Original title: Geological down-the-hole drill Down-the-hole drill Portable down-the-hole drill is a new type of energy-saving and efficient rock drilling equipment,rock drilling tools, which is widely used in medium and small mines,overburden drilling systems, road construction, national defense, mining dth bit ,down the hole bit, water conservancy and rock engineering. It is also an essential rock drilling equipment for open-pit mining, especially for concave-convex rugged terrain where other drilling rigs can not operate normally; The machine has the advantages of compact structure, convenient operation, fast chiseling speed, high efficiency, good disassembly of the whole machine and extremely convenient transportation. Basic parameters of portable down-the-hole drill: Borehole diameter (mm) 80-100 Drilling depth (m) ≥ 20 Swing speed (rpm) 0-84 Working air pressure (MPa) 0.5 ~ 0.7 Drill pipe size (mm) 60x1000 Air consumption (m ^ 3/min) ≥ 7 Lifting force (N) 9600 Expand the full text Features of portable down-the-hole drill: · With the motor as the rotating power, it is economical,mining drill bit, efficient and energy-saving. · Adopt straight gear transmission reducer, with large rotary torque and high drilling efficiency. · The novel overload protection makes the drilling rig run stably and reliably. The rock drilling principle of the down-the-hole drill is the same as that of the heavy rock drill. It impacts the rock (ore) intermittently and rotates continuously. The difference is that the impact mechanism of the down-the-hole drill is installed at the front end of the drill rod and dips into the bottom of the hole. The piston directly impacts the drill bit and advances continuously with the extension of the drilling hole. The down-the-hole drill is named for the fact that the impactor dips into the bottom of the hole. The impact action of the impact bit is completed by the piston in the impact catch, and the rotary action is realized by the rotary mechanism. Return to Sohu to see more Responsible Editor:. wt-dthtools.com