NM4A 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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1005mm
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40.00kg
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Φ99mm
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HM4
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Φ110-Φ135
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API2 3/8”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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30HZ
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25-40r/min
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5m³/min
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9m³/min
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14m³/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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6.50
0.01
0.35
0.05
1.50
2.10
8.50
14.80
1.80
0.005
0.30
3.80
6.60
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NM4A01
NM4A02
NM4A03
NM4A04
NM4A05
NM4A06
NM4A07
NM4A08
NM4A09
NM4A10
NM4A11
NM4A12
NM4A13
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