Wholesale mining tricone rock drill bits with discounted price from China factory. Bit Description: IADC:642 - TCI standard open bearing roller bit with gauge protection for medium hard formations with high compressive strength. Compressive Strength: 100-150 MPA 14,500-23,000 PSI Ground Description: Hard, well-compacted rocks such as :hard silica limestones,quarzite streaks,pyrite ores,hematite ores,magnetite ores,chromium ores,phosphorite ores,and granites. We can offer mining tricone rock drill bits in a variety of sizes and most of IADC Codes.The production system of Mining Industry is a complex system composed of many links. In coal mine drilling, complicated geological and hydrologic conditions, thick alluvium of topsoil, many quicksand layers, large water inflow, large well diameter, deep wellbore, and often concentrated operation scale, as well as high temperature, high pressure and high formation stress in the deep well, will greatly aggravate the severity of underground complexity and the difficulty of treatment. Some problems should be solved according to the characteristics of coal mine drilling: 1.The problem of increasing drilling speed. 2.Prevention and treatment of well collapse, diameter reduction, drilling drop and other accidents. 3.Anti-deviation technology. 4.High temperature resistance。 5.Problems of cutting tools in deep well construction. Choose the proper rocks drilling bits is very important before starting project. Rocks hardness could be soft , medium and hard or very hard, hardness of one type of rocks may be also a little different, for example, limestone, sandstoneshale has soft limestone, medium limestone and hard limestone, medium sandstone and hard sandstone , etc. In drilling project, Far Eastern  have 15 years and more than 30 countries services experience to supply the drill bits and advanced drilling soulutions for many different applications. The application including coal mine drilling,copper mining,iron ore,gold ore and so on.The various drill bits can be customized as per different rock formation becasue we have our own API & ISO certified factory of drill bits. We can give our engineer's solution  when you can supply specific conditions, such as hardness of rocks,types of drilling rig,rotary speed,weight on bit and torque.