Valveless type hammers designed for high performance even at low operating air pressure.
Robust design without foot valve to withstand heavy-duty applications.
Maximizes energy output and significantly reduces service requirements.
Non-reversible wear sleeve for specific operational stability.
Heat-treated internal components for maximum tool longevity.
Applications
Widely used in the following industries and projects:
✔ Mine & Quarrying
✔ Road Construction & Blasting
✔ Water Well Drilling
✔ Slope Protection & Anchoring
Technical Series Available
We supply a comprehensive range of DTH hammers:
• High pressure series
• Medium pressure series
• Low pressure series
• High efficiency high pressure series
• Reverse circulation series
Type
Model
Length
Weight
External Dia. (mm)
Hole Range
(mm)
(kg)
(mm)
3.5 inch
DHD3.5
930
25
Φ82
Φ90-110
4 inch
DHD340
1030
39
Φ99
Φ110-135
SD4
1084
40.5
Φ99
QL4
1097
41
Φ99
Mission40
1005
40
Φ99
5 inch
DHD350
1214
76.5
Φ125
Φ135-155
SD5
1175
72.5
Φ125
QL5
1147
73
Φ125
Mission50
1110
68.5
Φ125
6 inch
DHD360
1248
100
Φ142
Φ155-190
SD6
1261
100
Φ142
QL6
1212
95
Φ146
Mission60
1161
90
Φ146
8 inch
D85
1492
188
Φ180
Φ195-254
SD8
1463
192
Φ180
QL8
1465
182
Φ180
Mission80
1338
176
Φ180
10 inch
SD10
1502
290
Φ226
Φ254-311
NUMA100
1510
288
Φ226
Detailed Specifications: QL40
Parameter
Specification
Hammer Length without bit
1102(mm)
Top sub thread
API 2 3/8"REG PIN
Outside diameter
99(mm)
Weight
43.7 (KG)
Bit diameter
110-135(mm)
Working Pressure
10-22(Bar)
Air consumption
5.5-10(M3/min)
Bit shank
QL40
Frequently Asked Questions
What are the main applications for QL series DTH hammers?
QL series DTH hammers are versatile tools widely used in mining, quarrying, road construction for drilling and blasting, water well drilling, slope protection, and anchoring projects.
Does the QL40 hammer require a foot valve?
No, the QL40 is a valveless type hammer designed without a foot valve. This robust design allows it to withstand heavy-duty applications while maintaining high performance.
What is the working air pressure range for the QL40 DTH Hammer?
The QL40 hammer operates efficiently within a working pressure range of 10 to 22 Bar, depending on the specific drilling requirements and rock conditions.
What hole diameter range can the QL40 hammer achieve?
The QL40 model is designed for a hole range typically between 110mm and 135mm in diameter.
How is the longevity of the internal components ensured?
All critical internal components of our QL series hammers undergo strict heat treatment control to maximize tool life and durability under harsh drilling conditions.
What types of DTH hammer pressure series are available?
We provide a full range including High, Medium, and Low pressure series, as well as specialized High-Efficiency High Pressure and Reverse Circulation series.
KAT DRILLING
