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Wuxi JACK I H Beam Flange Straightening Machine, 

from Medium to Heavy duty with Powerful Straightening Capacity for Customer Choice

Wuxi JACK Motor Drive and Hydraulic H Beam Straightening Machine

1. Wuxi JACK Achievement on H Beam Straightening Machinery:

1) From March 2009 to beginning of September 2026, for close to 2 decades, Wuxi JACK has provided over 300 sets of sturdy and durable H Beam Straightening Machinery to customers, which differ in structures and straightening capacity:

2) Work principle, and operation of Wuxi JACK YTJ60/ YTJ80 heavy duty Hydraulic H Beam Straightening Machine: (Fig.1, 2)

 

2. Types of Wuxi JACK I H Beam Flange Straightening Machine:

As the most extensive selling volume in product family H Beam Straightening Machinery, Wuxi JACK H Beam Flange Straightening Machine can be classified into 3 major types, differed on:
1) Straightening force: Motor drive on medium duty H Beam (Yield strength and flange thickness), or hydraulic drive on heavy duty;
2) H Beam orientation: Mainstream in vertical, and small percentage in horizontal;
3) Yield strength of H Beam: From medium level 235MPa to heavy duty 345MPa or 485MPa;
To be specifically,
1) HYJ models motor drive: For straightening on H Beam of 235MPa yield strength, flange thickness 6mm- 40mm, in vertical;
2) YTJ models hydraulic drive: For straightening on H Beam of:
a) 345MPa yield strength, flange thickness 6mm- 100mm,
b) Or ASTM A709 WTB1, Grade 50, of 485MPa yield strength, flange thickness 6mm- 80mm,
c) H Beam in vertical;
3) WJ models hydraulic drive: For H Beam of 235MPa yield strength, flange thickness 6mm- 40mm, H Beam in horizontal;
These wide variety of Wuxi JACK H Beam Straightening Machinery provides rich assortment for customer choice, and plays consistent high performance at various steel structure H Beam Production Line:

HYJ800 motor drive, the max. straightening capacity: 40mm flange thickness, 235MPa yield strength
YTJ50 hydraulic drive, the max. straightening capacity: 50mm flange thickness, 345MPa yield strength
YTJ80 hydraulic drive, the max. straightening capacity: 80mm flange thickness, 485MPa yield strength
YTJ50 Hydraulic H Beam Straightening Machine, the max. straightening capacity: 50mm flange thickness, 345MPa yield strength
WJ40 horizontal hydraulic drive, the max. straightening capacity: 40mm flange thickness, 345MPa yield strength
4 sets of motor drive type in batch production, HYJ20, HYJ40, HYJ800, the max. straightening capacity: 20mm to 40mm flange thickness, 235MPa yield strength, on small to medium H Beams
YTJ50 hydraulic drive, the max. straightening capacity: 50mm flange thickness, 345MPa yield strength
HYJ800 motor drive acting H Beam Flange Straightening Machine in operation at customer workshop, on 1,000mm web height 40mm flange thickness H Beam
YTJ40 hydraulic drive in operation at customer facility, the max. straightening capacity: 40mm flange thickness, 345MPa yield strength
YTJ80 Hydraulic H Beam Straightening Machine, the max. straightening capacity: 100mm flange thickness, 345MPa yield strength
HYJ40 motor drive at customer factory, the max. straightening capacity: 40mm flange thickness, 235MPa yield strength
YTJ80 Hydraulic H Beam Straightening Machine, the max. straightening capacity: 100mm flange thickness, 345MPa yield strength

Wuxi JACK Featured Product of Longitudinal Hydraulic H Beam Straightening Machine:

1) Function: Another widely used superior straightening machine provided by Wuxi JACK: HJ series steel structure BOX H Beam Horizontal Press Straightening Machine, which flattens out longitudinal deformation of steel structure workpieces with long length and small cross section;
2) Models: By today early September 2026, Wuxi JACK is one of very few Chinese professional producers, with technical strength and rich experience on designing and producing this BOX H Beam Lengthways Straightening Machine. Its models are denoted according to the max. delivered straightening force in unit of ton. For example, HJ300 model refers to straightening force of 300 ton, which is driven with oil cylinder:
HJ20
HJ300
HJ200
HJ300

