FIELD: mining.
SUBSTANCE: drilling bit for rocks for percussion drilling contains a head made with possibility of securing at end of the drilling element of the drilling assembly, and having diameter exceeding diameter of the drilling element. The bit head has at face end along the drilling direction multiple inserted rods, distributed over the bit head, and made with possibility of contact with the material to be destructed, at least one of inserted rods has shank out of base material, containing particles of first material build-in the cementation phase, at that the first material is more hard then cementation phase. The shank at least partially contains a support section, its material is harder than cementation phase, at that at least one of the inserted rods is made with possibility of rotation relatively its own axis of symmetry.
EFFECT: improved operation parameters of percussion drilling bit.
33 cl, 11 dwg
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