Products Description
Designed specifically for medium-to-large diameter borehole construction, they feature a robust structure, high impact efficiency, and strong resistance to harsh working conditions. With a reasonable weight and volume, these hammers are compatible with most medium and large-sized drilling rigs, serving as core equipment in foundation engineering, deep water well drilling, mining operations, and large-scale geotechnical exploration. This specification is highly valued for its reliability and efficiency in medium-heavy drilling projects.
Parameters
Mainstream global models of 5 inch DTH hammers with mature technology and wide market application:
| DHD350 | Features stable performance and strong impact force, widely used in deep water well drilling and hard rock mining. |
| COP54 | Offers high drilling efficiency, energy-saving, and environmental protection, suitable for large-scale foundation engineering and deep hole construction. |
| SD5 | Cost-effective with reliable quality, popular in civil engineering and mining projects. |
| MISSION50 | Possesses strong adaptability to complex strata, ideal for harsh construction environments. |
|
DTH bit shanks for 5inch DTH hammer |
Bit Dia. |
No. |
Gauge |
Front |
Weight |
|
|
mm |
inch |
Air Holes |
Buttons |
Buttons |
(Kg) |
|
|
DHD350R |
133 |
5 1/4" |
2 |
7×φ16 |
6×φ14 |
15 |
|
140 |
5 1/2" |
2 |
7×φ18 |
7×φ14 |
16 |
|
|
146 |
5 3/4" |
2 |
8×φ18 |
7×φ14 |
17 |
|
|
152 |
6" |
2 |
8×φ18 |
8×φ14 |
17.5 |
|
|
165 |
6 1/2" |
2 |
8×φ18 |
8×φ16 |
18.5 |
|
|
SD5 |
133 |
5 1/4" |
2 |
7×φ16 |
6×φ14 |
15.5 |
|
140 |
5 1/2" |
2 |
7×φ18 |
7×φ14 |
16 |
|
|
146 |
5 3/4" |
2 |
8×φ18 |
7×φ14 |
16.5 |
|
|
152 |
6" |
2 |
8×φ18 |
8×φ14 |
17 |
|
|
165 |
6 1/2" |
2 |
8×φ18 |
8×φ16 |
19 |
|
|
QL50 |
133 |
5 1/4" |
2 |
7×φ16 |
6×φ14 |
15.5 |
|
140 |
5 1/2" |
2 |
7×φ18 |
7×φ14 |
16 |
|
|
146 |
5 3/4" |
2 |
8×φ18 |
7×φ14 |
16.5 |
|
|
152 |
6" |
2 |
8×φ18 |
8×φ14 |
17 |
|
|
165 |
6 1/2" |
2 |
8×φ18 |
8×φ16 |
19 |
|
|
Mission50 |
133 |
5 1/4" |
2 |
7×φ16 |
6×φ14 |
12.5 |
|
140 |
5 1/2" |
2 |
7×φ18 |
7×φ14 |
13.5 |
|
|
146 |
5 3/4" |
2 |
8×φ18 |
7×φ14 |
14 |
|
|
152 |
6" |
2 |
8×φ18 |
8×φ14 |
14.4 |
|
|
165 |
6 1/2" |
2 |
8×φ18 |
8×φ16 |
15 |
|
|
DHD350-DTH Hammer |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
14.7 Kg |
9 |
Inner Cylinde |
4.9 Kg |
|
2 |
"O"Ring |
0.02 Kg |
10 |
Piston |
15.5 Kg |
|
3 |
Check Valve |
1 Kg |
11 |
Piston Case |
30.3 Kg |
|
4 |
Spring |
0.06 Kg |
12 |
Retainer Ringk |
0.3 Kg |
|
5 |
regulate ring |
0.1 Kg |
13 |
"O"Ring |
0.01 Kg |
|
6 |
rubber Buffer |
0.06 Kg |
14 |
Drive Chuck |
7.1 Kg |
|
7 |
pedestal |
0.2 Kg |
15 |
Drill Bit |
|
|
8 |
Valve Sea |
4.2 Kg |
|||
|
Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
1209mm |
78.5Kg |
Φ125mm |
API2 3/8"REG |
DHD350 |
Φ135-Φ155mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.0Mpa |
1.8Mpa |
||||
|
1.0-2.5Mpa |
30-60 r/min |
9m³/min |
15m³/min |
||
|
QL50-DTH Hammer |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
14.7 Kg |
9 |
Piston Case |
24.7 Kg |
|
2 |
"O"Ring |
0.02 Kg |
10 |
Guided Sleeve |
1 Kg |
|
3 |
Check Valve |
1 Kg |
11 |
Retainer Ring |
0.6 Kg |
|
4 |
Spring |
0.06 Kg |
12 |
"O"Ring |
0.01 Kg |
|
5 |
rubber Buffer |
0.2 Kg |
13 |
Drive Chuc |
5.6 Kg |
|
6 |
Valve Sea |
4.1 Kg |
14 |
Drill Bit |
|
|
7 |
Inner Cylinder |
4.4 Kg |
|||
|
8 |
Piston |
17 Kg |
|||
|
QL50 Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
1154mm |
73.5Kg |
Φ126mm |
API2 3/8"REG |
QL50 |
Φ135-Φ155mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.0Mpa |
1.8Mpa |
||||
|
1.0-2.5Mpa |
30-60 r/min |
9m³/min |
15m³/min |
||
|
M50-DTH Hammer |
|||||
|
|
|||||
|
Ref. |
Parts |
Weight |
Ref. |
Parts |
Weight |
|
1 |
Top Sub |
13.7 Kg |
9 |
Guided Sleeve |
2.6 Kg |
|
2 |
"O"Ring |
0.02 Kg |
10 |
Retainer Ring |
0.7 Kg |
|
3 |
Check Valve |
0.7 Kg |
11 |
"O"Ring |
0.01 Kg |
|
4 |
Spring |
0.1 Kg |
12 |
Drive Chuck |
7.1 Kg |
|
5 |
Valve Seat |
2 Kg |
13 |
Drill Bit |
|
|
6 |
Inner Cylinder |
2.8 Kg |
|||
|
7 |
Piston |
15 Kg |
|||
|
8 |
Piston Case |
24 Kg |
|||
|
Technical parameters |
|||||
|
Length(Without Bit) |
Weight |
External diameter |
Connection Thread |
Bit Shank |
Hole Range |
|
1122mmmm |
70.5Kg |
Φ126mm |
API2 3/8"REG |
M50 |
Φ136-Φ155mm |
|
Working pressure |
Recommended rotation speed |
Air Consumption |
|||
|
1.0Mpa |
1.8Mpa |
||||
|
1.0-2.5Mpa |
30-60 r/min |
7m³/min |
13m³/min |
||
Core Performance Features
- Powerful impact
- Durable structure
- Efficient slag discharge
- Strong adaptability
- Easy maintenance
Application Scenarios
- Water well drilling
- Mining operations
- Foundation engineering
- Geotechnical exploration
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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