NSD5A DTH Hammer Technical Data
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Length (Less bit)
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Weight (Less bit)
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External diameter
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Bit Shank
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Hole Range
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Connection Thread
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1090mm
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70.00kg
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Φ125mm
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SD5
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Φ135-Φ155
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API2 3/8”Reg API3 1/2”Reg
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Working Pressure
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Impact rate at 1.7Mpa
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Recommended rotation speed
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Air consumption
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1.0Mpa
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1.8Mpa
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2.4Mpa
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1.0-2.5Mpa
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28HZ
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20-35r/min
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7m³/min
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14m³/min
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19m³/min
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Item Description
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Weight (kg)
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Part Number
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1. Top Sub
2. “O” Ring of Top Sub
3. Check Valve
4. Spring
5. Air Distributor
6. Internal Cylinder
7. Piston
8. External Cylinder
9. Guided Sleeve
10. “o” Ring of Stop Ring
11. Stop Ring
12. Drive Chuck
13. Drill Bit
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13.70
0.015
0.70
0.10
2.00
2.80
15.00
24.00
2.60
0.01
0.50
7.50
16.00
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NSD5A01
NSD5A02
NSD5A03
NSD5A04
NSD5A05
NSD5A06
NSD5A07
NSD5A08
NSD5A09
NSD5A10
NSD5A11
NSD5A12
NSD5A13
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It has the following advantages:
1. Out of the trouble of foot valve fracture and expansion and contraction.
2. Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than the one with foot valve.
3. Simple structure, reliable parts, long life, easy and cheap maintenance.
4. Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.