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NUMA 系列 DTH Drill Bit
DTH DRILL BIT · 3 models · 20 sizes · flat / convex / concave
NUMA 系列 DTH Drill Bits – Full Specification Table
20 sizes, matched to your rock formation and rig
| Image | Model | Face | Head Ø | Shank L | Splines | Flush holes | Button shape | Edge | Center | Weight |
|---|---|---|---|---|---|---|---|---|---|---|
 | Numa100 | Convex-Concave Face | Φ254 | 375 | 10 | 2 | SP | 12XΦ19 | 8XΦ18+19XΦ16 | 89 |
| Numa100 | Convex-Concave Face | Φ275 | 375 | 10 | 2 | SP | 12XΦ19 | 8XΦ18+20XΦ16 | 93.5 |
| Numa100 | Convex-Concave Face | Φ305 | 375 | 10 | 3 | SP | 15XΦ19 | 27XΦ18+8XΦ16 | 103.5 |
| Numa100 | Convex-Concave Face | Φ325 | 375 | 10 | 3 | SP | 15XΦ19 | 27XΦ18+9XΦ16 | 112 |
| Numa100 | Convex-Concave Face | Φ350 | 375 | 10 | 4 | SP | 16XΦ19 | 32XΦ18+14XΦ16 | 121 |
| Numa100 | Convex-Concave Face | Φ400 | 375 | 10 | 4 | SP | 16XΦ19 | 40XΦ18+25XΦ16 | 146.5 |
 | Numa100A | Convex-Concave Face | Φ254 | 375 | 10 | 2 | SP | 12XΦ19 | 8XΦ18+19XΦ16 | 89 |
| Numa100A | Convex-Concave Face | Φ275 | 375 | 10 | 2 | SP | 12XΦ19 | 8XΦ18+20XΦ16 | 93.5 |
| Numa100A | Convex-Concave Face | Φ305 | 375 | 10 | 3 | SP | 15XΦ19 | 27XΦ18+8XΦ16 | 103.5 |
| Numa100A | Convex-Concave Face | Φ325 | 375 | 10 | 3 | SP | 15XΦ19 | 27XΦ18+9XΦ16 | 112 |
| Numa100A | Convex-Concave Face | Φ350 | 375 | 10 | 4 | SP | 16XΦ19 | 32XΦ18+14XΦ16 | 121 |
| Numa100A | Convex-Concave Face | Φ400 | 375 | 10 | 4 | SP | 16XΦ19 | 40XΦ18+25XΦ16 | 146.5 |
 | Numa125 | Convex-Concave Face | Φ305 | 491 | 10 | 3 | SP | 15XΦ20 | 27XΦ18+8XΦ16 | 175.5 |
| Numa125 | Convex-Concave Face | Φ311 | 49 1 | 10 | 3 | SP | 15XΦ20 | 27XΦ18+8XΦ16 | 176 |
| Numa125 | Convex-Concave Face | Φ325 | 491 | 10 | 3 | SP | 15XΦ20 | 27XΦ18+9XΦ16 | 185 |
| Numa125 | Convex-Concave Face | Φ350 | 491 | 10 | 4 | SP | 16XΦ20 | 32XΦ18+13XΦ16 | 200 |
| Numa125 | Convex-Concave Face | Φ381 | 491 | 10 | 4 | SP | 16XΦ20 | 36XΦ18+18XΦ16 | 213 |
| Numa125 | Convex-Concave Face | Φ400 | 491 | 10 | 4 | SP | 16XΦ20 | 40XΦ18+28XΦ16 | 228.5 |
| Numa125 | Convex-Concave Face | Φ445 | 491 | 10 | 4 | SP | 20XΦ20 | 48XΦ18+25XΦ16 | 266.5 |
| Numa125 | Convex-Concave Face | Φ500 | 491 | 10 | 4 | SP | 24XΦ20 | 90XΦ18 | 322 |
Product Description
NUMA series DTH bits match the hammers of the same series and come in flat, convex and concave faces; gauge and centre buttons are set by rock hardness, with spherical (SP) and conical (SBL) combinations for hard rock.
Customization & Packaging
Head diameter, spline count and button layout can be customized to drawing. Standard sizes in stock; bulk lead time confirmed on order.