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QL120 Quantum Leap Hammer Strong Performance and Affordability for Down The Hole Drilling

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QL120 Quantum Leap Hammer Strong Performance and Affordability for Down The Hole Drilling
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Model: Down The Hole Hammer, DTH Hammer
Name: Down The Hole Hammer Drilling
Drilling: Down The Hole Drilling, DTH Drilling
Use: Water Well Drilling
Hammer: QL120 DTH Hammer
Model No: Quantum Leap Down-the-hole Equipment
Series: Secoroc Down-the-hole Equipment
Series No: Quantum Leap DTH Hammer
Hammer No: QL120 DTH Hammer
Type: Quantum Leap Down The Hole Hammer
Applications: Foundation Pile Drilling
Machine: DTH Hammer Drilling Machines
Tooling: Quantum Leap Ending Explained
Origin: America West Drilling Supply
Item No: Secoroc Down-the-hole
Chinese: China Down Hole Hammer
US Hammer: America Drilling Supply DTH Hammer
High Light:

dth drilling tools


down hole hammer

Basic Infomation
Place of Origin: Germany,China
Brand Name: ROSCHEN
Certification: ISO
Model Number: 3"~30"
Payment & Shipping Terms
Packaging Details: Wooden box
Supply Ability: 1300 Per month
Product Description

QL120 Quantum Leap Hammer

QL120 Quantum Leap Hammer Strong Performance and Affordability for Down The Hole Drilling



Atlas Copco Rock Drilling Tools -

Secoroc Down the Hole Equipment


Strong Performance and Affordability


Our Quantum Leap product line is available for those seeking a good balance between strong performance and cost. This product line was the drilling industry's first hybrid combination of valve and valveless air cycle down-hole drills. Setting many industry benchmarks, the Quantum Leap line continues to offer good value.


QL120 General Specifications
Quantum Leap Hammer Model QL120 Quantum Leap Hammer
Description of Item Standard Slim
English Metric English Metric
Standard drill pipe connection (see options) 6-5/8 API reg pin 6-5/8 API reg pin
Outside diameter (inch & mm) 11.2 285 10.75 273
Length w/o bit shoulder to shoulder (inch & mm) 72.3 1,837 72.3 1,837
Length with bit extended (inch & mm) 82 2,083 82 2,083
Length with bit retracted (inch & mm) 80 2,032 80 2,032
Weight w/o bit (lb & kg) 1,430 650 1,257 571
Backhead across flats (inch) 4 x 1 AF 4 x 1 AF
Minimum bit size (inch & mm) 12.25 311 12.25 311
Maximum bit size (inch & mm) 22 559 22 559
Bore (inch & mm) 9.25 235 9.25 235
Piston weight (lb & kg) 350 159 350 159
Stroke (inch & mm) 5 127 5 127
Maximum pressure differential (psig & bar) 250 17 250 17
Maximum choke diameter (inch & mm) 0.75 19 0.75 19
Make-up torque (ft-lb. & N-m) 12,000 16,248 12,000 16,248
Shank style QL120 QL120


QL120 Quantum Leap Hammer Air Consumption:
Description Standard
100 psi/6,9 bar (scfm & l/s) 804 379
blows per minute 585
150 psi/10,3 bar (scfm & l/s) 1,248 589
blows per minute 695
200 psi/13,8 bar (scfm & l/s) 1,680 792
blows per minute 805
250 psi/17,2 bar (scfm & l/s) 2,100 990
blows per minute 915
300 psi/20,7 bar (scfm & l/s) 2,508 1,183
blows per minute 1,025
350 psi/24,1 bar (scfm & l/s) 2,904 1,370
blows per minute 1,135
Above specifications/ratings are based on initial factory setting.


Shank can be available:


1) Diameter 64mm-70mm shank Bulroc BR1

2) Diameter 70mm-95mm shank Halco MACH20, Bulroc BR2

3) Diameter 90mm-102mm shank COP32, COP34, Halco MACH303, M30, DHD3.5, Bulroc BR3

4) Diameter 105mm-152mm shank COP44, DHD340, Halco MACH44, SD4, M40, QL40, Bulroc BR4

5) Diameter 135mm-165mm shank COP54, DHD350R, COP54, Halco MACH50, SD5, M50, QL50, Bulroc BR5

6) Diameter 152mm-254mm shank COP64, DHD360, SD6, M60, QL60, Bulroc BR6

7) Diameter 203mm-330mm shank COP84, DHD380, SD8, QL80

8) Diameter 254mm-380mm shank SD10, Numa100

9) Diameter 305mm-508mm shank DHD1120, SD12, N120, N125

10) Diameter 405mm-864mm shank SD15, SD18

11) VKP80, VKP95, CIR90, CIR100, CIR110, CIR150, CIR200...

We can also provide related products DTH hammers, ODEX system, symmetric systems, slide block drilling systems, etc and DTH drilling pipes for various thread API REG, API IF, BECO, etc.


DTH Button Bits:



1. Button bit is well known for its high wear resistance on medium-hard to hard abrasive rock formations (between 200 MPa to 260 MPa compressive strength). Featuring spherical tungsten carbide inserts that is known to have strong configuration against carbide fracture.

2. Recommended for eliminating hole deviation

3. Widely used drifting and tunneling

4. Bit face design is ideal for medium-hard to hard abrasive rock

Shank can be available:

R25/R32 button bits: From 41mm to 115mm

T38/R38 button bits: From 57mm to 89mm

T45 button bits: From 70mm to 105mm

T51 button bits: From 89mm to 127mm

ST58 button bits: From 89mm to 127mm

GT60 button bits: From 102mm to 152mm

EL68 button bits: From 115mm to 152mm

ST68 button bits: From 115mm to 152mm

Buttons shape: Domed, spherical, parabolic (semi-ballistic), ballistic

Face shape: Flat face, drop center, uni-face;

Skirt type: Normal, retract, straight retract face


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: ;


Website: ; ; ;

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Get in touch with us
Contact Person : Bill, George, Michael
Tel : 8613764195009
Fax : 86-021-54380177
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