DTH Hammer
DTH hammer is an integral part of DTH drilling rig to connect DTH drill bit and drilling rig.
- Application field: It is widely used in metallurgy, coal, chemical industry, mining, water conservancy, hydropower, highway, railway, national defense, construction, and other engineering hole forming operations.
- Working principle: High-pressure air enters the inside of the DTH hammer through the intake valve of the DTH drilling rig and the inner hole of the drill pipe. It is divided into two ways through the air distribution valve, one way enters the bottom of the hole through the center hole of the valve seat and piston and the exhaust hole of the DTH drill bit to discharge the rock slag at the bottom of the hole, and the other way is distributed to the cylinder to make it reciprocate to realize the impact work.
It includes low wind pressure DTH hammer, medium wind pressure DTH hammer, and high wind pressure DTH hammer.
DTH hammer performance characteristics
1. The single impact energy is high, and the energy consumption for breaking rocks is low.
2. The weight ratio of the piston and the drill bit is close, and effective for a long time. It is beneficial to improve the rock crushing efficiency and prolong the life of the drilling tools.
3. The central exhaust has a good slag discharge effect and reduces the repeated crushing of rock.
4. It has a simple and reliable internal structure that is easy to assemble and disassemble, with few failures and easy maintenance.
5. The hammer has a check valve device to drill holes in the water.
6. It is always at the front end of the hole when working, and the transmission of the impact energy is not affected by the drilling depth.
Instructions for DTH hammer
1. When the DTH hammer starts drilling, the minimum impact and propulsion force should be used to make the hammer stand against the ground, and open the impact air valve to make the DTH hammer impact work, at this time the hammer does not rotate, DTH drill bit smoothly drill into the rock, and then gradually increase the impact and propulsion force.
2. The thread of the hammer is right-hand. When the rock drilling tools are in the hole, the hammer should always keep the right rotation. Reverse rotation is strictly forbidden to avoid accidents of hammer and drill bit falling into the well.
3. During drilling, keep the hole free of rock slag, and if necessary, carry out strong blowing to clear the hole.
4. When replacing the pressure line and connecting drill pipe, clean the dirt in the pressure and keep the joint of the drill pipe clean to prevent the rock slag and dust from entering the DTH hammer.
5. Reasonable lubrication is the key to ensuring long service life and high efficiency of the hammer, or else it will accelerate the wear of the hammer.
6. During drilling, the dust brought by high pressure gas, the pollution of the lubricating oil, dust and mud enter the impactor. It not only reduces the performance of the hammer but also damages the contact surface of each moving part. Therefore, regular maintenance can ensure the continuous and reliable work of the impactor and extend the service life.
| Specification | Drilling diameter | Length | Outer diameter | Weight | Working pressure | Air consumption | Connection with drill pipe | Connection thread |
|---|---|---|---|---|---|---|---|---|
| mm | mm | mm | kg | Mpa | m³/min | |||
| KQC65 | φ65~φ70 | 745 | φ61.2 | 13 | 0.5~0.7 | 2.5 | M42X10X1.5P | φ37-4 |
| KQC70 | φ72~φ74 | 803 | φ67.2 | 14 | 0.5~0.7 | 3 | M48X10X2P | φ43-6 |
| KQC76 | φ74~φ76 | 766 | φ67.2 | 15 | 0.5~0.7 | 3 | M48X10X2P | φ44-4 |
| KQC80 | φ80~φ82 | 796 | φ72 | 17 | 0.5~0.7 | 5 | API 2 3/8 Reg P | φ50-6 |
| KQC90A | φ90~φ130 | 796 | φ80.2 | 20 | 0.5~0.7 | 5.5 | M48X10X2P | φ54-6 |
| KQC110A | φ110~φ150 | 838 | φ98 | 30 | 0.5~0.7 | 11 | API 2 3/8 Reg B | φ65-6 |
| KQC150 | φ150~φ220 | 908 | φ137 | 75 | 0.5~0.7 | 17 | M76X10X3B | φ90-6 |
| KQC170 | φ175~φ250 | 1023 | φ156 | 90 | 0.5~0.7 | 19.5 | M100X28X10P | φ98-6 |
| Specification | Drilling diameter | Length | Outer diameter | Weight | Working pressure | Air consumption | Connection with drill pipe | Connection thread |
|---|---|---|---|---|---|---|---|---|
| mm | mm | mm | kg | Mpa | m³/min | |||
| KQCZ90 | φ90~φ120 | 870 | φ80.5 | 25 | 0.8~1.2 | 6 | API 2 3/8 Reg P | φ54-6 |
| KQCZ110 | φ110~φ150 | 917 | φ98 | 36 | 0.8~1.2 | 11 | API 2 3/8 Reg B | φ65-6 |
| KQCG80 | φ80~φ85 | 867 | φ71 | 19 | 0.8~2.1 | 3-12 | DZ50B | φ47-6 |
