Valveless Down The Hole Drilling Tools 8 Inch With High Efficient
Energy Transfer Dth Hammer
In DTH hammers, the rock drilling bit is a continuation of the
shank, which the rock drill piston strikes directly. Since the
piston is in direct contact with the drill bit, little energy is
lost. This gives DTH hammers a nearly constant penetration rate
regardless of hole length.
The Characteristics of High Air Pressure DTH Hammers With Foot
Valve:
It is a kind of valveless high air pressure DTH hammer with foot
valve. It has the following advantages:
The main features are as following:
1. Valveless air distribution, more reliable.
2. Simple design of the piston. Long life span.
3. More efficient energy transfer, faster drilling speed, low air
consumption and lower oil consumption.
4. Fewer internal parts, simple structure, long life span, 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 by multiple steps thread.
QL80 High Air Pressure DTH Hammer With Foot Valve Specification:
| Items | Replacement Parts |
| 1 | Top sub |
| 2 | O-ring of top sub |
| 3 | Breakout Ring |
| 4 | Check Valve |
| 5 | Spring |
| 6 | Compression Buffer |
| 7 | Air Distributor |
| 8 | Internal cylinder |
| 9 | Piston |
| 10 | External cylinder |
| 11 | Guide sleeve |
| 12 | O-ring of stop ring |
| 13 | Stop ring |
| 14 | Breakout ring |
| 15 | Drive chunk |
| 16 | Drill bit |
| Drilling Diameter(mm) | Hammer Length Without Bit(mm) | External Diameter(mm) | Weight Without Bit(kg) |
| φ195-φ254 | 1465 | 180mm | 182 |
| Working Pressure(Mpa) | Air Consumption(m³/min) |
| 1.5-3.0 Mpa | 1.0Mpa: 15 m³/min | 1.8Mpa: 26 m³/min | 2.4Mpa: 34 m³/min |
| Impact rate at 17 bar | Recommended Rotation Speed | Connection Rod Thread | Bit Shank |
| 20HZ | 15-25 r/min. | API 4 1/2'' Reg | QL80 |
The Characteristics of High Air Pressure DTH Hammers Without Foot
Valve:
It is a kind of high air pressure DTH hammer without foot valve,
and it is our newest design. It is also one of the most advanced
DTH hammers in the world.
It has the following advantages:
1. Out of the trouble of foot valve fracture and expansion and
contraction.
2. Lower energy consumption and higher impact frequency. The
drilling speed is 15-30% higher than the one with foot valve.
3. Simple structure, reliable parts, long life span, easy and cheap
maintenance.
4. Lower air and oil consumption. The oil consumption is about 10%
lower than the one with foot valve.
QL80 High Air Pressure DTH Hammer Without Foot Valve Specification:
| Items | Replacement Parts |
| 1 | Top sub |
| 2 | O-ring of top sub |
| 3 | Breakout Ring |
| 4 | Check Valve |
| 5 | Spring |
| 6 | Air Distributor |
| 7 | Internal cylinder |
| 8 | Piston |
| 9 | External cylinder |
| 10 | Guide sleeve |
| 11 | O-ring of stop ring |
| 12 | Stop ring |
| 13 | Breakout ring |
| 14 | Drive chunk |
| 15 | Drill bit |
QL80 High Air Pressure DTH Hammer Without Foot Valve Specification:
| Drilling Diameter(mm) | Hammer Length Without Bit(mm) | External Diameter(mm) | Weight Without Bit(kg) |
| φ216-φ254 | 1340 | 203mm | 203 |
| Working Pressure(Mpa) | Air Consumption(m³/min) |
| 1.8-3.0 Mpa | 1.0Mpa: 16 m³/min | 1.8Mpa: 28 m³/min | 2.4Mpa: 39 m³/min |
| Impact rate at 17 bar | Recommended Rotation Speed | Connection Rod Thread | Bit Shank |
| 22HZ | 15-25 r/min. | API 4 1/2'' Reg | QL80 |
Applications
1. Mine and quarry
2. Road construction for the drilling and blasting work
3. Water well drilling
4. Slope protection
KSQ Related Rock Drilling Tools:
(1) Integral Drill Rod–Shank H19 x 108mm and H22 108mm.
(2) Tapered Rock Drill Tools - chisel bit, cross bit, button bit, drill rod of taper 7, 11, 12
degree
(3) Threaded Rock Drill Tools - button bit, retrac button bit, drop center button bit, dome bit,
reaming bit,extension rod, MF-Rod, coupling sleeve of thread R25,
R28, R32, R38, T38, T45, T51, ST58, ST68.
(4) Shank Adapters (Striking Bars) - equivalent to Atlas Copco, , Furukawa, Gardner Genver, Ingersoll
Rand etc.
(5) Down-the-hole (DTH) Bits& Hammers - 3'', 4'', 5'', 6'', 8'' hammer and DTH button bit.
Other products: Tricone bits, PDC bits, self- drilling hollow
anchor bar etc.
