Drill Bit Our Companyar Protection System Rock Drill bits are exposed to the most aggressive wear form It s a complex wear system with 80 abrasion 10 erosion and 8 impact The abrasion are by fine and medium particles The tips of the teeth needs extensive protection provided only by quot preformed Tungsten Carbide quot in optimum size proportion to ensure high density deposit After extensive field trials ESAB formulated Cobalarc 4 for Tricone Rock Roller Bit protection Over the years Cobalarc 4 has reduced drill bit consumption by 75 Its unique formulation controls dilution and prevents any deformation of metallurgical deterioration in the base alloy