Wuxi JACK Newly Produced Motor Drive and Heavy duty Hydraulic H Beam Straightening Machine in Year 2025 and 2026

From January 2025 to early September 2026, over the past 18 months, Wuxi JACK has distinguished performance on delivering to customers H Beam Straightening Machinery, especially in the field of heavy duty Hydraulic H Beam Straightening Machine. These machines are either in the form of part of welding H Beam Production Line, or individual equipment. Below are some business cases as examples:

1. YTJ50 Medium Heavy duty Hydraulic H Beam Straightening Machine in Spring 2025:

1) This machine was supplied to East European customer in the form of individual equipment;

2) Project Timeline on YTJ50 Hydraulic H Beam Straightening Machine:

a) Customer contacted with Wuxi JACK and asked on inquiry in December 2024;
b) Contract was signed between customer and Wuxi JACK in January 2025;
c) Production was initiated in February 2025, and finished in April;
d) The YTJ50 machine was shipped to customer in the same month;

3) Technical Specifications of YTJ50 Hydraulic H Beam Straightening Machine:

(Fig.1) 
a) H Beam yield strength:  345MPa; Tensile strength: 600MPa;
b) Flange Thickness S:   6- 50mm
c) Flange Width b:           200- 800mm
d) Web Thickness a:       6- 50mm
e) Web Height h:              200- 1500mm
f) Straightening drive power: 15 kW
g) Straightening Speed:    6000mm/min., constant
h) Hydraulic Power and Rated Pressure:  5.5KW, 25MPa
Straightening unit: Straightening roller and web alignment rollers
Painted main frame of YTJ50 before delivery
In April 2025, main machine of ready for shipment YTJ50, fixed into steel frame
Hydraulic pump station of YTJ50

2. YTJ60 Medium Heavy duty Hydraulic H Beam Straightening Machine in Summer 2025:

1) Specialty of YTJ60 Hydraulic H Beam Straightening Machine:

a) Unlike common seen YTJ60 model, this set of YTJ60 is special designed according to customer requirement on H Beam size, and operation way:
b) H Beam flange width is small, which is difficult to be straightened;
c) Flange straightening speed can be adjusted continuously via A.C. inverter, and displayed in digital:

2) Specifications of Special Design YTJ60 Hydraulic H Beam Straightening Machine:

(Fig.2) 
a) H Beam yield strength:    345MPa; Tensile strength: 600MPa;
b) Flange Thickness S:      10- 40mm
c) Flange Width b:              200- 500mm
d) Web Thickness a:          6- 20mm
e) Web Height h:                250- 1200mm
f) Straightening drive power: 15 kW
g) Straightening Speed:    6000- 9000mm/min., variable frequency drive, digital display
h) Hydraulic Power and Rated Pressure: 5.5KW, 25MPa
Close view on upper straightening roller
Straightening unit, the upper straightening rollers are conical
Assembled and painted main machine of YTJ60
Hydraulic pump station of YTJ60

3. YTJ80 Heavy duty Hydraulic H Beam Straightening Machine in Year 2026:

1) Characteristic and Application: YTJ80 is the largest model on flange straightening, for building heavy H Beams. It is not only being used in Steel Structure industry, but also Bridge Building;
2) In year 2026 until beginning of September, Wuxi JACK has delivered 5 sets of YTJ80, to customers in China, East Europe, and South America. The specifications of these YTJ80 differ slightly, according to material yield strength:

3) Workpiece Specifications of YTJ80 Heavy duty Hydraulic H Beam Straightening Machine:

