... drill bits SUPREME PDC blanks for coal mining bits consist of a polycrystalline diamond layer sintered with ... blanks, PDC cutters for oil/gas drilling and mining bits, PCD/PCBN cutting insert, diamond micron ... synthesizing technology. Combining the strengths of both diamond and tungsten carbide, SUPREME PDCTM possesses extremely ... at about 0.7mm Polycrystalline Diamond, PDC blanks for coal mining bits