Air leg rock drill is widely used in rock tunnel boring and various rock drilling operations to drill blasting holes, it is an important machine in mining, railroad, transportation, water conservancy construction and other stone projects.

Compared with pneumatic rock drill, air leg rock drill has the following advantages:

(1) Low power consumption and high energy utilization. As the high pressure oil working pressure can reach 10mpa, which is more than 20 times of the pneumatic rock drill, its energy utilization slaughter can reach 30%~40%, while the pneumatic rock drill is only 10%.

(2) High rock drilling speed. Hydraulic rock drill impact work, torque and propulsion force, braze high speed, drilling speed is about 2.5-3 times the pneumatic rock drill.

(3) Good operating conditions. Hydraulic rock drill has no exhaust noise and no air pollution caused by oil mist, improving the operating environment.

(4) The moving parts of hydraulic rock drill work in oil, good lubrication conditions.

(5) Convenient operation and strong adaptability. Hydraulic rock drill speed change is convenient, easy to realize automation, for different rock part has good performance. Because the hydraulic rock drill manufacturing and maintenance technology requirements are high, at present can not completely replace the