| KQCG90 | φ90~φ100 | 908 | φ81 | 21.8 | 0.8~2.1 | 4.3-14.2 | API 2 3/8 Reg P | φ53-8 |
| KQCG105 | φ105~φ130 | 1052 | φ92 | 38 | 0.8~2.1 | 3.5-18 | API 2 3/8 Reg B | φ64-8 |
| KQCG110 | φ110~φ130 | 1034 | φ98 | 39 | 0.8~2.1 | 3.5-15 | API 2 3/8 Reg P | φ64-8 |
| KQCG110A | φ110~φ130 | 994 | φ98 | 40 | 1.0~2.1 | 3.5-15 | API 2 3/8 Reg P | φ64-8 |
| KQCG115 | φ115~φ130 | 998 | φ98 | 40 | 0.8~2.1 | 3-12 | API 2 3/8 Reg P | φ67-12 |
| KQCG130 | φ130~φ152 | 1387 | φ114 | 69 | 0.8~2.1 | 5.7-18 | API 3 1/2 Reg P | φ84-8 |
| KQCG130A | φ130~φ152 | 1067 | φ118 | 60 | 0.8~2.1 | 3-14 | API 2 3/8 Reg P | φ83-12 |
| KQCG140 | φ140~φ152 | 1098 | φ124 | 74 | 1.0~2.1 | 4.5-18 | API 3 1/2 Reg P | φ84-8 |
| KQCG140A | φ140~φ152 | 1220 | φ124 | 74 | 0.8~2.1 | 46.5-18 | API 3 1/2 Reg P | φ84-8 |
| KQCG150 | φ152~φ305 | 1450 | φ136 | 126 | 1.0~2.1 | 8.5-25 | API 3 1/2 Reg P | φ99.5-8 |
| KQCG165 | φ165~φ305 | 1372 | φ152 | 92 | 1.0~2.1 | 9-26 | API 3 1/2 Reg P | φ99.5-8 |
| KQCG165A | φ165~φ203 | 1076 | φ146 | 92 | 0.8~2.1 | 6.8-20 | API 3 1/2 Reg P | φ104.4-12 |
| KQCG200 | φ203~φ350 | 1551 | φ181 | 208 | 1.0~2.1 | 12-31 | API 4 1/2 Reg P | φ128-10 |
| KQCG200A | φ203~φ350 | 1551 | φ186 | 228 | 1.0~2.1 | 12-35 | API 4 1/2 Reg P | φ128-10 |
| KQCG200B | φ203~φ254 | 1450 | φ181 | 260 | 0.8~2.1 | 9.6-25 | API 4 1/2 Reg P | φ128-12 |
| KQCG200C | φ203~φ350 | 1551 | φ181 | 228 | 1.0~2.1 | 12-31 | API 4 1/2 Reg P | φ128-10 |
| KQCG310 | φ311~φ508 | 2110 | φ275 | 670 | 1.0~2.4 | 30-78 | API 7 5/8 Reg P | φ210-12 |
More Than 50+ Companies Have Trusted Us For Quality
We are proud to provide high-quality rock drilling tool solutions that deliver reliable performance in demanding working conditions.
Rock Tools Applications
Trusted Rock Drilling Tools for Mining, Tunneling, Quarrying, and Hydropower Construction
Rock Tools in Mining
High-performance rock drilling tools for mining operations, designed to deliver fast penetration, long tool life, and lower drilling costs in hard-rock conditions.
Rock Tools in Tunneling
Reliable rock drilling tools for tunneling projects, ensuring precise excavation, safety, and efficiency across complex geological formations.
Rock Tools in Quarrying
Durable rock drilling tools for quarrying, helping you achieve clean blast holes, stable productivity, and reduced cost per meter drilled.
Rock Tools in Hydropower Project
Rock drilling tools engineered for hydropower construction, providing accurate and stable drilling for foundations, anchors, and structural support.
Quality Management Process
At Kelleg, quality control is built into every stage of production — from raw material sourcing to final inspection. Our rigorous Quality Management Process ensures stable performance, long service life, and reliable drilling results for every tool we deliver.
Supplier Management
We carefully evaluate and monitor our raw material suppliers to ensure stable quality from the very beginning of production.
Incoming Material Inspection
All incoming steel and carbide materials are strictly inspected for composition, hardness, and dimensional accuracy before entering production.
In-process Inspection
Key manufacturing steps are continuously monitored and measured to ensure every part meets design tolerances and performance standards.
Final Product Inspection
Each finished product undergoes comprehensive testing and inspection before shipment to guarantee consistent reliability on site.
Related Rock Drilling Tools
Explore our range of high-performance rock drilling tools, including DTH hammers, rock drill bits, and drill rods—engineered to maximize efficiency, durability, and productivity across mining, tunneling, quarrying, and hydropower projects.
Top Hammer Drilling Tools
High-performance top hammer drilling tools designed for surface and underground applications, delivering fast penetration and long service life in mining, quarrying, and construction projects.
DTH Drilling Tools
Durable DTH (Down-the-Hole) drilling tools engineered for deep and hard rock formations, ensuring maximum efficiency, reduced wear, and consistent performance in demanding drilling conditions.
Casing System
Reliable casing systems that provide stability and safety for boreholes, supporting smooth drilling operations while protecting equipment and maximizing productivity in various rock and soil conditions.
Request a Quote
Contact us now if you have any questions about our company and products. Any of your inquiry and suggestion will be highly appreciated. We will retain your information completely private.
