High Air Pressure DTH Hammer| Inch | Length (Less Bit) | Weight (Less Bit) | External Diameter | Bit Shank | Hole Range | Connection Tread | | 2" | 872mm | 16kg | Φ71mm | HD25 | Φ76-Φ90 | T42*10*1.5 | | 3" | 888mm | 25kg | Φ82mm | IR3.5 | Φ90-Φ115 | API 2 3/8" Reg | | 4" | 1011mm | 43.2kg | Φ99mm | COP44 DHD340 | Φ110-Φ135 | API 2 3/8" Reg | | 986mm | 37kg | Φ92mm | COP44 DHD340 | Φ105-Φ120 | | 1012mm | 40kg | Φ99mm | SD4 | Φ110-Φ135 | | 1070mm | 40kg | Φ99mm | QL40 | Φ110-Φ135 | | 1005mm | 40kg | Φ99mm | MISSION 40 | Φ110-Φ135 | | 5" | 1110mm | 69kg | Φ125mm | COP54 DHD350R | Φ135-Φ155 | API 2 3/8" Reg API 3 1/2" Reg | | 1110mm | 66kg | Φ116mm | COP54 DHD350R | Φ127-Φ145 | | 1102mm | 68kg | Φ125mm | COP55C DHD350Q | Φ135-Φ155 | | 1090mm | 70kg | Φ125mm | SD5 | Φ135-Φ155 | | 1090mm | 67kg | Φ125mm | QL50 | Φ135-Φ155 | | 1110mm | 68.5kg | Φ125mm | MISSION 50 | Φ135-Φ155 | | 6" | 1238mm | 98kg | Φ142mm | COP64 DHD360 | Φ155-Φ203 | API 3 1/2" Reg | | 1182mm | 90kg | Φ146mm | SD6 | Φ155-Φ203 | | 1183mm | 92kg | Φ146mm | QL60 | Φ155-Φ203 | | 1161mm | 90kg | Φ146mm | MISSION 60 | Φ155-Φ203 | | 7" | 1258mm | 120kg | Φ165mm | COP64 DHD360 | Φ175-Φ216 | API 3 1/2" Reg | | 8" | 1359mm | 175kg | Φ180mm | COP84 DHD380 | Φ195-Φ254 | API 4 1/2" Reg | | 1330mm | 174kg | Φ180mm | SD8 | Φ195-Φ254 | | 1330mm | 171kg | Φ180mm | QL80 | Φ195-Φ254 | | 1338mm | 176kg | Φ180mm | MISSION 80 | Φ195-Φ254 | | 1340mm | 203kg | Φ203mm | QL80 | Φ216-Φ254 | | 10" | 1525mm | 316kg | Φ226mm | SD10 | Φ254-Φ311 | API 6 5/8" Reg | | 1545mm | 305kg | Φ226mm | NUMA100 | Φ254-Φ311 | | 12" | 1880mm | 474kg | Φ275mm | DHD1120 | Φ305-Φ445 | API 6 5/8" Reg | | 1860mm | 480kg | Φ275mm | SD12 | Φ305-Φ445 | | 1880mm | 475kg | Φ275mm | NUMA120 | Φ305-Φ445 | | 1880mm | 470kg | Φ275mm | NUMA125 | Φ305-Φ445 |
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High pressure DTH Hammer
Introduction
It is a kind of valveless high air pressure DTH hammer with foot valve.
The rock hammer has the fellow advantages
1: Valveless air distribution. more reliable.
2. The rock impacter are simple design of the piston, long life.
3. More efficient energy transfter,faster drilling speed, lower air consumption and lower oil consumption.
4. Fewer internal parts, simple structure, long life, less failure and easier to maintain because all the parts are heat treated.
5. Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected multi-step thread.