PDC bits, Roller Cone bits, PDC reamers, Hole openers.

PDC Hole Openers, are used to enlarge the pilot hole in Horizontal Directional Drilling(HDD).Widely used in construction, bridge, highway and railway construction.

GREAT DRILL customized Rock reamers size from 10'' to 72''.

Raise Boring Cutters OverviewThe raise boring cutters is mainly used for the construction of vertical shafts, ventilation shafts inclined shafts, pressure regulating shafts and escape shafts , and it...

Overview 120 ° U-shaped Roller bitGREAT has customized manufacture several types of roller bit . The traditional roller bit was cut by tricone bit . So it is including No.1 ,No.2, No.3 Cone cutters ....