Product Details

Product Description

12'' Faster Drilling Speed and Most Advanced Air DTH Hammer(NN120)

1. 10 years manufacturing experience;

2. Certificate: ISO9001:2008

3. Material: Carbide

It is a kind of valveless high air pressure DTH Hammer with foot valve.

It has the following advantages:

Valveless air distribution. More reliable.
Simple design of the piston, long life.
More efficient energy transfer, faster drilling speed, lower air consumption and lower oil consumption.
Fewer internal parts, simple structure, longer life, less failure and easier to maintain because all the parts are heat treated.

Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multi-step thread.

NN120 DTH Hammer Technical Data

Length (Less bit)	Weight (Less bit)	External diameter	Bit Shank	Hole Range		Connection Thread
1900mm	485.00kg	Φ275mm	NUMA120	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	16HZ	15-25r/min		30m³/min	56m³/min		78m³/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. Compression Buffer

7. Air Distributor

8. Internal Cylinder

9. Piston

10. External Cylinder

11. Guided Sleeve

12. “o” Ring of Stop Ring

13. Stop Ring

14. Breakout Ring

15. Drive Chuck

16. Drill Bit

70.00

0.04

0.80

3.00

0.10

1.00

20.00

23.00

125.00

170.00

18.00

0.04

4.50

0.80

49.00

120.00

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