Products Description
Specifically crafted for small-bore drilling tasks, they come with a streamlined structure, hassle-free operation, and consistent working stability. Their lightweight and space-saving design enables seamless compatibility with most small and medium-sized drilling rigs, making them a go-to tool in shallow foundation works, domestic water well drilling, small-scale mining, and geological prospecting. This specification is highly sought-after for its agility and cost-efficiency, especially in small-diameter drilling projects where operational space is limited.
Parameters
Internationally recognized mainstream models of 3 inch DTH hammers, characterized by mature technology and extensive practical application:
| DHD3.5 | Delivers consistent and reliable performance, widely employed in small-scale mining and domestic water well drilling projects. |
| COP32 | Excels in drilling efficiency, making it particularly suitable for hard rock drilling scenarios in small to medium-sized projects. |
| SD3 | Offers excellent cost-performance ratio and reliable quality, gaining popularity in civil engineering and small foundation projects. |
| MISSION30 | Boasts strong adaptability to complex stratum conditions, performing stably in challenging drilling environments. |
|
For 3" hammer |
Bit Dia. |
Air Holes qty |
Gauge |
Front |
Weight |
|
|
DTH bits shank |
mm |
inch |
Buttons |
Buttons |
(Kg) |
|
|
COP32 |
85 |
3 11/32" |
2 |
6×φ13 |
4×φ12 |
4.2 |
|
90 |
3 1/2" |
2 |
6×φ14 |
4×φ12 |
4.5 |
|
|
95 |
3 3/4" |
2 |
6×φ14 |
4×φ13 |
4.7 |
|
|
100 |
3 7/8" |
2 |
8×φ12 |
6×φ12 |
5 |
|
|
105 |
4 1/8" |
2 |
8×φ13 |
6×φ12 |
5.3 |
|
|
Mission30 |
90 |
3 1/2" |
2 |
6×φ14 |
4×φ12 |
4.7 |
|
95 |
3 3/4" |
2 |
6×φ14 |
4×φ13 |
4.7 |
|
|
100 |
3 7/8" |
2 |
6×φ14 |
5×φ13 |
5.3 |
|
|
105 |
4 1/8" |
2 |
6×φ14 |
5×φ13 |
5.3 |
|
|
DHD3.5 |
85 |
3 11/32" |
2 |
6×φ13 |
4×φ12 |
4.2 |
|
90 |
3 1/2" |
2 |
6×φ14 |
4×φ12 |
4.5 |
|
|
95 |
3 3/4" |
2 |
6×φ14 |
4×φ13 |
4.8 |
|
|
100 |
3 7/8" |
2 |
8×φ12 |
6×φ12 |
5 |
|
|
105 |
4 1/8" |
2 |
8×φ13 |
6×φ12 |
5.5 |
|
|
QL30 |
85 |
3 11/32" |
2 |
6×φ13 |
4×φ12 |
4.5 |
|
90 |
3 1/2" |
2 |
6×φ14 |
4×φ12 |
4.7 |
|
|
95 |
3 3/4" |
2 |
6×φ14 |
4×φ13 |
4.9 |
|
|
100 |
3 7/8" |
2 |
8×φ12 |
6×φ12 |
5 |
|
|
105 |
4 1/8" |
2 |
8×φ13 |
6×φ12 |
5.5 |
|
|
DHD 3.5 Hammer |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
4.4 Kg |
9 |
External Cylinder |
9.5 Kg |
|
2 |
"O"Ring |
0.01 Kg |
10 |
Stop Ring |
0.1 Kg |
|
3 |
Check Valve |
0.2 Kg |
11 |
O Ring of Top Sub |
0.01 Kg |
|
4 |
Spring |
0.02 Kg |
12 |
Drive Chuck |
2.1 Kg |
|
5 |
Compression Buffer |
0.02 Kg |
13 |
Drill Bit |
|
|
6 |
Air Distribution |
1.4 Kg |
|||
|
7 |
Inner Cylinder |
1.7 Kg |
|||
|
8 |
Piston |
5.6 Kg |
|||
|
DHD 3.5 Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
928mm |
25Kg |
Φ82mm |
API2 3/8"REG |
DHD3.5 |
Φ90-Φ110mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.0Mpa |
1.5Mpa |
||||
|
1.0-1.7 Mpa |
30-60 r/min |
4.5m³/min |
8.5m³/min |
||
|
M30-DTH Hammers |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
4.5 Kg |
9 |
Guided Sleeve |
0.9 Kg |
|
2 |
"O"Ring |
0.01 Kg |
10 |
Retainer Ring |
0.2 kg |
|
3 |
Check Valve |
0.13 Kg |
11 |
"O"Ring |
0.01 Kg |
|
4 |
Spring |
0.02 Kg |
12 |
Drive Chuck |
2.5 kg |
|
5 |
Valve Seat |
0.76 Kg |
13 |
Drill Bit |
|
|
6 |
Inner Cylinder |
1.45 Kg |
|||
|
7 |
Piston |
4.8 Kg |
|||
|
8 |
Piston Case |
7.6 Kg |
|||
|
M30 Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
931mmmm |
23Kg |
Φ82mm |
API2 3/8"REG |
M30 |
Φ90-Φ115mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.0Mpa |
1.5Mpa |
||||
|
1.0-1.7Mpa |
30-50 r/min |
4m³/min |
6.5m³/min |
||
Core Performance Features
- Space-saving & portable: Its compact size and light weight facilitate easy installation, disassembly, and transportation, making it ideal for narrow or confined construction sites where large equipment cannot operate.
- Superior rock-breaking efficiency: Equipped with high impact energy and fast frequency, it achieves excellent penetration in medium-hard to hard rock formations, accelerating drilling progress.
- Robust & long-lasting: Internal components are manufactured from high-hardness alloy steel, boasting strong wear resistance and enabling a prolonged service life even under frequent use.
- Efficient cuttings removal: The improved air channel design ensures effective flushing of drill cuttings, minimizing the likelihood of hole clogging and maintaining uninterrupted drilling operations.
- Versatile compatibility: It can be paired with various types of 3 inch DTH bits and adapts well to different stratum conditions, enhancing its applicability across multiple construction tasks.
Application Scenarios
- Domestic water well drilling: Used for constructing shallow water wells in rural and suburban areas, capable of adapting to sand and medium-hard rock strata to meet daily water supply needs.
- Small-scale mining blasting: Drills small-diameter blasting holes in open-pit mines and quarries, supporting efficient mining operations.
- Geological prospecting: Employed for core drilling and stratum sampling in geological exploration projects, providing accurate data for engineering design.
- Shallow foundation engineering: Used to drill small-diameter pile holes, slope drainage holes, and monitoring holes for small buildings and road 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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