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| Brand Name | ROSCHEN |
| Certification | ISO |
| Model Number | JTK48 |
JTK48 Impregnated Diamond Core Bits For Drilling Broken Abrasive Sandstone
Introduction:
The main technical parameters of impregnated diamond core bits include diamond type, size, concentration and diamond grade, matrix hardness and crown shapes etc. If users can make rational selections according to the rock formations, then they can get satisfied drilling performance on various formations with different hardness. To avoid excessive bit wear, diamond tungsten carbide inserts are used on both sides of the waterway and the larger diamonds are used on the inside and outside.
Specifications:
| STANDARD SET DIMENSIONS FOR DIAMOND CORE BITS AND REAMING SHELLS | ||||||||||||
| Core Barrel Designation |
Core Bit | Core Bit | Reaming Shell | |||||||||
| Outside Set Diameter | Inside Set Diameter | Set Diameter | ||||||||||
| Maximum | Minimum | Maximum | Minimum | Maximum | Minimum | |||||||
| Inches | mm | Inches | mm | Inches | mm | Inches | mm | Inches | mm | Inches | mm | |
| EWT(EXT) | 1.475 | 37.46 | 1.465 | 37.21 | 0.91 | 23.11 | 0.9 | 22.86 | 1.49 | 37.85 | 1.48 | 37.59 |
| IEWS | 1.475 | 37.46 | 1.465 | 37.21 | 1 | 25.4 | 0.99 | 25.15 | 1.49 | 37.85 | 1.48 | 37.59 |
| EWG | 1.475 | 37.46 | 1.465 | 37.21 | 0.85 | 21.59 | 0.84 | 21.34 | 1.49 | 37.85 | 1.48 | |
| AQ | 1.88 | 47.75 | 1.87 | 47.5 | 1.067 | 27.1 | 1.057 | 26.85 | 1.895 | 48.13 | 1.885 | 47.88 |
| AQIK | 1.88 | 47.75 | 1.87 | 47.5 | 1.206 | 30.63 | 1.196 | 30.38 | 1.895 | 48.13 | 1.885 | 47.88 |
| ATW(ADB-GM) | 1.88 | 47.75 | 1.87 | 47.5 | 1.198 | 30.43 | 1.188 | 30.18 | 1.895 | 48.13 | 1.885 | 47.88 |
| AWT(AXT) | 1.88 | 47.75 | 1.87 | 47.5 | 1.286 | 32.66 | 1.276 | 32.41 | 1.895 | 48.13 | 1.885 | 47.88 |
| ATK34(AW34) | 1.88 | 47.75 | 1.87 | 47.5 | 1.325 | 33.66 | 1.315 | 33.4 | 1.895 | 48.13 | 1.885 | 47.88 |
| AXC(AWC3) | 1.895 | 48.13 | 1.855 | 47.88 | 1.067 | 27.1 | 1.057 | 26.85 | 1.895 | 48.13 | 1.885 | 47.88 |
| JTK48/LTK48 | 1.88 | 47.75 | 1.87 | 47.5 | 1.394 | 35.41 | 1.384 | 35.15 | 1.895 | 48.13 | 1.885 | 47.88 |
| BQ | 2.35 | 59.69 | 2.34 | 59.44 | 1.438 | 36.53 | 1.428 | 36.27 | 2.365 | 60.07 | 2.355 | 59.82 |
| BQ3 | 2.35 | 59.69 | 2.34 | 59.44 | 1.325 | 33.65 | 1.315 | 33.4 | 2.365 | 60.07 | 2.355 | 59.82 |
| BQTK | 2.35 | 59.69 | 2.34 | 59.44 | 1.606 | 40.79 | 1.596 | 40.54 | 2.365 | 60.07 | 2.355 | 59.82 |
| BXB(BWC3) | 2.365 | 60.07 | 2.355 | 59.82 | 1.438 | 36.53 | 1.428 | 36.27 | 2.365 | 60.07 | 2.355 | 59.82 |
