ND85A

Feature

1 Using the latest rock drilling theory,optimizing the inside structure and the size of the air distrbution,to make the DTH hammer obtain the optimal energy transfer and make it achieve faster drilling speed and lower air consumption.

2 The top sub and the drive chuck have special thread,which can achieve an easier disassemble.


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Product Details




Parts

Weight /kg

Part No




1

Top Sub

38.5

01-SP880-01




2

O'Ring

0.02

01-SP880-02




3

Check Valve

0.65

01-SP880-03




4

Spring

0.1

01-SP880-04




5

Valve Seat 

6.2

01-SP880-05




6

Inner Cylinder

7.4

01-SP880-06




7

Piston

44.5

01-SP880-07




8

Piston Case

69.5

01-SP880-08




9

Guided Sleeve

6.1

01-SP880-09




10

Retainer Ring

1.2

01-SP880-10




11

O'Ring

0.01

01-SP880-11




12

Drive Chuck

19.3

01-SP880-12




13

Drill Bit


01-SP880-13











Technical parameters


Length(Less bit)

Weight 

Outer diameter

Connection Thread

Bit Shank

Hole Range


1354mm

193Kg

185mm

API4 1/2"REG     

 ND85A

198-254mm


Working Pressure

Recommended Rotation Speed

Air Consumption


1.8 Mpa

2.4 Mpa


1.5-3.3 Mpa

30-60 r/min  

25 m³/min

34 m³/min





Company

Company


We are located in rencheng city shandong jining province ,with workshop space of 3000 m2 and more than 50 employees.


Our company has advanced friction welding, drill pipe thickening equipment and a variety of molding technology and processing equipment. According to the customer's requirements, we can produce various specifications of the drill pipe and connecting parts of the United States standards. 





Packaging & Shipping

Packaging


Packaging





Exhibition

Exhibition


Exhibition





FAQ

1 Will you do factory testing?

Of course, we will conduct very strict testing to ensure that each product is qualified before leaving the factory and fulfilling its service mission.


2 What the exactly address of your factory?

Our company is located in shandong jining province of China.


3 Warranty terms of your machine?

One year warranty for the machine and technical support according to your needs.



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