(Fig.3) 
a) Flange Thickness S: (6- 80mm) for 485MPa yield strength, (6- 100mm) for 345MPa yield strength
b) Flange Width B:        160- 1000mm
c) Web Thickness A:     6- 70mm
d) Web Height H:           500- 3,000mm
e) H Beam Length:        4,000- 15,000mm
f) Straightening drive power:      26.4 kW
g) Straightening Speed:              6300mm/min., constant
h) Hydraulic Power and Rated Pressure:    5.5KW, 25MPa
On August 24th 2026, middle east customer engineer discussed together with Wuxi JACK engineer, on YTJ80 model Hydraulic H Beam Straightening Machine:
22KW Motor Reducer for driving on H Beam transportation
Straightening mechanism of YTJ80
Overall view on the assembled main frame of YTJ80
The large, solid and heavy straightening roller mechanism

Videos of Wuxi JACK H Beam Straightening Machinery

Note: Idle test at Wuxi JACK: Load test on H Beam Flange Straightening Machine need installation of its main frame into foundation. Depth of foundation is in the range of 700mm to around 1,000mm, this can not be implemented before delivery. For this reason, videos taken at Wuxi JACK on H Beam Flange Straightening Machine is in the form of idle trial run.

Technical Specifications of Wuxi JACK I H Beam Flange Straightening Machine

Below parameters table is for your quick review on Wuxi JACK different types of H Beam Straightening Machinery on flange:
List of Wuxi JACK I H Beam Flange Straightening Machine
  H Beam in Vertical H Beam in Horizontal
HYJ Series YTJ Series WJ Series
 Model  HYJ20/ HYJ40/ HYJ800  YTJ40/ YTJ50/ YTJ60/ YTJ80 WJ25/ WJ40
 Straightening source  A.C. motor drive Hydraulic oil cylinder drive Hydraulic oil cylinder
 H Beam material yield strength  235Mpa 345/ 485Mpa 235Mpa
 H Beam flange thickness   (5- 20) or (6- 40)mm (6- 40/ 50/ 60/ 80/ 100)mm (6- 25/ 40)mm
 H Beam flange width  (100- 600) or (200- 800)mm (150- 1000)mm (200- 800)mm
 H Beam web height  (150- 1500)mm (350/ 500- 3000)mm (150- 1500)mm
 H Beam length  (4000- 15000)mm (4000- 15000)mm (4000- 15000)mm
 Straightening speed  6,500/ 9,000/ 17,000 mm/min. 6,300- 9,000 mm/min. 9,000 mm/min. Efficiency: 2 pieces of H Beam to be straightened simultaneously
Motor drive straightening small model HYJ20/ HYJ40
Motor drive straightening medium duty HYJ800
Hydraulic drive straightening medium heavy duty YTJ40/ YTJ50
Hydraulic drive straightening heavy duty YTJ60/ YTJ80

Work Principle of Wuxi JACK H Beam Flange Straightening Machine

For our motor drive and hydraulic drive types of H Beam Flange Straightening Machine, its principle can be illustrated in below 4 sketches:

1. The 1st sketch: General Principle of I H Beam Flange Straightening Machine:

1) Three points being subjected to force, implemented in a confined space straightening cavity, forming squeezing effect onto both sides top surface and middle bottom surface of H Beam flange, from the 3 pieces of upper (2 pieces) and bottom (1 piece) straightening rollers;
2) Acting Element: The bottom installed solid straightening roller is larger than the 2 pieces of up installed straightening rollers. During straightening, this bottom large roller revolves without elevation, transmitting on sending forward of H Beam, which goes through the entire set of I H Beam Straightening Machinery;
3) Process Control: The straightening stroke, which is downward stroke of the 2 pieces of upper straightening rollers, generate sufficient downward pressing force onto flange of H Beam;

2. The 2nd sketch: Straightening Source in Motor Drive HYJ Series I H Beam Flange Straightening Machine:

This gives illustration on where does the straightening power come from: 2 sets of 1.5kW A.C. motor. The motors are installed in symmetry right above the 2 pieces of upper straightening rollers;

3. The 3rd sketch: Straightening Source in Medium duty Hydraulic Drive YTJ-40/ 50 I H Beam Straightening Machinery:

This gives denotation on the straightening power source in YTJ40 and YTJ50 models: 2 pieces of tailor made oil cylinders. The oil cylinders are installed in symmetry right above the 2 pieces of upper positioned straightening rollers;

