China Quality Alloy Steel 90mm 254mm DTH Drill Bit for Rock Drilling, Find details about China DTH Drill Bits, Mining Drill Bits from Quality Alloy Steel 90mm 254mm DTH Drill Bit for Rock Drilling
head shape | head diameter/mm | shank length /mm | spline | weight/kg |
double huage button concave face | 450 | 405 | 12 | 291.5 |
double huage button concave face | 500 | 405 | 12 | 340 |
double huage button concave face | 550 | 405 | 12 | 397 |
double huage button concave face | 600 | 405 | 12 | 469 |