Low Air-Pressure DTH Hammer

Short Description:

The down-the-hole dth hammer is a device that uses compressed air as a power source and uses the reciprocating motion of the piston in the hammer to impact the drill bit to break the rock. The down-the-hole dth hammer is a working device of the down-the-hole drill.


Product Detail

Product Tags

The down-the-hole dth hammer is a device that uses compressed air as a power source and uses the reciprocating motion of the piston in the hammer to impact the drill bit to break the rock. The down-the-hole dth hammer is a working device of the down-the-hole drill. According to the working pressure of the dth hammer, it can be divided into low-pressure dth hammer (working pressure is 0.5~0.7Mpa), medium-pressure dth hammer (0.7~1.2Mpa) and high-pressure dth hammer(above 1.2Mpa); according to the gas distribution method and structural characteristics of the dth hammer, it can be divided into valved and valveless types; according to the formation of the central through hole of the down-the-hole dth hammer, it can be divided into ordinary down-the-hole dth hammer and reverse circulation down-the-hole dth hammer.

Application :

It is widely used in large-scale open-pit and underground ore mining, anchoring engineering, quarrying and rock drilling, water well geothermal mining, construction engineering rock drilling and large-scale engineering construction, etc.

Features

1 The operating air pressure are between 0.5Mpa and 0.7Mpa
2 Valveless hammers.
3 Simple structure, easy to assemble and to disassemble, long life span.
4 Higher impact frequency and faster drilling speed.
5 Lower air consumption and lower oil consumption. A hole can be drilled on the check valve to provide more efficient cuttings discharge.
6 Especially suitable for quarrying.

Low Air-Pressure DTH Hammer1
Model L2.5 L3 L30 L40
Item Description Weight (kg)      
Top Sub 2.03 2.89 2.75 4.7
Check Valve Head 0.01 0.01 0.01 0.005
Check Valve Bond 0.02 0.02 0.02 0.044
Spring 0.01 0.01 0.01 0.01
Washer 0.02 0.01   0.102
Spacer 0.01 0.01 0.01  
Cap 0.24 0.43 0.07 0.1
Grub Screw   0.01 0.01  
Spool 0.04 0.01    
Sellock Pin 0.01      
Disc Valve 0.03 0.05    
Location PIN   0.01    
Air Distributor 0.81 1.41 1.04 2.1
Inner Cylinder 1.3 2.01 2.01 2.8
Piston 2.78 4.13 4.26 6.8
Outer Cylinder 4.64 6.62 6.2 8.6
Guide Bush 0.78 0.01   1.5
Retaining Bush 0.01   0.01 0.001
Spring 0.01 0.01 0.01 0.001
Locking Pin 0.01 0.01   0.004
Drive Sub 1.05 1.82 1.82 3.8
Retaining Pin 0.01 0.01 0.02 0.029
         
Technical Date        
Model L2.5 L3 L30 L40
Length (Without Bit) 763mm 797mm 750mm 835mm
Weight(Without Bit) 12kg 20kg 20kg 30.8kg
External Diameter Φ66mm Φ80mm Φ80mm Φ98mm
Bit Shank L2.5**CIR80 L3**CIR90 L3**CIR90 L4**CIR110
Hole Range Φ68-Φ88mm Φ90-Φ110mm Φ90-Φ110mm Φ110-Φ150mm
Connection Thread 48x10 48x10 48x10 API 2 3/8" REG
Working Pressure 0.5-0.7Mpa 0.5-0.7Mpa 0.5-0.7Mpa 0.5-0.7Mpa
Impact Rate at 17 Bar 15Hz 15Hz 15Hz 14Hz
Recommended Rotation Speed 25-40 r/min 25-40 r/min 25-40 r/min 25-40 r/min
Air Consumption 0.7Mpa: 5m³/min 0.7Mpa: 8m³/min 0.7Mpa: 8m³/min 0.7Mpa: 11m³/min

 


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