Rock Drilling Rig

A rock-drilling rig similar to the one shown in Figure 2.13 operates with a 250 kg gearbox sliding up and down the mast. When the drill string sinks into the ground during the drilling operation, the drill operator unfastens the drill string from the gearbox and raises the gearbox to the top of the mast to insert another length of drill pipe.

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Qinhuangdao Eastsun Rock Drill Equipment Co., Ltd.

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Qinhuangdao Eastsun Rock Drill Equipment Co., Ltd is a provincial high-tech enterprise, which dedicates to the inheritance, R&D of underground rock drilling application technology. The founder has been specializing in research and manufacture of drilling equipment for more than 30 years. Eastsun provides DF series rock drill jumbos, core parts such as helical swing cylinder and others. Eastsun is the authoritative unit for R&D and manufacture of tunnel drilling equipment in China. The products are widely used in mines, tunnels, cement, metallurgy, machinery manufacturing, petrochemical industry, military and other major projects at home and abroad, exports to more than 10 countries and regions such as USA, Australia and Chile. The helical swing cylinder, which has won the national invention patent, serves China's 094 class strategic nuclear submarine with excellent performance and is well received by users.

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