Double-start rock auger, extended version, with round shank chisels and calibrating cutter.
No. of cutters - double-start
double-start
Pilot - none
none
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
