DTH Hammer is used for engineering hole such as drilling blasting hole, guardrail hole
in mines, quarries, expressway, the mountain barrier reinforcement,
anchorage, geothermal air conditioning hole.
DTH hammer working principle:
At the beginning of the impact stroke, the piston and the valve
plate are in the upper position, and the compressed air enters the
upper chamber of the cylinder through the radial holes of the valve
cover and the valve seat, and pushes the piston to move downward at
high speed to impact the drill bit. When the piston row to the
spline groove of the bushing is closed, the pressure in the lower
chamber begins to rise, so that the center hole of the upper end of
the piston leaves the gas distribution rod, the upper chamber
passes through the atmosphere, the pressure is lowered, and the
working stroke ends. When the piston hits the tail of the drill
bit, the valve piece is reversed due to the upper and lower
pressure difference, and the piston repeats the return stroke
motion.
Specification of DTH hammmer
| DTH hammer (inch) | Matched Dth bit Shank | Bit range |
| Metric | Inch |
| 3.5" | COP32/COP34/MACH303M30/DHD3.5/BR33 | 90mm-115mm | 3 1/2"-4" |
| 4" | COP44/DHD340/MACH44SD4/M40/QL40 | 105mm-152mm | 4 1/8"-6" |
| 5" | COP54/DHD350R/MACH50SD5/M50/QL50/BR5 | 133mm-165mm | 5 1/4"-6 1/2" |
| 6" | COP64/DHD360/SD6M/60/QL60/Bulroc BR6 | 152mm-254mm | 4 1/8"-10" |
| 8" | COP84/DHD380/SD8/QL80/M80 | 203mm-330mm | 8"-13" |
| 10" | SD10/NUMA100/TH10 | 254mm-380mm | 10"-15" |
| 12" | DHD1120/SD12/NUMA120/NUMA125 | 305mm-508mm | 12"-20" |
| 14" | TK14/NUMA125 | 400mm-550mm | 15 3/4"-22" |
| 18" | NUMA180/TK18 | 500mm-700mm | 19"-27 1/2"" |
| 24" | NUMA240/TK28 | 600mm-800mm | 23"-31 1/2" |
High air pressure DTH hammer:
1.High air pressure DTH hammer size from 3" to 12"(76mm-304mm)
2.Shank types including COP, QL,DHD, MISSION,HD,IR, SD,TD, etc.
3.Connect Thread : API 2 3/8" , API 3 1/2 , Reg-6 5/8"Reg etc.
Low Air Pressure DTH hammers:
1.CIR series Low air pressure DTH hammer includes: CIR55, CIR65,
CIR70, CIR80, CIR 90, CIR110, CIR110W, CIR150, CIR170, CIR200W etc.
2.J series Low air pressure DTH hammer includes: J60C, J70C, J80B,
J100B, J150B, J170B, J200B
R.C.(Reverse Circulation) hammmers
1.R.C. hammers includes:RC45,RC55,RC65,PR52 etc.
We Offer three types of Medium Pressure DTH Hammers that operating
air pressure is between 0.7 Mpa to 1.75 Mpa. And all of the BR
Medium Pressure DTH Hammers are valveless. Easy to disassemble and
assemble., Ideal faster drilling speed and higher impact frequency.
Drilling Diameter: 90mm-130mm Hammer Length: 700mm-800mm, External
Diameter: 82mm, Impact Frequency: 25Hz. Air Consumption: 4
M3/min(0.7Mpa); 6M3/min(1.0Mpa); 8M3/min(1.4Mpa).
DTH (Down-the-hole) Hammer And Bits
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
Connect Thread : API 2 3/8" , API 3 1/2 , Reg-6 5/8"Reg etc.
We supply high pressure DTH hammers model SD, COP, DHD, BR, QL M
series, N series, VKP from 2.5 inch to 12 inch with high
efficiency.
Ehern Europe: foundation, piling
Western Europe: water well and geothermal drilling
Russia: Oil, infrastructure and mining.
South east asia: mining and geothermal
South Africa: mining and water well drilling
Middle east: water well drilling
Oceania: mining, exploration and water well drilling
South America: water well drilling and mining
