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This series of PDC diamond drill bits is specially designed for drilling hard rocks of IV-VII hardness categories. These bits use cutters with increased impact and abrasion resistance. The specially designed bit profile and optimally selected number of blades provide maximum cutter overlap, protecting the bit from premature wear. To improve stable bit behavior at the bottomhole, a spiral blade shape is used. The set of design solutions embodied in these bits allows achieving maximum speed, penetration, and excellent controllability when drilling wells. China. Main. Country of origin. Bit diameter: 94 mm. Bit rotation speed: 60 rpm. Weight: 3.5 kg. Bit type: diamond. Flushing (blowing): combined. Number of blades: 3 pcs.