HDD Pilot Drill Bits

HDD Pilot Drill Bits HDD pilot drill bit is the first guider hole in trenchless application, 9 1/2" is a big diameter for pilot hole, it is always working with big capacity trencher. Product Specification Cone Size 9 1/2" Bearing Type Metal-face Sealed Bearing Tooth Type TCI Circulation Type Mud Fluid Thread Connection 6 5/8 Reg Pin Gauge Protection Available Shirttail Protection Available Operating Parameters RPM(r/min) 120~50 WOB(KN) 108~241.3 Application Medium formations