Mine YGZ90 type rock drill 2013 new offer, YGZ90 rig model is complete, independent rotary rail drilling machine, factory direct sales, service, rail independent rotary drilling machine parts, Shanxi YGZ90 drilling machines, Shaanxi YGZ90 YGZ90 rail independent rotary drilling machine working principle: the impact of some After cutting open the manipulation of compressed air through the trachea into the shank body outdoor air by the end of the piston rod alternately with gas cylinder of compressed air into the front chamber and a rear chamber to improve for high-speed reciprocating piston motion, constantly against the solder tail. YGZ90 rail independent rotary drilling machine corresponding technical parameters; first shock was 225J working pressure 0.63Mpa 225J working pressure 0.4 ~ 0.5Mpa Applicable drill pipe is 32mm (standard 1.1M / root) drill specifications are 50,55, 60,65,70 five kinds tracheal diameter (shock part) 38MM pawl portion plumbing pipe diameter is 25mm diameter 19mm diameter 50 ~ 80mm hole solder tail size 38 * 97mm piston stroke 98mm bore 125mm machine weight 95kg Dimensions 876 * 355 * 303mm (L * W * H) Contact: Maguo Jing Contact: 18615651196 landline number :0531-86109500 QQ: 1879692311