
KNSh-165 QL 60 Crown Bit for Impact Rotary Drilling in Hard Rock
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Description
Drill bits are designed for percussive-rotary drilling of wells of various purposes in rocks and ores with coefficient of strength f=6...5 MPa. f=6...20 on Professor Protodyakonov's scale (GOST 21153.1-76) and may be used for carrying out drilling works by the open method on drilling machines at pressure of compressed air 2,0...2,5 MPa.
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