Tricone Drill Bit

One-thirds 8 1/2" Of Tricone Bit Roller Cone Bit, Use For Hard Formation, Piling Foundation Operating Parameters The roller cutters used for hard formations with high compressive strength, such as sandstone, hard shale, dolomite, hard gypsum, chert, granite etc. Cone Size 133mm Bearing Type Sealed Journal Bearing Inserts/Teeth shape Conical-ball Inserts/Teeth(Cone 1) 49*13mm Inserts/Teeth(Cone 2) 50*13mm Inserts/Teeth(Cone 3) 45*13mm Cone Material 15MnNi4Mo Arm Material