China DTH Mining Rock Core Drill Bits Metal for Coal Mining, Find details about China DTH Hammer Bits Manufacturers, Bits Drill from DTH Mining Rock Core Drill Bits Metal for Coal Mining
head shape | head diameter/mm | shank length /mm | spline | weight/kg |
concave face | 154 | 231 | 12 | 21.6 |
flat face | 165 | 231 | 12 | 21.8 |
concave face | 171 | 231 | 12 | 23.3 |
concave face | 178 | 231 | 12 | 24.3 |
concave face | 190 | 231 | 12 | 25.5 |
concave face | 203 | 231 | 12 | 28.7 |