| BWG(BX) | 2.35 | 59.69 | 2.34 | 59.44 | 1.659 | 42.14 | 1.649 | 41.88 | 2.365 | 60.07 | 2.355 | 59.82 |
| NQ | 2.97 | 75,44 | 2.96 | 75.18 | 1.88 | 47.75 | 1.87 | 47.5 | 2.985 | 75.82 | 2.975 | 75.57 |
| NQ2 | 2.97 | 75.44 | 2.96 | 75.18 | 2 | 50.8 | 1.99 | 50.65 | 2.985 | 75.82 | 2.975 | 75.57 |
| NQ3/NQTT | 2.97 | 75.44 | 2.96 | 75.18 | 1.78 | 45.21 | 1.77 | 44.96 | 2.985 | 75.82 | 2.975 | 75.57 |
| NWG(NX) | 2.97 | 75.44 | 2.96 | 75.18 | 2.16 | 54.86 | 2.15 | 54.61 | 2.985 | 75.82 | 2.975 | 75.57 |
| NMLC | 2.97 | 75.44 | 2.96 | 75.18 | 2.052 | 52.12 | 2.042 | 51.87 | 2.985 | 75.82 | 2.975 | 75.57 |
| HQ | 3.77 | 95.76 | 3.755 | 95.38 | 2.505 | 63.63 | 2.495 | 63.38 | 3.79 | 96.27 | 3.775 | 95.89 |
| HQ3/HQTT | 3.77 | 95.76 | 3.755 | 95.38 | 2.411 | 61.24 | 2.401 | 60.99 | 3.79 | 96.27 | 3.775 | 95.89 |
| PQ | 4.815 | 122.3 | 4.795 | 121.8 | 3.35 | 85.09 | 3.34 | 84.84 | 4.835 | 120.81 | 4.82 | 122.43 |
| PQ3 | 4.815 | 122.3 | 4.795 | 121.8 | 3.275 | 83.19 | 3.265 | 82.93 | 4.835 | 122.81 | 4.82 | 122.43 |
| TT46/LTK46 | 1.816 | 46.12 | 1.806 | 45.87 | 1.394 | 35.41 | 1.384 | 35.15 | 1.828 | 46.42 | 1.818 | 46.17 |
| T2-46 | 1.816 | 46.12 | 1.806 | 45.87 | 1.253 | 31.82 | 1.243 | 31.56 | 1.828 | 46.42 | 1.818 | 46.17 |
| T2-56 | 2.21 | 56.12 | 2.2 | 55.87 | 1.647 | 41.82 | 1.637 | 41.56 | 2.222 | 56.42 | 2.212 | 56.17 |
| T2-66 | 2.603 | 66.12 | 2.593 | 65.87 | 2.04 | 51.82 | 2.03 | 51.56 | 2.615 | 66.42 | 2.605 | 66.17 |
| T2-76 | 2.997 | 76.12 | 2.987 | 75.87 | 2.434 | 61.82 | 2.424 | 61.56 | 3.009 | 76.42 | 2.999 | 76.17 |
| T2-86 | 3.391 | 86.12 | 3.381 | 85.87 | 2.828 | 71.82 | 2.818 | 71.56 | 3.403 | 86.42 | 3.393 | 86.17 |
| T2-101 | 3.982 | 101.14 | 3.97 | 100.84 | 3.3 | 83.82 | 3.29 | 83.56 | 3.994 | 101.44 | 3.984 | 101.19 |
| T6-86 | 3.391 | 86.12 | 3.381 | 85.87 | 2.643 | 67.13 | 2.633 | 66.88 | 3.406 | 86.51 | 3.394 | 86.21 |
| T6-H | 3.897 | 98.98 | 3.882 | 98.6 | 3.115 | 79.13 | 3.105 | 76.88 | 3.912 | 99.36 | 3.902 | 99.11 |
| T6-101 | 3.982 | 101.14 | 3.97 | 100.84 | 3.115 | 79.13 | 3.105 | 78.88 | 3.996 | 101.51 | 3.984 | 101.21 |
| T6-116 | 4.575 | 116.18 | 4.56 | 115.8 | 3.667 | 93.13 | 3.657 | 92.88 | 4.59 | 116.59 | 4.575 | 116.21 |
| T6-131 | 5.165 | 131.18 | 5.15 | 130.8 | 4.257 | 108.13 | 4.247 | 107.88 | 5.18 | 131.59 | 5.165 | 131.21 |
| T6-146 | 5.755 | 146.18 | 5.74 | 145.8 | 4.847 | 123.13 | 4.837 | 122.88 | 5.772 | 146.61 | 5.757 | 146 |
| f you have any special size requiments, please contact us via roschen@roschen.com . | ||||||||||||
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