Pneumatic percussion plunger 6" QL60 complete with a drill bit is designed for drilling boreholes 165 - 203 mm in diameter in rocky rocks with a coefficient of strength f=6...20 according to Protodyakonov (GOST 21153.1-76). Pneumatic percussionist converts the energy of compressed air into impact energy and transfers it to the drill bit, directly impacting on the curbed rock.
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