AfricaRoc DHD 361 6” DTH Hammer with foot valve. Request A Quote View Brochure Details Value Length (Without Bit) 1248mm Weight (Without Bit) 100.6Kg External Diameter Ø148mm Bit Shank DHD 360 Hole Range Ø155- Ø190 Connection Thread API 3 1/2″ Reg Working Pressure 1.0-2.5Mpa Recommended Rotation Speed 20-30r/min Advantages » High Performance in hard and soft formations» Spares and services locally available» Faster drilling speed and lower air consumption» Fewer internal parts|» All parts heat treated