Product Details

Specifications

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

Product Description

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

Packaging & Shipping

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

Delivery: in 20 working days after receiving the advance payment

Our Services

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.