Products Description
Specifically designed for extra-large diameter borehole construction, they feature a rugged structure, extremely strong impact force, and outstanding stability under high-intensity working conditions. With optimized weight distribution, these hammers are compatible with heavy-duty drilling rigs, serving as core equipment in large-scale foundation engineering, ultra-deep water well drilling, large open-pit mining, and heavy geotechnical exploration. This specification is highly valued for its high efficiency, durability, and reliability in harsh and high-intensity drilling scenarios.
Parameters
Mainstream global models of 8 inch DTH hammers with mature technology and wide market application:
| DHD380 | Features stable performance and strong impact force, widely used in large open-pit mining and ultra-deep water well drilling. |
| COP84 | Offers high drilling efficiency, energy-saving, and environmental protection, suitable for extra-hard rock and ultra-deep hole construction in large-scale foundation engineering. |
| SD8 | Cost-effective with reliable quality, popular in heavy-duty civil engineering and mining projects. |
| MISSION80 | Possesses excellent adaptability to complex strata, ideal for high-intensity and harsh construction environments such as geothermal drilling. |
|
For 8" hammer DTH bits shank |
Bit Dia. |
No. |
Gauge |
Front |
Weight |
|
|
mm |
inch |
Air Holes |
Buttons |
Buttons |
(Kg) |
|
|
DHD380 |
195 |
7 11/16 |
3 |
9×φ18 |
9×φ16 |
32 |
|
203 |
8" |
2 |
9×φ18 |
10×φ18 |
41 |
|
|
216 |
8 1/2" |
2 |
10×φ18 |
12×φ16 |
49 |
|
|
254 |
10" |
3 |
11×φ18 |
17×φ16 |
71 |
|
|
305 |
12" |
4 |
12×φ18 |
29×φ16 |
95 |
|
|
SD8 |
195 |
7 11/16 |
3 |
9×φ18 |
9×φ16 |
32 |
|
203 |
8" |
3 |
9×φ18 |
9×φ18 |
41 |
|
|
216 |
8 1/2" |
2 |
10×φ18 |
12×φ16 |
49 |
|
|
254 |
10" |
3 |
11×φ18 |
17×φ16 |
71 |
|
|
305 |
12" |
4 |
12×φ18 |
29×φ16 |
95 |
|
|
QL80 |
195 |
7 11/16 |
3 |
9×φ18 |
9×φ16 |
32 |
|
203 |
8" |
3 |
9×φ18 |
9×φ18 |
41 |
|
|
216 |
8 1/2" |
2 |
10×φ18 |
12×φ16 |
49 |
|
|
254 |
10" |
3 |
11×φ18 |
17×φ16 |
71 |
|
|
305 |
12" |
4 |
12×φ18 |
29×φ16 |
95 |
|
|
Mission80 |
195 |
7 11/16 |
3 |
9×φ18 |
9×φ16 |
35 |
|
203 |
8" |
3 |
9×φ18 |
9×φ18 |
40 |
|
|
216 |
8 1/2" |
2 |
10×φ18 |
12×φ16 |
54 |
|
|
254 |
10" |
3 |
11×φ18 |
17×φ16 |
57 |
|
|
305 |
12" |
4 |
12×φ18 |
29×φ16 |
77 |
|
|
DHD 380-DTH Hammer |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
42 Kg |
9 |
Piston |
41.5 Kg |
|
2 |
Adjuster Shim |
0.2 Kg |
10 |
Piston Case |
62.5 Kg |
|
3 |
"O"Ring |
0.02 Kg |
11 |
Retainer Ring |
1.2 Kg |
|
4 |
Check Valve |
1.3 Kg |
12 |
"O"Ring |
0.02 Kg |
|
5 |
Spring |
0.09 Kg |
13 |
Adjuster Shim |
0.2 Kg |
|
6 |
rubber Buffer |
0.4 Kg |
14 |
Drive Chuck |
18.2 Kg |
|
7 |
Valve Sea |
13 Kg |
15 |
Drill Bit |
|
|
8 |
Inner Cylinder |
9.1 Kg |
|||
|
DHD380 Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
1492mm |
190Kg |
Φ180mm |
API4 1/2"REG |
DHD380 |
Φ195-Φ254mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.8Mpa |
2.4Mpa |
||||
|
1.5-3.3Mpa |
30-60 r/min |
26m³/min |
34m³/min |
||
|
QL80-DTH Hammer |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
42 Kg |
9 |
Piston |
41 Kg |
|
2 |
Adjuster Shim |
0.2 Kg |
10 |
Piston Case |
64 Kg |
|
3 |
"O"Ring |
0.02 Kg |
11 |
Guided Sleeve |
2.9 Kg |
|
4 |
Check Valve |
1.3 Kg |
12 |
Retainer Ring |
1.2 Kg |
|
5 |
Spring |
0.1 Kg |
13 |
"O"Ring |
0.02 Kg |
|
6 |
rubber Buffer |
0.4 Kg |
14 |
Adjuster Shim |
0.2 Kg |
|
7 |
Valve Sea |
12.7 Kg |
15 |
Drive Chuck |
12 Kg |
|
8 |
Inner Cylinder |
9.1 Kg |
16 |
Drill Bit |
|
|
QL80 Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
1471mm |
187Kg |
Φ180mm |
API4 1/2"REG |
QL80 |
Φ195-Φ254mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.8Mpa |
2.4Mpa |
||||
|
1.5-3.3Mpa |
30-60 r/min |
