3.5inch~12inch DTH Hammer with model DHD 3.5/340/350/360/380/1120
for quarries drilling
The optimum range of hole size for blast hole drilling with DTH is
90 mm to 254 mm (3 ½"–10"). Smaller blast holes are generally
drilled using tophammer, and larger holes generally use rotary
machines.
In other applications, like foundation drilling, DTH hammers can be
used with single bit in hole sizes up to 750 mm (30"). With
multiple hammer units CD (Clusterdrills) drill holes up to 70" or
1778 mm.
All products are interchangeable with various products manufactured
by Atlas Copco.
Specification:
High Air Pressure DTH hammers(3''-12''):
1. ND(DHD Shank) series high air pressure DTH hammer
includes:DHD3.5,DHD340,DHD350R,DHD360,DHD380,DHD1120
2. QL series high air pressure DTH hammer
includes:QL40,QL50,QL60,QL80
3. SD series high air pressure DTH hammer
includes:SD4,SD5,SD6,SD8,SD10,SD12
4. NUMA series high air pressure DTH hammer
includes:NUMA100,NUMA120,NUMA125
5. COP series high air pressure DTH hammer
includes:COP44,COP54,COP64,COP84
6. Connect Thread : API 2 3/8" , API 3 1/2 , API-6 5/8"Reg etc.
| Technical Data |
| DHD3.5 | DHD340 | DHD350 |
| Length(Without Bit) | 930mm | 1030mm | 1214mm |
| Weight(Without Bit) | 25.00 kg | 39.00 kg | 76.50 kg |
| External Diameter | 82mm | 99mm | 126mm |
| Bit Shankd | DHD3.5 | DHD340 | DHD350 |
| Hole Range | 90-110 mm | 110-135 mm | 135-155 mm |
| Connect ion Thread | API 2 3/8”Reg | API 2 3/8”Reg | API 2 3/8”Reg API 3 1/2”Reg API 2 7/8”Reg |
| Working Pressure7 | 1.0-1.5 Mpa | 1.2-2.0 Mpa | 1.3-2.3Mpa |
| Inpact Rate at 17 Bar | 28HZ | 27HZ | 25HZ |
| Reccfurended Rotation Speed | 25-40 "min | 25-40 r/min | 20-35 r/min |
| Air Consunption | 1.0Mpa :4.5 m3/min | 1.0Mpa :6m3/min | 1.0Mpa:9 m3/min |
| 1.5Mpa:9.0m3/min | 1.8Mpa:10m3/min | 1.8Mpa:15m3/min |
| 2.4Mpa:15m3/min | 2.4Mpa:23m3/min |
| Technical Data |
| DHD360 | DHD380 | DHD1120 |
| Length(Without Bit) | 1248mm | 1492mm | 1900mm |
| Weight(Without Bit) | 100.00 kg | 188.00 kg | 480kg |
| External Diameter | 142/144/146/148mm | 180/185mm | 275mm |
| Bit Shank | DHD360 | DHD380 | DHD1120 |
| Hole Range | 155-190 mm | 195 -254 mm | 305-445mm |
| Connect ion Thread | API 3 1/2”Reg | API 4 1/2”Reg | API-6 5/8" |
| Working Pressure | 1.5-2.5 Mpa | 1.5-3.0Mpa | 2.0-3.5Mpa |
| Inpact Rate at 17 Bar | 23HZ | 27HZ | 16HZ |
| Reccfurended Rotation Speed | 20-30 r/min | 20-30 r/min | 15-25 r/min |
| Air Consunption | 1.0Mpa :10 m3/min | 1.0Mpa :15 m3/min | 1.0Mpa :30 m3/min |
| 1.8Mpa:20m3/min | 1.8Mpa:26m3/min | 1.8Mpa :56 m3/min |
| 2.4Mpa:28.5m3/mi | 2.4Mpa:34m3/min | 2.4Mpa :78 m3/min |
Advantages
| dth hammer: | dth hammer spare parts |
| More efficient energy transfer. | Valveless air distribution. More reliable. |
| Faster drilling speed, 15%-30% higher than others. | Simple design of the piston, long life |
| Lower air consumption and lower oil consumption. oil consumption is
about 10% lower than others | Fewer internal parts, simple structure, longer life, less failure
and easier to maintain because all the parts are heat treated. |
| Direct factory price | Easy to disassemble because the top sub, the drive chuck and the
external cylinder are connected by multi-step thread. |
Application
DTH hammers and bits are widely used in underground mining,
quarries, hydraulic and Hydro-Power Engineering, water well
drilling, Mineral exploration, anchoring hole drilling, geothermal
engineering, Subway excavation, another civil engineering. it has
the advantage of high flatness, smooth hole wall, high rigid of
drill rod and hammer, independent of high axial thrust, no limit of
drilling depth, low cost of devices and easiness to maintain.
