hard rock roller tricone drill bit

8 1/2" IADC Code 537 617 437 Tri-Cone Hard Rock Roller Tricone Drill Bit For Granite Non-sealed Roller Air Bearing Mining Roller Cone Bits This series bits are non-sealed Roller Bearing bits that are cooled and cleaned by air with fast drilling speed and good strength which are used for the development of open-pit coal mines, iron mines, and non-ferrous metal mines. The thrust bearing is made of materials with high wear resistance, high hardness, and high temperature

Non-sealed Roller Air Bearing Mining Roller Cone Bits Tricone Roller Rock Bit 6 12 14 5 12 Tricone Drill Bit This series bits are non-sealed Roller Bearing bits that are cooled and cleaned by air with fast drilling speed and good strength which are used for the development of open-pit coal mines, iron mines, and non-ferrous metal mines. The thrust bearing is made of materials with high wear resistance, high hardness, and high temperature resistance to improve its load-bearing

Tci Tricone Three Cone Rock Roller Drill Bit For Oil Rig And Mining API oil rig drilling rock bits 60mm,65mm,76mm,93mm,95mm,98mm(3 7/8),101.6mm,114mm,118mm,120mm,127mm(5) 130.1mm(5 1/8),133.3mm(5 1/4),139.7mm(5 1/2),142.8mm(5 5/8),149.2mm(5 7/8) 152.4mm(6),155.5mm(6 1/8),158.7mm(6 1/4),161.9mm(6 3/8),165.1mm(6 1/2) 190.5mm(7 1/2),193.6mm(7 5/8),200.0mm(7 7/8) 212.7mm(8 3/8),215.9mm(8 1/2),222.2mm8 3/4) 241.3(9 1/2),244.4(9 5/8),250.8(9 7/8) 269.8(10 5/8)