GREAT's High-quality Bits Series III

RC PDC bit from GREAT are manufactured from AISI 4145H heat-treated steel.

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

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 ....

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...