Constructive disposition in drilling tool for pneumatic DTH hammer type

摘要

Constructive disposition in drilling tool for pneumatic DTH hammer type.It is described a constructive disposition in drilling tool for pneumatic hammer type DTH (down the hole) which comprises a drill or drill bits starting with two sides of cutting, and the first face cutter (10) prepared in the extreme of drill, and presents a The world cylindrical shape with the surface provided with channels (11) which extend between the top and bottom.And the upper face with the provision of inserts (101) and holes (12) aligned with the channels (11) for the passage of air, and a second face of the cut cylindrical shape (20) positioned concentric and adjacent to the underside of the first face cutter (10) and a measure of larger diameter than the pr Imeira cutting face (10).The second face of the cut (20) with the surface provided with channels (21) extending between the upper and lower, and upper face with the provision of inserts (201) and holes (22) aligned with the channels (21) for the passage of air.