 8XØ18+19XØ16 | |
| Convex concave | 305 | 3 | Round Button | 15XØ19 | 27XØ18+8XØ16 | 110 | |
| Convex concave | 350 | 4 | Round Button | 16XØ19 | 32XØ18+14XØ16 | ||
 NUMA120  NUMA120A | Convex concave | 350 | 4 | Round Button | 16XØ20 | 32XØ18+13XØ16 | |
| Convex concave | 450 | 4 | Round Button | 20XØ20 | 48XØ18+25XØ16 | ||
| Convex concave | 500 | 4 | Round Button | 24XØ20 | 90XØ18 | ||
 NUMA125  NUMA125A | Convex concave | 381 | 4 | Round Button | 16XØ20 | 36XØ18+15XØ16 | |
| Convex concave | 394 | 4 | Round Button | 16XØ20 | 36XØ18+23XØ16 | ||
We can design and manufacture according to customers requirement of the bit diameter, the NO.of air holes,
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