Product Details

Product Description

12" Inch Atlas Copco DTH Hammer Used for Sale(NN125A)

1. 10 years manufacturing experience;

2. Certificate: ISO9001:2008

3. Material: Carbide

It is a kind of high air pressure DTH Hammer without footvalve, our newest design. It is also one of the most advanced DTH Hammers in the world.

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.

NN125A DTH Hammer Technical Data

Length (Less bit)	Weight (Less bit)	External diameter	Bit Shank	Hole Range		Connection Thread
1880mm	470.00kg	Φ275mm	NUMA125	Φ305-Φ445		API6 5/8”Reg
Working Pressure	Impact rate at 1.7Mpa	Recommended rotation speed		Air consumption
				1.0Mpa	1.8Mpa		2.4Mpa
1.0-2.5Mpa	20HZ	15-25r/min		28m³/min	50m³/min		71m³/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

70.00

0.04

0.80

2.00

0.10

16.00

25.00

113.00

170.00

23.00

0.01

4.00

0.80

45.00

175.00

NN125A01

NN125A02

NN125A03

NN125A04

NN125A05

NN125A06

NN125A07

NN125A08

NN125A09

NN125A10

NN125A11

NN125A12

NN125A13

NN125A14

NN125A15

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