1- Welding Manipulator Welding Column and Boom 7

Wuxi JACK Welding Manipulator,

the Best Quality and Cost Effective Welding Column Boom for Customers on Pipe/ Tank Fabrication!

Rich Supply of Wuxi JACK Column and Boom Welding Equipment

1. Function: Welding Manipulator is sharp machine tool on cylindrical parts production:
Working together with Welding Rotator, longitudinal and circumferential seams on external and internal walls of workpieces can be fulfilled in high productivity and superior quality;

2. Wuxi JACK designs and produces full range of Welding Column Boom:

1) Size: From light duty LHZ2x2, to medium duty LHZ4x4, to heavy duty large size LHZ8x8, with configurations of:
2) Base: Stationary, or in the form of motor drive movable trolly;
3) Upright column of either fixed, or of revolving capability;
4) Welding mode: SAW, GMAW, strip cladding...

Movable LHZ6050 manual revolving column with SAW for Large Tank Production

Stationary LHZ4055 manual revolving column with SAW

Movable LHZ4040 Welding Manipulator manual revolving column with SAW

Stationary LHZ3030 fixed column with GMAW for Pharmaceutical Facility

Stationary LHZ4055 manual revolving column with American Lincoln SAW

Movable LHZ3030 manual revolving column with SAW for Small Medium Pipe Production

Stationary LHZ6050 manual revolving column with SAW for Oil Pipeline Plant

Stationary LHZ8080 large Welding Column Boom of motor drive revolving column with SAW

LHZ4040 at Shanghai customer facility

Customer acceptance on LHZ3030 at Wuxi JACK workshop

LHZ6050 works at Indonesia customer facility

LHZ6060 Column and Boom Welding Equipment fabricates on large tank

Superior Quality Components of Wuxi JACK Column and Boom Welding Manipulator

Order to Delivery Full Value Chain Control: From design to validation, from official production to performance test, every step of our Welding Column Boom production is strictly planned and carefully carried out. Every component and assembly of our Column and Boom Welding Equipment has top grade quality:

1. Welding Arm and Head of Column Boom Welding Manipulator:

With welding torch and its high precision positioning sliding cross slides, welding wire feeder reel, welding wire tension adjusting mechanism, SAW welding flux hopper and recovery machine, welding control console, welding torch position laser tracking point... Every mode of welding can be carried out in user friendly manner, and gives superior performance;

2. Welding System Function Units of Welding Column Boom:

SAW (Submerged arc welding) mechanism: Welding control console, and pneumatic control on welding flux hopper

Video Graphic Monitor on Welding Point difficult to direct access by operator

Small cross slides made of high precision linear guiderail, for accurately managing on welding torch position

Welding torch swing and position tracking system

3. All Types of Welding Modes Available in Wuxi JACK Column and Boom Welding Equipment:

Single Arc SAW (Submerged arc welding)

Twin Arc SAW (Submerged arc welding)

SAW Strip Cladding (Built Up Welding)

GMAW (CO₂ Gas Metal Arc Welding)

4. Mechanical System Frame of Wuxi JACK Welding Manipulator:

Compared with other suppliers, Wuxi JACK designs and produces mechanical body of our Welding Column Boom machine tool with larger size, in more strict manufacturing process technology: Machining and rigorous heat treatment, so as to make sure high strength/ rigidity/ smooth movement and revolve/ accurate positioning:

Horizontal boom after painting

Upright column for delivery

Cross roll bearing on base bed for column revolve

Big, heavy loading and precise large cross slides between upright column and horizontal boom as moving joint

Working Videos of Wuxi JACK Welding Column Boom Equipment

Related Pages on technical introduction and videos of our Column and Boom Welding Equipment:
1) Welding Column Boom;
2) Introduction Slides on Wuxi JACK Welding Manipulator;
3) Welding Center;
4) Welding Rotator Turning Roller Bed

Category and Main Parameters of Wuxi JACK Column and Boom Welding Equipment

A. Different Way of Classifying on Welding Manipulator:

Based on below 3 technical indexes of this welding machine tool:
1. Max. loading capacity at the front end of horizontal boom:
1) Light duty --- 80kg ~ 200kg;
2) Medium duty --- 200kg ~ 400kg;
3) Heavy duty --- 400kg ~ 500kg and above;

2. Revolve Way of Upright Column in Welding Column Boom:

1) Rotating or fixed column;
2) If column has revolving function, is it motor drive or manual push;
3. Mechanical base: Stationary or moving style trolley;
4. Welding Modes: SAW/ GMAW/ Built-Up welding...

