KNSH-110 BMC 40 Core Drill Bit for Versatile Rotary Drilling

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.