WELLD 7530-20 (L69)
20 Ton Flat Top Tower Crane

12 t maximum lifting capacity · 75 m maximum working radius · 60 m free-standing height

WELLD 7530-20

WELLD Flat Top Tower Crane

$

Trademark: WELLD
Characteristic: Tower crane
Application: Industrial construction works, other
Out-of-warranty Service: Online support
Core Component Warranty Period: 1 Year
Moving Type: Stationary
Place Of Origin: China
Warranty Period: 1 Year
Certification: CE, ISO9001
Customization: Available
Status: New

Performance parameters
Model No. 7530-20

Max. load capacity: 20 t
Max. tip load: 3 t
Working radius: 2.8-75 m
Jib length: 76.6 m
Counter-jib length: 21.8 m

Mast L69: 2 x 2 m
Free standing height: 60 m
Max. hoisting height: 321 m

Total power: 119 kW (excl. jacking mechanism)
Working temperature: -20℃～+40℃

WELLD 7530-20 (L69) - Tower Crane Load Diagram

Jib

75 m

Range (m)

2.8～16.75

20

25

30

35

40

45

50

55

60

65

70

75

Load (t)

a=4

20

16.18

12.35

9.85

8.09

6.79

5.78

4.99

4.34

3.8

3.34

2.96

2.62

a=2

10

8.47

7.17

6.16

5.37

4.72

4.18

3.72

3.34

3

Jib

70 m

Range (m)

2.8～17.26

20

25

30

35

40

45

50

55

60

65

70

Load (t)

a=4

20

16.78

12.82

10.24

8.43

7.08

6.04

5.22

4.55

3.99

3.52

3.12

a=2

10

8.81

7.46

6.42

5.6

4.93

4.37

3.9

3.5

Jib

65 m

Range (m)

3～19.55

20

25

30

35

40

45

50

55

60

65

Load (t)

a=4

16

15.58

12

9.66

8

6.77

5.82

5.06

4.44

3.93

3.5

a=2

8

7.07

6.12

5.36

4.74

4.23

3.8

Jib

60 m

Range (m)

2.8～18.41

20

25

30

35

40

45

50

55

60

Load (t)

a=4

20

18.13

13.89

11.12

9.18

7.73

6.62

5.74

5.02

4.42

a=2

10

9.56

8.11

7

6.12

5.4

4.8

Jib

60 m

Range (m)

2.8～18.41

20

25

30

35

40

45

50

55

60

Load (t)

a=4

20

18.13

13.89

11.12

9.18

7.73

6.62

5.74

5.02

4.42

a=2

10

9.56

8.11

7

6.12

5.4

4.8

Jib

50 m

Range (m)

2.8～20.81

25

30

35

40

45

50

Load (t)

a=4

20

16.11

12.96

10.74

9.1

7.83

6.82

a=2

10

9.48

8.21

7.2

Jib

45 m

Range (m)

2.8～20.99

25

30

35

40

45

Load (t)

a=4

20

16.28

13.1

10.86

9.2

7.92

a=2

10

9.58

8.3

Jib

40 m

Range (m)

2.8～21.03

25

30

35

40

Load (t)

a=4

20

16.31

13.13

9.62

9.22

a=2

10

9.6

Jib

40 m

Range (m)

2.8～21.51

25

30

35

Load (t)

a=4

20

16.77

13.5

11.2

a=2

10

Jib

30 m

Range (m)

2.8～21.67

25

30

Load (t)

a=4

20

16.91

13.62

a=2

10

WELLD 7530-20 (L69) - Tower Crane Ballast Weight

Range	Counter-jib	Weight - 5.2 t	Weight - 3 t	Amount (t)
75 m	21.8 m	5	1	29
70 m		5	1	29
65 m		5	0	26
60 m		5	0	26
55 m		4	1	23.8
50 m		4	0	20.8
45 m	18.8 m	5	0	26
40 m		4	1	23.8
35 m		4	0	20.8
30 m		3	1	18.6

WELLD 7530-20 (L69) - Tower Crane Mechanism Properties

Name	Falls	Speed	Load	Drum Capacity	Power
Hoisting	a=2	0～90 m/min	4 t	650 m	90 kW
	a=2	0～45 m/min	8 t
	a=4	0～45 m/min	8 t
	a=4	0～22.5 m/min	16 t
Trolleying	0～60 m/min				11 kW
Slewing (RCV95)	0～0.68 r/min				2 x 9 kW
Power Supply	380V/50Hz	Total Power (excluding telescoping)			119 kW

Mechanisms

Software and hardware together allow to be confident in the result. We integrate modern safety systems in all our models

WELLD Flat Top Tower Crane

Hoisting mechanism

The hoisting mechanism of WELLD tower cranes is crucial for vertical movement of loads. Its primary purpose is to lift and lower materials on a construction site. It comprises a motor, gearbox, drum, and wire rope, working in unison to provide the necessary power and control for precise and safe handling of heavy objects, enabling efficient construction processes.

WELLD Flat Top Tower Crane

Trolleying Mechanism

The trolleying mechanism of a tower crane is responsible for moving the hoist trolley horizontally along the jib. Its primary purpose is to position the lifting hook directly over the load to be lifted or the point where the load needs to be placed.This horizontal movement allows the crane operator to precisely control the placement of materials on a construction site, ensuring efficiency and safety during operations.

WELLD Flat Top Tower Crane

Slewing Mechanism

The slewing table, or slew ring, is crucial for a tower crane's operation. The primary purpose is to allow the crane's upper structure—jib, counter jib, and machinery—to rotate horizontally 360 degrees. This enables the crane to lift and place materials across a wide working radius without repositioning the entire crane.

WELLD Flat-top Tower Crane

Hydraulic Jacking Mechanism

The jacking mechanism in tower cranes facilitates self-erection. Its purpose is to progressively raise the crane's height by adding mast sections. This crucial system allows the crane to "grow" with the building it's constructing, providing the necessary lifting height for tall structures.