Tianjin Grand Construction Machinery Technology Co., Ltd. deeply engaged in rock breaking tools more...
HA/HAT Series Tricone Bit Diameter from 3 7/8-36 inch,IADC Code from 117 to 837. We have enough stock,it can be used for water well,oil & gas drilling and son.View More
This series tricone bit use Journal bearing. Hardfaced head bearing surface. Cone bearing inlaid with friction reducing alloy and then silver-plated. The load capacity and seizure resistance of the bearing is greatly improved.View More
Hardfaced head bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver plated. Abrasion resistance and seizure resistance of the bearing are improved.View More