ND55A 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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1110mm
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69.00kg
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Φ125mm
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Cop54 DHD350R
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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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7 m³/min
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14 m³/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
6.50
16.00
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ND55A01
ND55A02
ND55A03
ND55A04
ND55A05
ND55A06
ND55A07
ND55A08
ND55A09
ND55A10
ND55A11
ND55A12
ND55A13
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