Hemispherical DTH Drill Bit 273 mm For DTH Blasting Drilling Machine

Numa Hammers Dth Drill Bit Rocktech Usa Foundation Drilling Description: Carbide Design DTH Bits with hemispherical carbide configuration are capable of drilling in hard rock. Although their penetration rate is slower in comparison to the bits with semi ballistic carbide profile, the bits equipped with these hemispherical buttons have a longer life. Shank types: DHD3.5, DHD340A, DHD350R, DHD360, DHD380. DTH rock drill bits hole diameter: 3', 4', 5', 6', 8'(85mm-305mm)