KNSH-105 BSH Sp Crown Drill Bit for Rotary-Impact 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.