NSD8A DTH Hammer Technical Data
|
Length (Less bit)
|
Weight (Less bit)
|
External diameter
|
Bit Shank
|
Hole Range
|
Connection Thread
|
||
|
1330mm
|
174.00kg
|
Φ180mm
|
SD8
|
Φ195-Φ254
|
API4 1/2”Reg
|
||
|
Working Pressure
|
Impact rate at 1.7Mpa
|
Recommended rotation speed
|
Air consumption
|
||||
|
1.0Mpa
|
1.8Mpa
|
2.4Mpa
|
|||||
|
1.0-2.5Mpa
|
22HZ
|
15-25r/min
|
12m³/min
|
22m³/min
|
28m³/min
|
||
|
Item Description
|
Weight (kg)
|
Part Number
|
|
1. Top Sub
2. “O” Ring of Top Sub
3. Breakout Ring
4. Check Valve
5. Spring
6. Air Distributor
7. Internal Cylinder
8. Piston
9. External Cylinder
10. Guided Sleeve
11. “o” Ring of Stop Ring
12. Stop Ring
13. Breakout Ring
14. Drive Chuck
15. Drill Bit
|
34.00
0.015
0.30
1.20
0.10
6.00
6.50
42.50
59.00
6.00
0.01
1.20
0.30
16.00
37.00
|
NSD8A01
NSD8A02
NSD8A03
NSD8A04
NSD8A05
NSD8A06
NSD8A07
NSD8A08
NSD8A09
NSD8A10
NSD8A11
NSD8A12
NSD8A13
NSD8A14
NSD8A15
|
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.