4. The 4th sketch: Heavy duty Hydraulic Drive YTJ-60/ 80 I H Beam Flange Straightening Machine:

1) Due to its necessary excessive heavy straightening force involved in the flange straightening process, the role of upper and bottom straightening rollers is exchanged with respect to YTJ40/ 50 models:
2) Under the drive of oil cylinder, the bottom straightening roller props up H Beam flange in heavy force, onto middle of flange bottom surface;
3) In the straightening operation, the 2 pieces of upper straightening rollers only revolve for driving forward H Beam, no elevation.

Work Manner of Wuxi JACK I H Beam Flange Straightening Machine

Continued from the previous segment on straightening principle, in Wuxi JACK motor drive and Hydraulic H Beam Straightening Machine, flange straightening operation is carried out in the way of:

1. No.1 Photo: Straightening Cell in Vertical I H Beam Flange Straightening Machine:

1) Roller “1” corresponds with the bottom position straightening roller, and rollers “2” and “3” correspond with the 2 pieces of upper assembled straightening rollers;
2) Symmetric rollers unit “4/ 5/ 6/ 7” are alignment rollers, for supporting and correct positioning on vertical web of H Beam during straightening operation;
3) Universal Structure: Such straightening mechanism is applied in both motor drive and hydraulic drive models on flange straightening;

2. No.2 Photo: Straightening Rollers Motion Control in HYJ Models Motor Drive I H Beam Flange Straightening Machine:

1) Accommodating varied H Beam Flange Width: The distance between the left and right two pairs of web alignment rollers is adjusted manually by turning handwheel;
2) Guidance: During adjustment on the above mentioned distance, shaft boxes of the 2 pieces of upper straightening rollers slide along T slot, on work table of machine main frame;
3) Straightening Driving Force: The downward pressing of the 2 pieces of upper straightening rollers, which is the most important process control for flange straightening operation, is driven with 2 sets of 1.5kW A.C. motor;
4) Straightening Stroke Precision Control: There are measurement rulers on front wall of straightening units. These 2 rulers are assembled in left and right symmetry, to demonstrate on: The actual position of web alignment rollers span, and real time downward stroke of upper straightening rollers;

3. No.3 Photo: Straightening Rollers Motion Control in Medium duty YTJ40/50 Hydraulic I H Beam Flange Straightening Machine:

1) Accommodating on varied H Beam Flange Width: The distance between the two pairs of web alignment rollers is also adjusted by manually turning handwheel;
2) Straightening Driving Force: The down pressing movement of the 2 pieces of upper straightening roller is driven with vertical mounted oil cylinders;

4. No.4 Photo: Straightening Rollers Motion Control in Heavy duty YTJ60/80 Hydraulic I H Beam Flange Straightening Machine:

1) Swapped Straightening Action between Upper and Bottom Rollers: Different from YTJ40/ YTJ50 models, in YTJ60/80 models, straightening is by means of the upward pressing movement of the bottom straightening roller, onto middle of bottom surface of H Beam flange. This upward pressing movement is also driven with oil cylinder;
2) Swapped Transmission Action on H Beam: Meanwhile, the 2 pieces of upper straightening rollers only revolve, no elevation, forming friction force, and transmitting on H Beam forward. From this, we can see that structure of YTJ60/ YTJ80 main machine is different from YTJ40/ YTJ50;
3) Accommodating on varied H Beam Flange Width: The distance change between left and right web alignment rollers are also driven with oil cylinders. This is the unique design in Wuxi JACK heavy duty YTJ60/ YTJ80 Hydraulic H Beam Straightening Machine.

