7665 rock drill is mainly used for roadway construction, both head-hole drilling, but also played with the roof vertical bolt holes can be used for mixing and loading of resin bolt early. 7665 retains the two-stage rock drill air leg rock drill of the fundamental characteristics of conventional air-leg rock drill high 2 ~ 2.4m. 
 The common face of rock drill hole drilling only, can not face drilling and roof bolt holes vertical, so 7665 rock drill in a number of coal mines in the well-loved. 
 7665MZ dual-stage air-leg rock drill eight height specifications. To 1.6 ~ 3.0m high qualified small section of tunnel drilled bolt holes, specially equipped with five short specifications. Selection, 7665MZ series dual-stage air-leg rock drill machine full stretch height slightly higher than the roadway height. There are three common models, suitable for medium and large-section tunnel. To a machine, drilled bolt holes, also drilled hole face; can achieve a hole, drill bolt holes that need to set brazing operations, face hole drilling can significantly reduce the number of legs moving gas, and even without moving the gas leg. 
 7665MZ rock drill is simple, suitable, lightweight, machine short, large travel, both up and air-leg rock drill rock drill features fully reflects the two-stage air leg rock drill of the fundamental characteristics. 
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