Crawler hydraulic rock drill is a hi-tech product driven by high-pressure hydraulic oil.It adopts advanced technology and novel structure,featuring low energy consumption,small size,light weight,huge impact energy,fast drilling,low noise,little vibration,trivial labor intensity.   It is widely applied to drill mines of marble,granite,metal,non-metal and coal mines.It can be applied to drill in geologic exploration as well as drill shot hole in rock mining,electric plants,railways,ports,bases,capital construction and national defense engineering.It can also be applied to control blast in old building removal in cities.   Its working efficiency is 5 to 10 times of that of pneumatic drill,while consuming 1/3 energy of the latter.It is an ideal tool to replace the pneumatic drill..QL-Z hydraulic rock drill is the ideal replacement of pneumatic drill.   Drilling performance:applicalbe to hard,semi-hard and soft rocks;drilling diameter from 36mm to 50mm;drilling speed over 800mm-1000mm/min;depth up to 9m.Its efficiency and performance overmatch foreigh counterparts.   QL-Z Series crawler hydraulic rock drill is of more advantages:      1. durable structure of the digging machine bearings      2. commutative of hydraulic motors      3. different and changalbe width of organs      4. gearbox protected with Hardox wear plate      5. There is no need to remove the drill hammer from the machine,then to realise a 360-degree turn load of drill hammer,every step of 22.5 degrees      6, the installation arm length can be changed (vertical drilling)