Selecting Proper Models of Wuxi JACK I H Beam Flange Straightening Machine

This should be considered on below 3 critical technical points of:
1) The max. straightening capacity and special requirement according to customer workpieces: Flange thickness and H Beam yield strength;
2) Straightening efficiency that meets customer demand;
3) Suitable purchasing budget applicable for customer expectation
Hydraulic drive YTJ80
Motor drive HYJ800
Motor drive HYJ40
Hydraulic drive YTJ50

1. The Max. Straightening Capacity and Special Requirement on H Beam Straightening Machinery:

This is weighted on the basis of:
1) The max. thickness of H Beam flange --- 40/ 50/ 60/ 80/ 100mm;
2) Yield strength of H Beam carbon steel --- Medium duty 235MPa; Heavy duty 345MPa, 485MPa;
3) Special size of H Beam --- Technical difficulty of H Beam flange not only lies in the max. yield strength and thickness of flange, but also minimum width of flange. For example, for effective operation of YTJ80, H Beam flange width should be ≧500mm;

 

2. Straightening Efficiency of Motor Drive and Hydraulic H Beam Straightening Machine:

1) Work Speed: Normally, all models of I H Beam Straightening Machinery work in constant speed, with several grades of 6,300/ 9,000/ 17,000 mm/min. --- It can be denoted by customers, which is differed from power of driving motors;
2) Comparatively, the other 2 core machines in H Beam Production Line: H Beam Assembly Machine and H Beam SAW Welding Machine, should all work in the continuously adjustable range of 240- 2400 mm/min.;
3) So, straightening station is not bottom neck in the process flow of welding H Beam Production Line. Usually one set of H Beam Flange Straightening Machine can fully meet on output requirement.

 

3. Investment Budget on I H Beam Flange Straightening Machine:

1) HYJ series (Motor drive, H Beam in vertical) has the least level quotation, and is widely applied in producing small to medium H Beams;
2) YTJ series (Hydraulic drive, H Beam in vertical) has higher quotation, and with heavier straightening capacity. Nowadays, by year 2026, because more and more heavier steel structure construction and bridge building are put into practice, customer selection on YTJ series Hydraulic H Beam Straightening Machine is on the trend of rapid increase;
3) WJ series (Hydraulic drive, H Beam in horizontal) has the highest quotation, because of its special structure and higher straightening efficiency: 2 pieces of H Beam are straightened, doubling on efficiency. However, for most majority customers, higher straightening efficiency is not necessary, because, as discussed previously, straightening station is not bottleneck in H Beam Production Line;
4) As conclusion, usually straightening efficiency is not an issue for selecting on models of H Beam Flange Straightening Machine;
5) An obvious trend over the past several years, to today year 2026 is, more and more Hydraulic H Beam Straightening Machine are selected by customer, taking precedence over motor drive HYJ series. Because more and more heavy duty large H Beam, with yield strength of 345MPa and 485MPa, and larger flange thickness (50mm to 100mm) are applied in steel structure and bridge construction field.

Engineering to Order Value Chain of Wuxi JACK I H Beam Straightening Machinery

Producing I H Beam Flange Straightening Machine

The lefthand scrolling photos: Order to Delivery of Wuxi JACK motor drive and Hydraulic H Beam Straightening Machine

 

1. Solid, Strong, Durable Upper and Bottom Straightening Rollers of Wuxi JACK H Beam Straightening Machinery:

1) These solid rollers are critical work element on flange straightening;
2) The straightening rollers are made of high strength alloy steel, precisely machined, and went thru strict control integral heat treatment: Tempered and quenched, to guarantee on its superior mechanical performance;

2. Web Alignment Rollers in I H Beam Flange Straightening Machine:

1) There are 2 pairs of web alignment rollers in flange straightening mechanism, being used for flexibly clamping on H Beam web into vertical during operation;
2) These symmetrically assembled web alignment rollers are guided precisely in bushing, on its leftward and rightward movement, to be suitable different flange width of H Beam;

3. Final Assembly on I H Beam Flange Straightening Machine:

1) As a heavy force machinery, high strength mechanical frame of machine is of vital importance, to guarantee on consistent and high level straightening performance;
2) Assembly on all assemblies/ units/ components: Straightening rollers/ Web alignment rollers/ shaft box/ T slot of work table/ Straightening unit..., are all controlled precisely with strict control tolerance, controlled with IPV (Internal process validation);

4. Painting and Final Test on I H Beam Straightening Machinery:

1) The default color of machine is JACK blue. Customer can denote on preferred color, based on your preference and company policy;
2) Testing on flange straightening performance is by means of workpiece test, within the max. rated specification of H Beam. But this can only be carried out at customer workshop.

