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Roller Cone Bits(NG3) for Rock Piling Core Barrel

Roller Cone Bits(NG3) for Rock Piling Core Barrel


rock cone roller bits




Technical specification of roller cone bit NG3

Raw Material
Cone 15MnNi4Mo
Arm 15CrNiMo
Tooth Tungsten Carbide Inserts
Tooth Type
Tooth Qty.&Diameter 49 PCS / 14mm
Tooth Height Total height: 23mm/21mm/19mm, inside height: 12mm/11mm/11mm, outside height: 11mm/10mm/8mm
Bearing and Lubrication
Tungsten carbide enhanced on bearing
A Yes  
B Yes  
C No  
Grease Lubrication & Bearing Seal
Inject grease by vacuum machine, O-ring Seal



138mm roller cone bit is made by tungsten carbide inserts are full fitting on surface ,it is different from traditional Single cone roller bit that inserts are groove-inserts-groove design.
Steel material of arm and cone is important for the quality, we use 15MnNi4Mo steel for cone, and we use 15CrNiMo steel for arm, it is standard steel material for oil well drilling tricone bit.
Among cone-diameter 133mm roller cone bit in Solidkey, this model is almost the best quality and performance, we have many regular customers from China domestic and South-East Asia,  many deep piling holes are requested in foundation projects for tall building and railway construction.
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