Stationary LHZ2525 Small model light duty of manual revolve

Movable LHZ3030 middle model medium duty of manual revolve

Movable LHZ6050 large model heavy duty of motorized revolve

Stationary LHZ4040 middle model medium duty of manual revolve

B. Technical Parameters of Wuxi JACK LHZ Series Welding Column Boom:

Model	LHZ2x3	LHZ3x4	LHZ4x4	LHZ4x5	LHZ5x5	LHZ5x6	LHZ6x6	LHZ7x7	LHZ8x8
Horizontal Boom Vertical Moving Stroke (mm)	2000	3000	4000	4000	5000	5000	6000	7000	8000
Boom Horizontal Moving Stroke (mm)	3000	4000	4000	5000	5000	6000	6000	7000	8000
Mechanical Bed of Welding Manipulator	Stationary Base Bed/ Moving type Trolley
Upright Column Revolve Way	Non-Revolve/ Motor Drive or Manual Push Revolve
Horizontal Boom Vertical Moving Speed (mm/min.)	Constant 1000							Constant 1500
Horizontal Boom Horizontal Moving Speed (mm/min.)	80~ 1000, A.C. inverter control							80~ 1000, A.C. inverter control
Max. Loading at Front End of Horizontal Boom (kg)	80	80 ~ 120			200		500		400
Welding Seam Tracking Range	100 ~ 200 mm
Welding Seam Tracking Speed	200~ 250 mm/min.
Welding Seam Tracking Precision	±0.25mm
Applicable Welding Mode	SAW/ GMAW: CO₂, MIG, MAG/ TIG/ Strip Cladding
Applicable Welding Material	Carbon Steel/ Stainless Steel/ Al/ Zinc

Application and Work Principle of Column and Boom Welding Manipulator

1. Usage: LHZ series Welding Column Boom is for implementing on safe/ high efficient and superior quality fabrication on cylinder working parts: Tube/ Pipe/ Tank/ Pressure Vessel...;

2. Dimension Scope of Workpieces in Welding Column Boom:

1) Pipe diameter ranges from Φ1,500mm (LHZ2020) up to Φ7,600mm (LHZ8080);
2) Finished joint pipe length varies from 1,500mm up to 15,000mm or longer, with support of its motorized movement function, and working together with self-adjustable automatic Welding Rotator;
3) Pipe wall thickness changes from several millimeters up to typical 30mm, to over 100mm;
4) Pipe weight has scope from light to heavy duty;
5) Materials of workpieces can be carbon steel/ stainless steel/ Al... etc.;
6) Loading capacity at front end of boom welding arm from 80kg to 500kg+;

3. Optional Process Technology in Column and Boom Welding Equipment:

1) Welding: All common seen welding modes: SAW (Submerged arc welding)/ GMAW (Gas metal arc welding)/ TIG/ MIG ...;
2) Painting;
3) Assembling;
4) Testing; ...
Can all be fulfilled in Welding Manipulator;

4. Welding Seams Fabricated from Column and Boom Welding Manipulator:

1) Position: On internal and external walls of pipe;
2) Orientation: Circumferential and longitudinal seam fabrication along pipe longitudinal body;
In all, covers all steps of pipe production;

5. Importance of Welding Column Boom:

1) In all, where there exists demand on pipe & tank fabrication/ joint/ manufacture, there exist extensive demand on use of this cross slides Welding Manipulator;
2) A set of Wuxi JACK exported to Russia LHZ5050 model motorized moving column and boom Welding Manipulator, is carrying out external circumferential welding, to joint 2 segments of large tank: (Fig.1)

Fig1 Column and Boom Welding Manipulator 13

6. Application Form of Column and Boom Welding Equipment:

1) Role: Welding Manipulator is one of the three most often applied Welding Equipment. The other two are: Welding Rotator (Welding Turning Roller), and Welding Positioner;
2) Running Style: Welding Manipulator usually does not operate individually. Working together with Welding Rotator (Welding Roller Bed, Turning Roll), these two types of Welding Equipment form into various configured Welding Center, to fulfil longitudinal and circumferential fabrication on internal and external walls of workpieces;
3) Application Sites: Welding Column Boom see widespread use at industries of: Petrochemical/ Oil and Gas/ Pressure Vessel/ Pipeline Construction/ Pharmaceutical/ Boiler, etc.