26m³/min |
34m³/min |
||
|
M80-DTH Hammer |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
43 Kg |
10 |
Nylon Plug |
0.04 Kg |
|
2 |
"O"Ring |
0.01 Kg |
11 |
Piston |
42 Kg |
|
3 |
Check Valve |
0.46 Kg |
12 |
Piston Case |
43 Kg |
|
4 |
Spring |
0.07 Kg |
13 |
Guided Sleeve |
9.8 Kg |
|
5 |
Valve Seat |
0.65 Kg |
14 |
Check Ring |
0.09 Kg |
|
6 |
"O"Ring |
0.01 Kg |
15 |
Retainer Ring |
1.9 Kg |
|
7 |
Bole |
0.3 Kg |
16 |
"O"Ring |
0.01 Kg |
|
8 |
"O"Ring |
0.01 Kg |
17 |
Drive Chuck |
17 Kg |
|
9 |
Rigid Valve |
2 Kg |
18 |
Drill Bit |
|
|
M80 Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
1333mmmm |
160.5Kg |
Φ180mm |
API4 1/2"REG |
M80 |
Φ195-Φ245mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.8Mpa |
2.4Mpa |
||||
|
1.5-3.3Mpa |
30-60 r/min |
26m³/min |
35m³/min |
||
Core Performance Features
- Extreme impact force: Equipped with super large impact energy and stable frequency, it enables efficient drilling in extra-hard rock, compact rock, and complex strata, significantly shortening the construction cycle of large-diameter projects.
- Rugged and durable: The body and internal components are made of high-strength alloy steel, through precision forging and heat treatment, with excellent wear resistance and impact resistance, adapting to long-term high-intensity work.
- Efficient slag discharge: The large-caliber optimized air channel and advanced exhaust system quickly flush cuttings out of the hole, avoiding hole blocking and drill sticking, ensuring smooth drilling.
- Strong environmental adaptability: Can work stably in high temperature, high humidity, dusty, and other harsh environments, suitable for open-pit mines, deep wells, and complex construction sites.
- Safe and easy maintenance: The scientific structural design is equipped with convenient disassembly parts, allowing for quick replacement of wearing parts, reducing maintenance time and improving construction safety and efficiency.
Application Scenarios
- Water well drilling: Used for ultra-deep and large-diameter water well construction for industrial, civil, and agricultural use, adapting to complex strata and meeting large water yield requirements.
- Mining operations: Applied in drilling large-diameter blasting holes in large open-pit mines and large-scale underground mines, improving blasting efficiency and mining output.
- Foundation engineering: Utilized for drilling extra-large diameter pile holes for super high-rise buildings, large bridges, ports, and large industrial plants, ensuring foundation stability.
- Geothermal and energy projects: Used for drilling geothermal wells, natural gas exploration wells, and large-scale energy development projects.
Our Service
At KAT Drilling Tools, we deliver customer-centric solutions for mining, construction, exploration, and oil & gas sectors-covering the full drill tool lifecycle.
Customized Design & Manufacturing
Bespoke drill bits/rods tailored to your drilling conditions, compliant with API/ISO standards. Rapid prototyping and batch production available.
Quality Control & Testing
Rigorous raw material, in-process, and final performance inspections. Detailed quality reports for every batch.
Technical Consultation & Support
Expert advice on tool selection, on-site training, and real-time troubleshooting to minimize downtime.
After-Sales Maintenance & Repair
Cost-effective maintenance, professional repair, and fast spare parts supply to extend tool lifespan.
Logistics & Supply Chain
Flexible delivery (bulk/JIT/emergency), secure packaging, and full customs/documentation support for global trade.
Long-Term Partnership
Customized service packages, dedicated account management, and continuous optimization based on your feedback.
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