DOWN THE HOLE drilling is a kind of big diameter borehole drilling by extending the impacting power to the bottom of the hole. With high straightness, clean hole wall, good rigidity of drill pipe and hammer, without high axial thrust, no restriction of drilling depth and low cost, DTH drilling tools are widely used in open-pit mining.

High  Air Pressure DTH Hammer with foot valve:

• Valveless air distribution. More reliable.
• Simple design of the piston, long life.
• More efficient energy transfer,faster drilling speed,lower air consumption and lower oil consumption.
• Fewer internal parts, simple structure,longer life,Less failure and easier to maintain because all the parts are heat treated.
• Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multistep thread .

High  Air Pressure DTH Hammer without foot valve:

• Out of the trouble of foot valve fracture and expansion and contraction.
• Lower energy consumption and higher impact frequency.
• The drilling speed is 15%-30% higher than the same type with the valve
• Simple structure ,reliable parts, long life , easy and cheap maintenance.
• Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.