Drill bits are designed for percussive rotary drilling of boreholes
of various purposes with diameter from 85 to 360 mm in rocks and ores with coefficient of hardness f=6...7 MPa.
strength f=6...20 on the scale of Professor Protodyakonov (GOST 21153.1-76) and can be used for drilling works as open cut.
for drilling works both open and closed (underground) on the machines
NKR-100, BP-100, SBU, URB-2A2 and other machines at compressed air pressure of 0.5...0.7 MPa.
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