Metal-face sealed bearing tricone bits is the top quality in very deep oil well drilling and very long HDD rock crossing, the bearing life is reliable, the arm back (legs back) are protected by full covered tungsten carbide inserts to bear long and hard rocks drilling to ensure cross successfully at one time.

Especially for drilling hard rocks and long distance crosing, the bearing is reliable, and tungsten carbide inserts is premium, gauge protection is full enhanced.