High efficiency oil-free compressor Air-end ● The first and second level materials are stainless steel； ● High rotary speed SKF bearing； ● Special coating，270℃ temperature resistance； ● Oil jacket cooling，No scaling or dew coagulation risk； ● High precision synchronous gear. Efficient suction system
[pdf] Rotary drilling machine, also known as pile driver. It is a comprehensive drilling rig, for its usage of a variety of bottom layers, the characteristics of fast forming layers, less pollution, and strong mobility.
[pdf] A rotary drilling rig works by rotating a drill string, which applies downward pressure to a drill bit that grinds the earth. Drilling fluid or air is pumped down the drill string to cool the bit, carry cuttings to the surface, and stabilize the borehole.
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