China Hard Rock Water Well DTH Drill Machine Drill Bits, Find details about China Hard Rock Bit, Hard Rock Drilling Bits from Hard Rock Water Well DTH Drill Machine Drill Bits
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 |