Put into Use on Wuxi JACK I H Beam Flange Straightening Machine

Here we take the largest model YTJ80 hydraulic drive H Beam Straightening Machinery, which has rather good selling performance in the recent 2 years of 2025 and 2026 as example:

1. On Site Layout of Wuxi JACK YTJ80 Hydraulic H Beam Straightening Machine:

Wuxi JACK YTJ80 on site operation at customer facilities:

2. Mechanical Main Frame of Wuxi JACK YTJ80 Hydraulic I H Beam Straightening Machinery:

Front view on the mechanical main frame of YTJ80 in design sketch: (Fig.1)

 

Photos taken at customer facility and Wuxi JACK workshop on different models of machine:

HYJ800 ready for shipment at Wuxi JACK workshop
HYJ40 being installed at East European customer plant
Operation site of hydraulic YTJ60/ YTJ80 at customer factory
Assembled YTJ80 for middle east customer in year 2026
1) As can be seen from the above design print and photos, operating height level of Wuxi JACK H Beam Flange Straightening Machine is suitable for adult operator --- Conform to ergonomics requirement;
2) Operation is safe and convenient;
3) This is true with all the types and models of Wuxi JACK machinery and equipment.

 

3. Customer On Site Operation on Wuxi JACK I H Beam Flange Straightening Machine:

1) As can be seen from the above 1st and 2nd photos, operation on H Beam flange straightening is intuitive and user friendly. The left and right 2 pieces of upper installed straightening rollers can be adjusted either together, or one by one;

2) Process Control on Straightening Operation in Vertical I H Beam Straightening Machinery:

This mainly focus on correct modulation on below two aspects:
a) Span of the 2 pieces of upper position straightening rollers, fitting for different width of H Beam flange;
b) Downward stroke of the 2 pieces of upper position straightening rollers, based on thickness, deformation and yield strength of H Beam flange;
c) Web is aligned with 2 pairs of symmetrically assembled rollers;
3) Straightening Accuracy Control: The above two points can all be confirmed with measurement rulers being installed at straightening mechanism, as shown in the 3rd photo;
4) Straightening Passes: To straighten on the 2 pieces of flanges in one H Beam, the H Beam should go through the H Beam Straightening Machinery 2 times, with one time H Beam 180° flipping in the process;

4. Empirical Data on Operation Wuxi JACK I H Beam Flange Straightening Machine:

1) Rule of Thumb: For all models of Wuxi JACK H Beam Straightening Machinery, there is relationship between thickness and width of H Beam flange. We give these data in manual book of each model;
2) For example, below is empirical Data on operating medium duty motor drive HYJ800 model:
Flange Thickness (mm) -20 20- 30 30- 35 35- 40
Flange Width (mm) 200- 800 350- 800 550- 800 650- 800

Wuxi JACK Other Steel Structure Machines besides I H Beam Straightening Machinery

HB1500 automatic H Beam Welding Production Line
Z15 3 in 1 H Beam Assembly and Tack Welding Machine
LHA5Z H Beam Gantry SAW Welding Machine
PHJ15 model 3 in 1 H Beam Assembly Welding Straightening Machine (H Beam Fabrication Machine)
YF1520 Motor Drive Moving Hydraulic 180° H Beam Turnover Machine
DX1520 BOX H Beam End Face Milling Machine
CNC-DX3030 CNC Control BOX H Beam End Face Milling Machine
ASM200 L Angle Steel Straightening Machine

FAQ on Wuxi JACK I H Beam Flange Straightening Machine

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WUXI AMASS MACHINERY CO., LTD
WUXI JACK TECHNOLOGY CO., LTD
0510-83297829
English Language: 15852755799; 
Chinese Language: 13621515089
No. 2, Ouyang Road, Luoshe Town, Wuxi City, Jiangsu Province, China

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