KNSH 41-25.7.BSr MX Core Bit for Versatile Drilling

Drill bits are designed for percussive rotary drilling of wells of various purposes with diameter from 33 to 43 mm in rocks and ores with coefficient of hardness f=6...5 MPa. f=6...20 on the scale of Professor Protodyakonov (GOST 21153.1-76) and can be used for underground drilling operations. for drilling operations underground at compressed air pressure of 0.5...0.7 MPa.