Mining DHD340 120mm Down The Hole Drilling Hammer
Mining DHD340 120mm Down The Hole Drilling Hammer
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Basic Infomation
Place of Origin: CHINA
Brand Name: ROSCHEN
Certification: ISO
Model Number: DHD340 115 120mm
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120mm Down The Hole Drilling


DHD340 Down The Hole Drilling


120mm down hole hammer

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Product Description


 DHD340 DTH hammer DHD 340 Rock hammer for mining drilling


down the hole mining rock drilling tools

DHD340 DTH hammer advantages:

1. Optimized and robust desigh
2. superior material
3. longer life
4. less air consumption
5. 15% higher penetration speed than conventional DTH hammer in the market.

The “DTH” is the abbreviation of “Down The Hole” and sometimes it is also called “RAB” in some markets, then the “RAB” is short for “Rotary Air Blasting”.

A rotation drill rig, air compressor and the “DTH drill string” are the essential unit for DTH drilling while the “DTH drill string” is always made up of DTH drill rods, DTH hammer and DTH bits. As one of key component, the DTH hammer acts as a role of converting the air pressure to the impact energy, simultaneously transferring impact energy and rotation force to DTH bits.


ROSCHEN DTH Hammers Specifications
Hammer Size Bit Shank ROSCHEN Code Connection Thread Suitable bit Working pressure Air consumption
2" BR2 ROS 11 ROS 22 RD50 box 70-90mm 0.7-1.75Mpa 0.7Mpa 4.5m3/min
1.0Mpa 4m3/min
1.4Mpa 5m3/min
3" DHD3.5 ROS 32 API 2 3/8" Reg 90-110mm 1.0-1.5Mpa 1.0Mpa 4.5m3/min
M30 1.5Mpa 9m3/min
4" DHD340 ROS 34 API 2 3/8" Reg 110-135mm 1.0-2.5Mpa 1.0Mpa 6m3/min
SD4 1.8Mpa 10m3/min
M40 2.4Mpa 15m3/min
5" DHD350 ROS 52 ROS 54 API 2 3/8"Reg/API 3 1/2" Reg 135-155mm 1.0-2.5Mpa 1.0Mpa 9m3/min
SD5 1.8Mpa 15m3/min
M50 2.4Mpa 23m3/min
6" DHD360 ROS 62 ROS 64 API 3 1/2" Reg 155-190mm 1.0-2.5Mpa 1.0Mpa 10m3/min
SD6 1.8Mpa 20m3/min
M60 2.4Mpa 28.5m3/min
8" DHD380 ROS 82 ROS 84 API 4 1/2" Reg ¢195-¢254mm 1.0-2.5Mpa 1.0Mpa 15m3/min
QL80 1.8Mpa 26m3/min
SD8 2.4Mpa 34m3/min
10" SD10 ROS 100 API 6 5/8" Reg 254-311mm 1.0-2.5Mpa 1.0Mpa 22m3/min
Numa100 1.8Mpa 40m3/min
ROS 100 2.4Mpa 55m3/min
12" DHD1120 ROS 120 API 6 5/8" Reg 305-445mm 1.0-2.5Mpa 1.0Mpa 30m3/min
SD12 1.8Mpa 56m3/min
Numa120 2.4Mpa 78m3/min
API, Metzke, Remet , Fabe thread is available!
Any special typ shank of DTH Hammer will be available by requests.


ROS DHD340 DTH hammer technical data
Net weight Out diameter DTH hammer length without bits Frequency at 18 bar
38.00 kgs 99 mm 881 mm 31 HZ
Rec. hole size Working pressure Air consumption: M3 (CBM)/min
108mm-130mm 8 bar-30 bar @ 10 bar @18 bar @ 24 bar
5 10.2 15


As specialist manufacturer and provider of DTH drilling tools

  1. We recommend our newest generation DTH hammer which is improved by absorbing art technology.
  2. Selecting superior alloy steel and robust design. It is proved by more than thousands times of test that our newest DTH hammer has longer life .
  3. Lower air consumption and 15% higher penetration speed compared the conventional DTH hammer in the market. In addition, it can work at the air pressure from 6 Bar to 35 Bar(0.6~ 3.5Mpa).
  4. At last, we developed various type of DTH hammer which can be compatible with DHD, COP, QL, MISSION and SD shank of DTH bits and performs very well.
  5. Therefore, the newest generation DTH Hammer is very popular among our customers and has a good market share as soon as it launched in the market.

The ROS DHD series DTH hammer can fit the DTH bits with DHD shank. Due to its optimized and robust design, in addition the superior material makes the DTH hammer longer life, less air consumption and 15% higher penetration speed than conventional DTH hammer in the market.

Mining DHD340 120mm Down The Hole Drilling Hammer 0


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Contact Person : Mr. Bill, George, Michael
Tel : 13764195009
Fax : 86-021-54380177
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