4 Inch High Air Pressure Down The Hole DTH Hammer(Mission40/NM4A)

Specifications

Down The Hole hammer drill
1.Lower energy consumption
2.Higher impact frequency
3Easy& cheap maintenance
4Long life,reliable

4 Inch High Air Pressure Down The Hole DTH Hammer(Mission40/NM4A) :

1. 10 years manufacturing experience;

2. Certificate: ISO9001:2008

3. Material: Carbide

It is a kind of high air pressure DTH Hammer without foot valve, 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.

Length (Without Bit)	Weight (Without Bit)	External diameter	Bit Shank	Hole Range		Connection Thread
1005mm	40.00kg	99mm	HM4	110-135		API2 3/8Reg
Working Pressure	Impact rate at 1.7Mpa	Recommended rotation speed		Air consumption
				1.0Mpa	1.8Mpa		2.4Mpa
1.0-2.5Mpa	30HZ	25-40r/min		5m³/min	9m³/min		14m³/min

Item Description	Weight (kg)	Part Number
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	6.50 0.01 0.35 0.05 1.50 2.10 8.50 14.80 1.80 0.005 0.30 3.80 6.60	NM4A01 NM4A02 NM4A03 NM4A04 NM4A05 NM4A06 NM4A07 NM4A08 NM4A09 NM4A10 NM4A11 NM4A12 NM4A13

Packing: Inner package with cartons,outer package with wooden case

Delivery: in 20 working days after receiving the advance payment

Our advantages:

We have advanced production equipments & talented researchers & technicians & rich experiences in R & D and production.
We use the best quality raw materials.
We adopt advanced production technology & strict testing procedure.
We passed ISO9001 quality management system certification.
We accept OEM manufacturing and produce on your design.