High Air Pressure DTH Hammer Hard Rock Drill Bits Cop32 Cop34
DHD330
DTH Bit
DTH bit is also our main product. After mang years search, we have
rich experience in development and manufacturing high quality
products, which adopted high-quality raw materials, advanced
technology and passed through strictly inspection.
1.high and low air pressure down-the-hole drill bits
2.Low air pressure holeDia.:65-220mm
3.High air pressure hole Dia.:85-305mm
4.Face type:drop center/concave/convex/double gauge/flat
5.Our DTH Bit can be suitable for many types of DTH Hammer, such as
XL, Mission, COP, IR, Mach, Demag, SD, Bulroc, Halco Mach, Digger
etc.
High Air Pressure DTH Hammer (with foot valve)
It is a kind of valveless high air pressure DTH hammer with foot
valve.
Advantages:
1.Valveless air distribution, more reliable;
2.Piston with simple but compact design, long life;
3.More efficient energy transfer, faster drilling speed, lower air
consumption and lower oil consumption.
4.Fewer internal parts, simple structure, longer life, less failure
and easier to maintain, with the all heat treated parts;
5.Easy to disassemble, thanks for the top sub, drive chuck and
external cylinder all are connected by multi-step thread.
| DTH hammer type | DTH355 | DTH345 |
| Length(less bit) mm | 930mm | 1030 |
| Weight(less bit) kg | 25kg | 39 |
| External diameter mm | Φ82mm | Φ99 |
| Bit shank | DHD3.5 | COP44 DHD340 |
| Hole range(mm) | Φ90-110 | Φ110-135 |
| Connection thread | API 2 3/8” Reg. | API 2 3/8"Reg |
| |
| Working pressure | 1.0-1.5Mpa | 1.0-2.5Mpa |
| Impact rate at 1.5-1.7Mpa | 28Hz | 27Hz |
| Recommended Rotation speed | 25-40r/min | 25-40r/min |
| Air consumption | 1.0Mpa | 4.5m3/min | 6.0m3/min |
| 1.8Mpa | 9.0m3/min | 10.0m3/min |
| 2.4Mpa | / | 15.0m3/min |
| DTH hammer type | DTH355 | DTH355K |
| Length(less bit) mm | 1214 | 1160 |
| Weight(less bit) kg | 76.5 | 72.5 |
| External diameter mm | Φ125 | Φ125 |
| Bit shank | COP54/ DHD350R | HD55C /DHD350Q |
| Hole range(mm) | Φ135-155 | Φ135-155 |
| Connection thread | API 2 3/8"Reg | API 2 3/8"Reg |
| API 3 1/2"Reg | API 3 1/2"Reg |
| Working pressure | 1.0-2.5Mpa | 1.0-2.5Mpa |
| Impact rate at 1.5-1.7Mpa | 25Hz | 25Hz |
| Recommended Rotation speed | 20-35r/min | 20-35r/min |
| Air consumption | 1.0Mpa | 9.0m3/min | 9.0m3/min |
| 1.8Mpa | 15.0m3/min | 15.0m3/min |
| 2.4Mpa | 23.0m3/min | 23.0m3/min |
| DTH hammer type | DTH365 | DTH385 |
| Length(less bit) mm | 1248 | 1492 |
| Weight(less bit) kg | 100 | 188 |
| External diameter mm | Φ142 | Φ180 |
| Bit shank | COP64 DHD360 | COP84 DHD380 |
| Hole range(mm) | Φ155-190 | Φ195-254 |
| Connection thread | API 3 1/2"Reg | API 4 1/2"Reg |
| |
| Working pressure | 1.0-2.5Mpa | 1.0-2.5Mpa |
| Impact rate at 1.5-1.7Mpa | 23Hz | 20Hz |
| Recommended Rotation speed | 20-30r/min | 20-30r/min |
| Air consumption | 1.0Mpa | 10.0m3/min | 15.0m3/min |
| 1.8Mpa | 20.0m3/min | 26.0m3/min |
| 2.4Mpa | 28.5m3/min | 34.0m3/min |
| DTH hammer type | DTH380 | DTH31100 |
| Length(less bit) mm | 1463 | 1502 |
| Weight(less bit) kg | 192 | 290 |
| External diameter mm | Φ180 | Φ226 |
| Bit shank | SD8 | SD10 |
| Hole range(mm) | Φ195-254 | Φ254-311 |
| Connection thread | API 4 1/2"Reg | API 4 1/2"Reg |
| API 6 5/8"Reg |
| Working pressure | 1.0-2.5Mpa | 1.0-2.5Mpa |
| Impact rate at 1.5-1.7Mpa | 20Hz | 18Hz |
| Recommended Rotation speed | 15-25r/min | 15-25r/min |
| Air consumption | 1.0Mpa | 15.0m3/min | 22.0m3/min |
| 1.8Mpa | 26.0m3/min | 40.0m3/min |
| 2.4Mpa | 34.0m3/min | 55.0m3/min |
About us
MIROC® Rock Drilling Tools are Rock Drilling Tools Brand by KSQ
Tecnologies (Beijing) Co. Ltd.
KSQ Technologies (Beijing) Co. Ltd. provides exceptional technical
know-how in development, production, and application. The company
has adopted advanced manufacturing processes to ensure high quality
steels and tungsten carbide inserts for its rock drilling
accessories. Its personnel understand clients’ drilling needs, and
have the service skills to recommend the right drilling tools for
the job. Its experienced product developers can also create custom
tools. Furthermore, the company’s development team introduces
innovative products each year – tools that are rigorously tested in
the field and proven
to perform beyond industry expectations.
MIROC® Rock Drilling and Ground Support Tools include:
Integral Rods
Plug Hole Rods
Tapered Drilling Tools
Extension Drilling Tools
Drifting and Tunneling Tools
Reaming Tools
Shank Rods
Shank Adapters (Striking Bars)
Down-the-hole (DTH) Bits
Down-the-hole (DTH) Hammers
