Plus YGZ90 rail drilling machine factory price YGZ90-rail rotary drilling machine is powered by compressed air in deep hole drilling machines. And CTC14.2 double machine or TJ25 mining drill rig drilling rig supporting disc type, mainly for underground mining operations on the blast hole drilling, can also be used for open pit and stonework projects downward or horizontal drilling blasthole. Drilling diameter 50-80mm, effective drilling depth of 30m. Cross-shaped with a diameter of 65mm alloy brazing head in F12-14 grade ore rocks, average net drilling speeds of up to 680mm / min. Model: YGZ90 Dimensions: 876 * 355 * 303 Weight: 90KG impact energy: ≥195J suitable working pressure mpa: 0.4 punctured suitable diameter mm: 50-75 water hose inner diameter mm: 19 bore depth: 30m