| 型 号 Model | 钻头直径 Bit Diameter | 套管尺寸 Casing Size | 花 键 Shank | ||||||
| 打开 Expanded | 闭合 Retracted | 内径 I.D. | 外径 O.D. | ||||||
| inch | mm | inch | mm | inch | mm | inch | mm | ||
| JF90 | 4.92 | 125 | 3.54 | 90 | 4.01 | 102 | 4.49 | 114 | 90A,90B,930,M3 |
| JF115 | 6.10 | 155 | 4.53 | 115 | 5.00 | 127 | 5.47 | 139 | 110,940,M4 |
| JF140 | 7.40 | 188 | 5.51 | 140 | 6.02 | 153 | 6.61 | 168 | 110,940,M4 |
| JF165 | 8.46 | 215 | 6.54 | 166 | 7.13 | 181 | 7.63 | 194 | 150 |
| JF190 | 9.37 | 238 | 7.48 | 190 | 8.11 | 206 | 8.62 | 219 | 150 |
| JF215 | 10.86 | 276 | 8.46 | 215 | 9.45 | 240 | 10.0 | 254 | 150/170 |
| JF235 | 11.54 | 293 | 9.29 | 236 | 10.0 | 254 | 10.75 | 273 | 150/170 |
| JF240 | 11.54 | 293 | 9.49 | 241 | 10.24 | 260 | 10.75 | 273 | 150/170 |
