KR Series DTH Hammer a kind of valve-equipped Low Air Pressure hammer with a singlepiston、a plate valve and a central exhauststructure. The compressed air is adopted as thedriving force. To prevent dust pollution and get abetter performance，some high-pressure water maybe added into the air for wet rock drilling.

　　It is mainly featured in:

　　1、The strong energy of single impact and the low energy consumption in rock crushing；

　　2、The weight ratio of Piston and Bit almostreaches 1:1 to provide long effective acting time，which leads to the improved efficiency in rockcrushing and the extended service life of thedrilling tool；

　　3、A good performance in central air exhaust andcuttings discharge，which reduces the repeated

　　crushing of rock，

　　4、A check vlave device is available to drill holesunder water

　　The KR Series DTH Hammer all ideal drilling tool，is widely used in such industries relating toenergy，transportation，metallurgy，building etc

　　Model

　　Length(mm)

　　Weight(Kg)

　　External Diameter(mm)

　　Bit Shank

　　Hole Range(mm)

　　Connection Thread

　　Working Pressure(Mpa)

　　Impact rate at 1.5Mpa(HZ)

　　Recommended rotation speed(r/min)

　　Air consumption(m3/min)

　　0.7Mpa

　　1.0Mpa

　　1.5Mpa

　　KR70

　　792

　　12

　　65

　　KR70

　　76

　　T42×10×1.5

　　0.5-0.7

　　15

　　15-25

　　6

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