Double-start rock auger, extended version, with round shank chisels and calibrating cutter.
Effective length - 2,500 mm
2,500 mm
Diameter - 600 - 2,000 mm
600 - 2,000 mm
No. of cutters - double-start
double-start
Pilot - none
none
Connector - Kelly box - 200 mm Spanner width
Kelly box - 200 mm Spanner width
Casing - uncased
uncased
Range of application - Medium-hard rock up to 60 MPa, fissured rock
Medium-hard rock up to 60 MPa, fissured rock
Equipment - Kelly box 200 x 200 mm, cutter bar with round shank chisels and calibration chisels; easily exchangeable hard metal wear plates and hardfacing as wear protection
Kelly box 200 x 200 mm, cutter bar with round shank chisels and calibration chisels; easily exchangeable hard metal wear plates and hardfacing as wear protection