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Tricone bit is devided into two kinds because of the material: mill teeth tricone bit and TCI tricone bit. First we see two pictures
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Milled teeth tricone bit is made by steel, the material of its teeth and roller is same, the material is steel.It is always used to drill soft to medium layer; TCI tricone bit is made of steel and tungsten carbide button teeth. It is widely used to drill hard rock layer.
