NM6A 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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1161mm
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90.00kg
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Φ146mm
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HM6
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Φ155-Φ203
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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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25HZ
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20-30r/min
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9m³/min
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18m³/min
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26m³/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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20.00
0.015
0.70
0.10
3.50
4.20
23.00
26.00
4.80
0.01
0.80
4.20
23.00
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NM6A01
NM6A02
NM6A03
NM6A04
NM6A05
NM6A06
NM6A07
NM6A08
NM6A09
NM6A10
NM6A11
NM6A12
NM6A13
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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.