7. Major Work Actions in Column and Boom Welding Manipulator:

Welding operation in this cross slides Column and Boom Welding Equipment is implemented with below 3 degrees of freedom:
1) X axis (Horizontal Direction): Horizontal boom extends forward, or retracts backward along longitudinal body of workpiece (pipe). This is main operation of the Welding Manipulator equipment. On hand held pendant of the equipment, the corresponding working speed is controlled conveniently and continuously with A.C. inverter, and displayed in digital display intuitively in real time:
Operating pendant of Wuxi JACK exported to East Europe LHZ4040 model: (Fig.2)

Fig2 Welding Column Boom 48_20250106165538

2) Y axis (Vertical Direction): Horizontal boom ascends upward or descends downward along upright column, to accommodate on varied diameter of pipes. The corresponding elevation speed is usually constant;
3) Z axis (Upright Column Revolve): By means of 0° ~ 360° revolve, the reach scope of Welding Column Boom can be extended to full round scope, thus covering more workpieces for fabrication with convenient operation;
a) Motion Guidance: Both X and Y axis movement are guided with cross slides (Saddle), which is at the intersection center of horizontal boom and upright column. This is the product name “Cross slides Welding Column Boom” got from:
b) Close view on cross slides pivot of Wuxi JACK LHZ3030 model Welding Manipulator: (Fig.3)

Fig3 Column and Boom Welding Equipment 4 100_9346

c) Upright column revolve is guided precisely and smoothly with cross roll bearing: (Fig.4)

Fig4 Column and Boom Welding Manipulator 2 IMG_4960

8. Model selection on discussing proper configuration and specifications of this Wuxi JACK welding equipment is discussed in blog “Variation in Configuration of Welding Column Boom and Proper Selection”;
9. Summary slides on this type of our leading technology welding machine tool is illustrated in product page “Introduction on Wuxi JACK Column and Boom Welding Manipulator”.

Design Sketch of Wuxi JACK Column and Boom Welding Manipulator

Below is design illustration on a set of Wuxi JACK LHZ4040 model motor drive moving Welding Column Boom with manual operating revolve function:
1. Applicable Workpiece Size: The largest diameter of tanks/ pipes that can be welded in this Column and Boom Welding Equipment is Φ3,600mm;
2. Length of moving rails for Welding Manipulator is based on required max. longitudinal length of finished joint pipes. Here in this business case, the necessary max. length of moving guide rail on workshop floor is 12,000mm ~ 15,000mm;
3. Way of Operation: During work, workpiece is laid onto 2 sets of Welding Rotator turning roller. Each set has 1 driving section (motor drive) and 1 idler section welding roller bed. The integrated operating pendant can control working motions of Welding Manipulator and Welding Turning Roller as an integral machine group;
4. Welding Mode is flexible based on necessary process technology at working site of customer. The most often adopted welding modes are: SAW (Submerged arc welding)/ GMAW/ TIG/ Stap Cladding;
5. Welding Orientation on Working Parts: As shown in the above design sketch, this Wuxi JACK LHZ4040 Welding Column Boom carries out external longitudinal and circumferential welding along longitudinal body of pipe.

Cross Slides Welding Manipulator Welding Column Boom 159

Elaborate Craftmanship of Wuxi JACK Column and Boom Welding Equipment

1 Welding Manipulator Column and Boom 1 IMG_1390

2 Welding Manipulator Column and Boom 2 000_0062

3 Welding Manipulator Column and Boom 2 IMG_3288

4 Welding Manipulator Column and Boom 3 IMG_4950

5 Welding Manipulator Column and Boom 4 IMG_0676

6 Welding Manipulator Welding Column and Boom 4- IMG_9805

7 Welding Manipulator Column and Boom 8 IMG_9812

8 Welding Manipulator Welding Column and Boom 25- IMG_3544

11 Welding Manipulator Welding Column and Boom IMG_20241028_104509

Main Composition of Welding Column Boom

The Lefthand Scrolling Photos: High Quality Parts/ Components / Sub-Assemblies/ Assemblies of Wuxi JACK Welding Manipulator

