DTH hammer is used for drilling holes through a wide range of rock types, the variety of which continues to extend well beyond the original conception of early blast hole drilling.
Down-the-Hole refers to where the hammer action occurs when compared to drifter hammers, which hammer on top of the drill string. The DTH hammer piston always makes direct contact with the drill bit and there is generally no loss of transmitted energy as the hammer drills deeper, as is the case with drifter (top hammer) rigs.
Roschen offers a wide range of DTH hammers suitable for a variety of drilling operations. Our Down the Hole hammers provide the most versatile and cost effective rock drilling method.
| 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 |
| COP32/COP34 |
| M30 |
1.5Mpa |
9m3/min |
| 4" |
DHD340 |
ROS 34 |
API 2 3/8" Reg |
¢110-¢135mm |
1.0-2.5Mpa |
1.0Mpa |
6m3/min |
| COP44 |
| QL40 |
| 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 |
| COP54 |
| QL50 |
| 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 |
| COP64 |
| QL60 |
| 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 |
| COP84 |
| QL80 |
1.8Mpa |
26m3/min |
| SD8 |
2.4Mpa |
34m3/min |
| M80/M85 |
| 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: |
| API, Metzke, Remet , Fabe thread is available! |
| Any special typ shank of DTH Hammer will be available by requests. |
| ROSCHEN DTH Bits Specifications |
| Hammer Size |
Bits diameter |
Shank |
ROSCHEN CODE |
| Metric |
Inch |
| 1" |
64mm-70mm |
2 1/2"-2 3/4" |
BR1 |
ROS 11 |
| 2" |
70mm-95mm |
2 3/4"-3 3/4" |
MACH20/BR2 |
ROS 22 |
| 3" |
90mm-102mm |
3 1/2"-4" |
COP32/COP34/MACH303 |
ROS 32 |
| M30/DHD3.5/BR3 |
ROS 34 |
| 4" |
105mm-152mm |
4 1/8"-6" |
COP44/DHD340/MACH44 |
ROS 42 |
| SD4/M40/QL40 |
ROS 44 |
| 5" |
133mm-165mm |
5 1/4"-6 1/2" |
COP54/DHD350R/MACH50 |
ROS 52 |
| SD5/M50/QL50/BR5 |
ROS 54 |
| 6" |
152mm-254mm |
4 1/8"-10" |
COP64/DHD360/SD6 |
ROS 62 |
| M60/QL60/Bulroc BR6 |
ROS 64 |
| 8" |
203mm-330mm |
8"-13" |
COP84/DHD380/SD8 |
ROS 82 |
| QL80/M80 |
ROS 84 |
| 10" |
254mm-380mm |
10"-15" |
SD10 |
ROS 100 |
| NUMA100 |
| 12" |
305mm-508mm |
12"-20" |
DHD1120/SD12 |
ROS 120 |
| NUMA120/NUMA125 |
| Notes: API, Metzke, Remet , Fabe thread is available! |
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