DTH Air Hammer Line With High Torque Down The Hole Hammer

Product Details




DTH Air Hammer Line with High Torque Down The Hole Hammer for Blowhole Drilling


Our DTH air hammers have a unique airflow design which maximizes performance. This gives you more power down the hole, making your investment produce more in less time. The ROSCHEN down-the-hole (DTH) hammer is a pneumatically operated valveless percussion drill. As the name implies, the DTH air hammer uses air causing the piston to strike the bit producing a very high load during impact, resulting in penetration through extremely hard formations. This is a different process from the rotary drilling method, which uses weight and rotation to penetrate softer formations.

The ROSCHEN DTH hammer is capable of being mounted on many different types of drilling machines that utilize a top head or Kelly drive mounting configuration. The drill rig must be capable of maintaining a sufficient amount of air pressure and volume, lubrication, torque, rpm, hold down and hold back. Exhaust air from the hammer is passed through blowholes in the drill bit and is used to flush clean the drilled hole.

Rotation occurs from the drive motor at the top of the drill string; however, this is not to be confused with the rotary drilling method. Feed force is transmitted to the hammer via the hold down unit and the weight of the drill pipe.

The Roschen Hammer Line is designed to allow the wear sleeve to be manufactured with increased wall thickness, thus extending the service life.

The Roschen DTH hammer is used in many different applications which include but are not limited to heavy construction, mining, oil and gas, quarries, and water well.

We want to help you "hammer the competition", so contact Drill King today for your DTH air hammer.

Heavy Duty Hammer Line

Our Heavy Duty (HD) hammer is ideal for enhanced wear protection in hard, abrasive formations. For our mining customers, this is the standard hammer they prefer. The HD hammer line utilizes the same internal parts as our standard hammers, so converting between your standard hammer and HD is relatively simple.

Hammer Repair Kits – Save money and time by ordering the integral internal wear components in one easy-to-install kit. Available for every hammer. Proven to extend the life of your hammer.

Hammer Rebuild Kits – Extend the life of your hammer when you utilize our rebuild kits to replace the external parts of the hammer. Available for every hammer. This will give you maximized return on your product investment.

Hammer Seal Kits – We recommend you purchase a seal kit with every new hammer. Seals must be replaced at regular intervals to maintain air pressure and to operate your hammer efficiently.



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
Notes: Any special size of DTH bits will be available by requests.
Metzke, Remet thread is available!






Terms & Conditions of Ordering:


Quality warranty:

Our products are made of high quality steel and all spares parts are inspected strictly before shipping. We have quickly responses for your complaint and suggestion.



Using ply-wooden cases and pallet for package to protect the products and avoid the damage during transportation. Also we can customize package according to your special requests.


Production time:

Generally need 15-25 days



By air, By Express or By sea according to your requests.



1. Methods of Payment:

T/T (Telegraphic Transfer) or Western Union or L/C at sight


2. Handling time for an order

Based on order quantity, normally it takes 20 days for production.

in 3 working days after receiving the advance payment


3. Shipping way

Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air

Bulk order: we suggest by air or by sea.


4. Quality Control

We have our own experienced QC.

There will be strict inspection and testing for every order before shipping out.


5. After Services:

a. Our sales team will response for your question within 24 hours (Holidays Excluded)

b. Technical Support will be available in any time


6. Quality & Service:

A. There will be strict inspection and testing for every order before shipping out.

B. Our sales team and Technical Support will response for your question within 24 hours through skype: ROSCHEN.TOOL and WhatsApp/Wechat: +86-13764195009

C. Free replacement will provide once the failure confirmed caused or our product quality; Not satisfied with a refund.

For more information, please contact:



WeChat: +86-137 6419 5009 ; +86-135 8585 5390

WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390

Email: roschen@roschen.com ; roschen@roschen.net

Website: http://www.roschen.com ; http://www.roschen.net

http://www.roschen.cn ; http://www.roschendrill.com

http://www.roschenmining.com ; http://www.roschendrilling.com