ZhuZhou Better Tungsten Carbide Co., Ltd
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High Quality Taper Rock Drill 38mm 7 Button Bits For Tunnel Use
Description of Tapered dril bit
ZZbetter tapered drill bits consist of mining and tunneling two series,with higher drilling efficiency,longer service life,better powder-discharge,better wear-resistance and impact-resistance,easier bit-back performance etc.,widely used in metal mine,quarry,tunneling,hydro-electrical engineering and so on
Grade of Tapered drill bits
| Category | Grade | Density (g/cm³) | Hardness (HRA) | TRS(Mpa) |
| For geological and coal mining | YG4C | 15.13 | 90.2 | 1920 |
| YG6 | 14.96 | 91.1 | 2200 | |
| YG8 | 14.77 | 89.4 | 2350 | |
| YG8C | 14.65 | 88.2 | 2560 | |
| YK20.3 | 14.67 | 88.7 | 2380 | |
| For Oil field | YG11C | 14.35 | 87.9 | 2850 |
| YK05 | 14.80 | 90.1 | 2600 | |
| YK10 | 14.60 | 88.8 | 2500 | |
| YK25 | 14.50 | 87.6 | 3000 | |
| YK25.1 | 14.40 | 88.2 | 2800 | |
| YK50 | 14.12 | 85.0 | 2900 |
Details of Tapered drill bit
| TYPE | D | d | Degree |
| Q32 | 32 | 23 | 6º 7º 8º 11º12º |
| Q34 | 34 | 23 | |
| Q36 | 36 | 23 | |
| Q38 | 38 | 23 | |
| Q40 | 40 | 23 | |
| Q42 | 42 | 23 | |
| Q45 | 45 | 23 | |
| Q50 | 50 | 23 |
For more details about tungsten carbide buttons , please feel free to us!
