Rock drill

Details Rock drill Rock drill

E - Fixed Constructions

21

B

255/68

E21B 10/56 (2006.01) E21B 10/36 (2006.01)

Patent

CA 1214158

Abstract A rock drill for percussion drilling comprises frontal (12,13) and gauge (14,15) button inserts, said frontal button inserts being parallel with the longitudinal axis (16) of the rock drill and said gauge button in- serts being inclined at an angle relative to said longi- tudinal axis and arranged to define the diameter of the hole drilled by the rock drill. The number of the frontal button inserts (12,13) is two and the number of gauge button inserts (14,15) is two. (Fig. 1).

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