API oil steel tooth bits IADC217 8.5 inches (215mm) for rock drilling

Tricone bit use Journal bearing,hardfaced head bearing surface.,cone bearing inlaid with friction reducing alloy and then silverplated. The load capacity and seizure resistance of the bearing is greatly improved.
O-ring seal is made of the more wear resistance high saturated bunawith the increased seal section and precisely designed sealing flange in the cone sealing area increased the reliability  of the seal. The bit bearing can be ball locked
For steel tooth bit, the tooth surface is hardfaced with new type of wear resistan.
Material and thus extended working life of the cutting structure while still maintaining high ROP
----Cutting Structure
Steel Tooth: Premium tungsten carbide hard facing on the surface, it's greatly enhance the wear resistance of the tooth.
Tungsten Carbide Inserts: Various type high quality tungsten carbide inserts can be equipped on the bits, professional and
scientific selection of the inserts as per the different application and drilling process to achieve high efficient drilling
production.