Representative parameters of down-the-hole (DTH) drills

Drilling diameter: 80–120 mm | Rock hardness (f): 8–16
Drilling depth: 30 m | Drill feed stroke: 1000 mm
Drill rotation speed: 0–90 rpm
Rotation motor power: 4 kW
Operating air pressure: 0.5–0.7 MPa
Operating water pressure: 0.8–1.0 MPa
Air consumption: 12 m³/min (Model 100B), 9 m³/min (Model 100D)
Water consumption: 8–12 L/min
Compatible impactor: CIR90
Maximum weight of heaviest component: 195 kg (Model 100B), 225 kg (Model 100D)
Total weight: 293 kg
Impactor model: CIR90
Compatible drill bit diameter (mm): 90, 100, 130
Outer diameter (mm): 80
Total length (mm): 795
Weight (kg): 21
Air pressure (kg/cm²): 5–7
Air consumption (m³/min): 7.2
Single impact energy (kg-m): 11
Impact frequency (blows/min): 80
Compatible drill bits: QT90B, QT90C, QT90D