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2019-07(1) to obtain first-hand underground geological physical data, that is, from the borehole to remove core, core, cuttings or liquid, gas samples, if necessary from the hole wall supplement wall rock sample ore samples;(2) as a geophysical log…
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2019-07In Europe in the 1970s, with the development of urban modernization and the gradual improvement of environmental protection laws and regulations, diesel piling hammers, which were once the main driving force in the piling market, were gradua…
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2019-07Drill rod-the drill rod used in the tunnel project is to connect the drill bit and the drill tool. The drill rod commonly used in the mine tunnel project is hexagonal hollow steel and hollow round steel. The inner round diameter of hexagonal…
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2019-07The drill bit is a cutting tool used in general drills or drilling machines to cut circular holes. The basic principle of a drill bit is to rotate the cutting edge of the drill bit, cut the workpiece, and then remove drill cuttings from the…
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2019-07When digging a hole, the drill bit rotates around the vertical shaft and moves axially at the same time. The soil is cut under the action of torque and axial force of the drill bit, destroyed and crushed under the action of extrusion and ce…
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2019-07A drill bit includes a shank (1) having a tip with two cutting inserts (5, 5) located on a main plane (C-C), the cutting inserts (5, 5) having short central cutting edges oriented on a common second plane (E-E). The cutting edge forms a poi…
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2019-07It is suitable for the installation and disassembly of drill bits of various drilling machines. Installation and disassembly are convenient and reliable.1. Drill bit installationSlowly lift the drill box body, put the four legs of the drill…
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2019-07Hard alloy is generally used for drill bits for PCB drilling, because epoxy glass cloth copper clad laminates wear tools very fast. Hard alloy is made by pressing and sintering tungsten carbide powder as matrix and cobalt powder as binder. …
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