Continued from the previous segment on design sketch of the machine tool,

Main Composition of Typical LHZ Models Welding Manipulator:

1. Solid Mechanical Base: Either of fixed base bed in stationary model, or of motor drive moving trolley in moving model Welding Column Boom;
2. Horizontal Boom: This is the central working hand (Manipulator) of the machine tool. It moves up and down along upright column to adjust for diameter of pipes; Moves in horizontal way in adjustable working velocity, fulfilling longitudinal welding on pipes, depending on welding torch is right above the pipe, or extended into internal of pipe;
3. Upright Column: This is the main trunk of the Welding Column Boom. Horizontal boom is assembled into it by means of large cross slides, forming into a 90° right angle “Cross” general mechanical frame structure. The upright column is perpendicular to base bed or trolley of the Welding Manipulator;
4. Large Cross Slides (Saddle): Continued from the previous paraphrase, this unit is central joint between horizontal boom and upright column, serving as critical joint: Movement of horizontal boom along the upright column is by means of guiding and transmitting through the cross slides;
5. Welding Head: This is core function unit of Welding Manipulator. All the welding function units are installed here: Torch/ Control console/ Wire feeding/ Small cross slides....

Advanced Technique of Wuxi JACK Welding Column Boom

1) Introduction: With “simple and regular” structure and appearance, there are many technical know-how embedded with this Column and Boom Welding Equipment, which distinguishes mediocre supplier from excellent supplier in the industry and market;
2) Wuxi JACK Superiority: As the prominent professional company with the most engineers in industry, Wuxi JACK developed Welding Manipulator has series of technical details, which promises on far more better and stable performance for customers. The typical leading technical features are briefly listed below:

Welding Head Mechanism in Welding Manipulator:

1. Core Function Unit: All kinds of welding modes can be carried out in our Column and Boom Welding Equipment. This is fulfilled by means of configuration and set up style of welding head at the front end of horizontal boom;

2. Common Welding Modes in Welding Column Boom:

1) Photo 1: Large welding current SAW (Submerged arc welding), 1000A ~ 1500A, for fabricating on thick wall pipes/ tubes/ tanks, that are made of carbon steel. This is the most extensively selected welding mode in the machine tool, especially on medium to heavy duty welding operation;
2) Photo 2: Delicate TIG (Tungsten Inert Gas) welding, for fabricating on thin wall pipes/ tubes/ barrels, which are made of non-ferrous metal, including stainless steel and zinc. This welding mode is usually applied in precision Machinery/ Pharmaceutical industry...;
3) Photo 3: High IK value CO₂ GMAW, for fabricating on small to medium wall thickness of workpieces, also made of carbon steel, which entails more intensity welding seam;
4) Photo 4: Strip Cladding (Hard facing), for acquiring on building up anti-corrosion layer, on external surface of workpiece. Such notch welding is with special welding head/ welding supplementary units, on the basis of SAW or GMAW;

3. Welding Head Mechanism in Column and Boom Welding Equipment:

Correspondingly, from the above 4 photos, we can see that, typical welding head of Welding Manipulator has main elements of:
1) Related Welding mode torch, including welding torch position controlling mechanism / high precision cross slides/ Welding seam tracing unit;
2) Welding wire feeder, welding wire reel, complicated welding wire tension adjustment unit (For preventing welding wires from entangle, and promising on smooth sending of welding wire during welding operation);
3) SAW welding flux system: Including welding flux hopper and its pneumatic control pressure valves/ SAW welding flux unit conveying and recycling tubes/ Welding flux recycling machine, in case of SAW (Submerged arc welding) being adopted in column and boom Welding Manipulator;
4) Control console of welding power supply, and welding seam tracking unit, for guaranteeing on consistent superior welding quality;

4. Welding Modes of Welding Manipulator with Product Section:

1) For SAW (Submerged arc welding), please check product section of “LHZ models High Efficiency Welding Manipulator with SAW”;
2) For CO₂ GMAW, please check product section of “LHZ series Precise and Efficient Welding Column Boom with GMAW”;
3) For Strip Cladding, please check product section of “LHZ series Accurate and Fast Column and Boom Welding Equipment with Strip Cladding”.

