Trenchless Pilot Drill Bit

6 Inches HDD Drill Pilot Bits With Metal Sealed Bearing Especially for drilling hard rocks and long distance crosing, the bearing is reliable, and tungsten carbide inserts is premium, gauge protection is full enhanced. Product Specification Cone Size 6" Bearing Type Metal-face Sealed Bearing Tooth Type TCI Circulation Type Mud Fluid Thread Connection 3 1/2 Reg Pin Gauge Protection Available Shirttail Protection Available Operating Parameters RPM(r/min) 180~40 WOB(KN) 76~167