QL50-152MM DTH Drill Bit for Bore Hole Drilling  

DTH (Down the Hole) drill button bit is made by tungsten carbide buttons and steel, with special heat treatment to improve the drill bit hardness and drill bit surface is compressed to improve the drill bit wear-resistance. Combine the quality raw material and the mature produce experience makes our DTH drill bit have long service lifeand good performance in thehard formation and widely used for large scale mine (open and underground), open quarry, water-well drilling, tunnel, geothermal drilling, subway engineering drilling, roads, power stations, and other construction projects. we can supply high air DTH hammer button bit with COP34, DHD3.5, MISSION30, BR3 shank size from 90mm to 105mm; DHD340, QL40, MISSION40, SD4 shank size from 110mm to 130mm; DHD350, QL50, MISSION50, SD5 shank size from 135mm to 152mm; DHD360, QL60, MISSION60, SD6 shank size from 152mm to 203mm; DHD380, QL80, MISSION80, SD8 shank size from 203mm to 305mm with paraballistic and ballistic buttons, and dth b…