Outsourced Function Cells of Wuxi JACK Cross Slides Welding Manipulator

Background: For high efficiently put into use of Column and Boom Welding Equipment, there exist personalized demand from customers, arising from various operating process technology and condition. To best echo on varied customer requirement, series of optional outsourced function cells are available to be equipped in Wuxi JACK Welding Column Boom. The typical function cells include:
1) Welding Seam Tracing Unit, being installed on welding torch mechanism, for managing on real time position of welding torch, so as to acquire always superior welding quality;
2) Video Graphic Monitor, for real time reflecting on welding point phenomenon during welding operation, which happened at internal wall of tubes/ pipes, and difficult to be accessed by Welding Manipulator operator. This is for purpose of convenient monitor on welding progress;
3) Welding Torch Swing Unit, for managing on width of generated welding seam, so as to acquire on eligible broader welding seam cover face and fusion.

Welding Seam Tracing Unit on Welding Torch of Welding Column Boom

1. Vital Importance: Welding seam tracing unit is indispensable very useful function unit for acquiring high standard welding performance in all kinds of welding equipment;
2. Application: This function unit can be seen in every type of welding machine tool, when customer has strict requirement on welding performance. Welding seam tracing unit constitutes on closed loop control circuit, for managing on real time position of welding torch, during the welding operation period of Column and Boom Welding Equipment;

3. Working Principle of Welding Seam Tracing Unit in Welding Column Boom:

1) Position Input: Being installed at tip of welding torch, this welding seam tracing unit collects on real time position data of welding torch, all the while from inception to completion of welding job;
2) Position Mark: There is a red color laser light spot, generated from the tracing unit, intuitively indicating on real time of welding torch. Operator can easily judge, whether welding torch correctly aim on, or deflect from projected welding seam:
Red laser light spot tracing on actual position of welding torch, during welding operation in Wuxi JACK Welding Manipulator: (Fig.5)

3) Effective Control: On the basis of collected data, this welding seam tracing unit makes calculation, and sends out command in the form of welding torch displacement. Accordingly, welding torch adjusts its “proper” position to accurately focus on welding seam;
4) Command: In this way, welding torch can accurately trace on welding seam along all the while, contributing on high level welding performance of LHZ series Welding Column Boom;
4. Installing welding seam tracing unit onto welding torch of Wuxi JACK Column and Boom Welding Manipulator: (Fig.6)

Fig2 Column and Boom Welding Equipment 149

5. Equipping Welding Seam Tracing Unit in Column and Boom Welding Equipment:

1) Significance: The welding seam tracing unit is a very powerful tool for automatically guaranteeing on superior welding quality of LHZ series automatic high precision Welding Manipulator. Wuxi JACK engineering team has accumulated rich experience, on applicating this advanced technique function unit into Welding Column Boom;
2) On the other hand, guaranteeing on superior performance of the entire set of Welding Manipulator, depends on coordination of all the welding function units of the Column and Boom Welding Equipment, this is acquired by electric control system of the machinery.

Video Graphic Monitor in Column and Boom Welding Equipment

1. Necessity of Video Graphic Monitor in Welding Column Boom:

1) Blind Welding inside Tanks Internal Wall: When the Welding Manipulator is used for carrying out longitudinal and or circumferential welding seams on external and internal wall of cylindrical workpieces. Especially when welding on internal wall of workpiece, operator can not access on welding point, and directly monitor on welding operation. Such inaccessible operation belongs to blind welding;
2) Quality Risk with Blind Welding: Under such conditions, operator of Welding Column Boom is very difficult to have real time grasp on actual condition of welding point, and precisely manage on welding job. So, welding quality can not be managed effectively;
3) Necessity on Video Graphic Monitor: For this reason, to accurately implement on high level blind welding operation in the Welding Manipulator, an external surveillance unit: Video graphic monitor should be used in the welding machine tool equipment;

2. Application of Video Graphic Monitor in Welding Manipulator:

Contact Sensor

Shooting Camera

Monitor Screen

Control Probe

1) Applicable Sites: As can be found from the above 4 photos, in the case of performing internal welding on cylindrical working parts, especially for those small diameter workpieces, it is hard and dangerous for operator to have direct access on the welding torch. By this time, video graphic monitor is a hit for managing on welding process, happened in the any workpieces of which welding points hard to access in Welding Manipulator;
2) Usage: When have welding inside wall of pipes/ tanks, video graphic monitor takes videos (The above photo 2) on welding operation in real time manner, and operator of Welding Manipulator can observe on progress of welding through monitor screen (The above photo 3). The effect is clear and instantaneously. The operation is easy and intuitive;
3) Huge Contribution: With the great support of video graphic monitor, operators can precisely track on progress and condition of internal welding inside cylinders/ tanks in real time manner, monitoring on and if necessary, accurately adjusting on welding operation.

