ZhuZhou Better Tungsten Carbide Co., Ltd
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High Hardness 11 Degree Tapered Drill Button Bits For Tunneling
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!
