Product Details

Product Description

12 Inch High Air Pressure DTH Hammer(NN120A)

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.

NN120A DTH Hammer Technical Data

Length (Less bit)	Weight (Less bit)	External diameter	Bit Shank	Hole Range		Connection Thread
1880mm	475.00kg	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	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

25.00

0.01

4.50

0.80

48.00

164.00

NN120A01

NN120A02

NN120A03

NN120A04

NN120A05

NN120A06

NN120A07

NN120A08

NN120A09

NN120A10

NN120A11

NN120A12

NN120A13

NN120A14

NN120A15

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