Application and Related Equipment of Column and Boom Welding Manipulator

1. Related Welding Equipment with Welding Column Boom for Pipe Production:

1) As one of the widely applied pipe tank welding equipment machine tool, column and boom Welding Manipulator usually work together with Welding Roller Bed;
2) Here, Welding Rotator is used for holding on and driving cylindric workpiece into revolve, so that carry out external and internal circumferential welding on internal and external walls of pipes/ tubes/ tanks;
3) When carry out fabrication on structure members, Welding Positioner is also necessary to collaborate with Column and Boom Welding Equipment;
4) These welding equipment usually work in the form of Welding Center;

2. The 1^st Operation Welding Equipment for Sheet Fabrication:

Edge Milling Machine: For high speed and quality cutting on X/ Y/ V/ J/ K types of welding groove on edges of sheet metal steel plate, so that subsequent bending and close gap welding for pipe production can be implemented effectively;
3. Two Important Supplementary Welding Equipment for Pipe Fabrication:
1) CNC Pipe Cutting Machine: For cutting off pipe/ cut holes in longitudinal body of pipes, and make beveling on rim of pipe, by means of Oxygen fuel flame cutting, or plasma cutting;
2) CNC Pipe Beam End Face Milling Machine: For performing end face polishing on fabricated pipes tanks.

Wuxi JACK Other Superior Welding Equipment Machine Tool

HGZ5 Self-Adjustable Welding Roller Bed of 5 Ton Loading Capacity

HGZ5 Automatic Self Adjusting Welding Turning Roller of 5 Ton Loading Tonnage

HGZ20 Automatic Self Adjust Welding Rotator of 20 Ton Loading Capacity

HGK5 Leadscrew Adjust Welding Rotator of 5 Ton Loading Tonnage

CNC-CP7-3000/12 7 Axis Large CNC Pipe Cutting Machine

CNC-DX3030 Beam Pipe Tank CNC End Face Milling Machine

HB6 Two Axis Conventional Welding Positioner of 600kg Loading Capacity

LBS3 Large L type Elevating Welding Positioner of 3 Ton Loading Tonnage

CNC-CP6-1400/12 Medium 6 Axis CNC Pipe Cutting Machine

CNC-CG4000 CNC Triple Flame Plate Cutting Machine

SXBJ-3 Double Heads Edge Milling Machine with Wuxi JACK Exclusively Owned Hydraulic Drive Plate Handling Brackets

ZHJ15 Model 3 in 1 Welded H Beam Fabrication Machine (Assembly Welding Straightening)

Other Series of Products We Own besides Welding Manipulator

MP20 Automatic Plate Butt Joining Machine with Triple Cutting

DX1520 H Beam End Face Milling Machine for Steel Structure

General Purpose Automatic Lengthwise ASM63 Angle Steel Straightening Machine

7-Axis 3000/12 Flame And Plasma Large Scale CNC Pipe Cutting Machine

Blogs of Wuxi JACK Column and Boom Welding Equipment

The Variation in Configuration of Welding Manipulator And Proper Selection
Variety and Optional Configurations of Welding Manipulator; How to Make Proper Choice on Specific Models of Welding Column and Boom Read More
Technical Features And Business Prospects of Welding Column And Boom
 Business Application of the Cross Slides Welding Column and Boom;  Technical Issues from Perspective of Designing on the Cross Slides Welding Manipulator;  Safety Issues when Putting into Use of the Cross Slides Automatic Pipe Welding Equipment;  Summary on Wuxi JACK Cross Slides Welding Column and Boom Read More
Application of Facing and Milling Center in Steel Structure Industry
What is Steel Structure Milling and Facing Center? Why there is Demand on Steel Structure Milling and Facing Center? Constitutes and Technical Overview of Steel Structure Milling and Facing Center Application Case of Steel Structure Milling and Facing Center by Wuxi JACK Read More