English 
Español 
Русский Drilling Rig Manufacturer in China
Jinfan middle and high pressure DTH hammer has high drilling speed, and requires the least airflow in work. With wearable piston case, this drilling tool has stable quality and long service life.
With above advantages, it is commonly used in geotechnical engineering fields for hole making in middle and high hardness rock layers.
Features
1. The DTH hammer has a strong air system which allows the hammer to use all the high pressure air for deslagging rock powder, so as to clean the hole end. By surface hardening, the service life of wearable outer tube is largely extended.
2. Air quantity adjusting system design allows the drill tool to have different air flux according to different rock hardness, abrasion resistance and drilling availability. Thus, the down-the-hole hammer can achieve to best deslagging performance and increase hole making efficiency.
3. Simple structure, less composition and wearable parts extends the service life of the DTH hammer effectively.
4. Multi-step thread is used to connect the front connector with the outer tube, which makes the uninstalling of button bit easy.
Specifications
| Model | QCG-330 | QCG-340 | QCG-350 | QCG-355 | QCG-360 | QCG-380 |
| Diameter(mm) | Φ82~85 | Φ105~130 | Φ130~152 | Φ130~152 | Φ152~305 | Φ203~350 |
| Hammer length(mm) | 867 | 1052 | 1387 | 1220 | 1450 | 1551 |
| External diameter(mm) | Φ71 | Φ92 | Φ114 | Φ124 | Φ136 | Φ181 |
| Weight(Kg) | 19 | 38 | 69 | 74 | 126 | 277 |
| Working pressure(MPa) | 0.8~2.1 | 0.8~2.1 | 0.8~2.1 | 0.8~2.1 | 0.8~2.1 | 0.8~2.1 |
| Air consumption(m3/min) | 3~12 | 3.5~18 | 5.7~18 | 6.5~18 | 8.5~25 | 12~31 |
| Impact torque(N·M) | 150 | 304 | 590 | 700 | 822 | 1560 |
| Impact frequency(Hz) | 13 | 13 | 13~24 | 13~25 | 14~24 | 14~25 |
| Rod connection thread | BOX M48.8×4.2 | BOX M76×10×3 | PIN M100×28×10 | PIN API 2-3/8" | PIN API 3-1/2 | PIN API 4-1/2" |
| Available Button Bit | Φ85; | Φ105; Φ115; Φ130; | Φ130; Φ140; Φ152; | Φ140; Φ152; | Φ152; Φ165; Φ178; Φ194; Φ203; Φ216; Φ230; Φ254; | Φ203; Φ216; Φ230; Φ254; Φ310; Φ350; |
Terms of Trade
1. MOQ: 1pcs
2. Delivery cycle: 0-7 months
3. Shipment port: Wuxi / Shanghai
4. Payment terms: Cash On Delivery
5. International markets: The United States, Mexico, Brazil, Colombia, Singapore, Malaysia, Indonesia, Australia, Russia, Ukraine, kyrgyzstan, Germany, France, Morocco, Armenia, Oman, Tanzania, Sri Lanka, India, Bangladesh, Pakistan, Congo, Sudan, and more.
Jinfan is a professional drilling rig manufacturer in China. We offer a wide range of products, including underground drilling rig, engineering crawler drilling rigs, water well drilling rigs, and more. Drilling tools and drilling accessories such as middle and high pressure DTH hammer, pulling machine and diamond bit are also available.
Company Brief: JINFAN Drilling Equipment Company is a renowned drilling rig manufacturer and supplier in China. Our most popular products include a hydraulic anchor drill rig, hydraulic crawler drilling rig, water well drilling rig, core drilling rig, in addition to a variety of related drilling tools including our DTH hammer, pulling machine, eccentric casing bit and wire-line core barrel. Our drilling machines are commonly used in GSHP systems, engineering geological investigation, water well construction, water conservation, and petroleum and natural gas exploration industries.
Middle/Low 
Middle/High 
High/Middle/Low