WELLD WLC4015-6
6 Ton Luffing Jib Tower Crane

6 t maximum lifting capacity · 40 m maximum working radius · 35.1 m free-standing height

WELLD Luffing Jib Tower Crane

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Model No. WLC4015-6
Trademark: WELLD
Characteristic: Tower crane
Application: Construction of skyscrapers, construction in limited space, other
Out-of-warranty Service: Online Support
Core Component Warranty Period: 1 Year
Core Components: Bearing, Gearbox, Motor, Gear
Moving Type: Stationary
Place Of Origin: China
Warranty Period: 1 Year
Certification: CE, ISO9001
Customization: Available
Status: New

Performance parameters
Model No. WLC5023-8

Max. load capacity: 6 t
Max. tip load: 1.5 t
Working radius: 2.5-40 m

Free standing height: 35.1 m
Max. hoisting height: 122.1 m

Total power: 48 kW (excluding jacking mechanism)
Working temperature: -20℃～+40℃

WELLD WLC4015-6 - Tower Crane Load Diagram

Jib

40 m

Working Radius (m)

3.7～17.65

20

25

30

35

40

Load (t)

a=4

6

5.03

3.57

2.57

1.85

1.3

a=2

3

2.77

2.05

1.5

Jib

35 m

Working Radius (m)

3.3～17.68

20

25

30

35

Load (t)

a=4

6

5.04

3.58

2.6

1.9

a=2

3

2.8

2.1

Jib

30 m

Working Radius (m)

2.8～17.71

20

25

30

Load (t)

a=4

6

5.1

3.67

2.7

a=2

3

2.9

Jib

25 m

Working Radius (m)

2.5～17.73

20

25

Load (t)

a=4

8

5.11

3.7

a=2

4

WELLD WLC4015-6 - Tower Crane Ballast Weight

Range	Counter-jib	Weight - 5 t	Weight - 2 t	Weight - 1 t	Amount (t)
40 m	6 m	1	5	3	18
35 m		1	5	2	17
30 m		1	5	1	16
25 m		1	5	0	15

WELLD WLC4015-6 - Tower Crane Mechanism Properties

Name	Falls	Speed	Load	Drum Capacity	Power
Hoisting	a=2	0～80 m/min	1.5 t	400 m	22 kW
	a=2	0～40 m/min	3 t
	a=4	0～40 m/min	3 t
	a=4	0～20 m/min	6 t
Luffing	≤3 min				22 kW
Slewing	0～0.7 m/min				4 kW
Power supply	380V/50Hz	Total Power (excluding telescoping)			48 kW

Mechanisms

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

WELLD Luffing Jib Tower Crane

Hoisting Mechanism

The hoisting mechanism is responsible for lifting and lowering loads along the jib. It comprises robust winches, wire ropes, pulleys, and the hook block. Controlled by a dedicated hoisting motor, the system delivers sufficient power and precision, accommodating the maximum load capacities defined for various jib angles and radii. To ensure safety and efficiency, features such as variable frequency drives, overload sensors, and automatic cutoffs are integrated within the hoisting mechanism.

WELLD Luffing Jib Tower Crane

Luffing Jib

The luffing jib is the defining feature of this crane type. Unlike a horizontal-jib tower crane, the jib can be raised or lowered to change the working radius during operation.

This design is especially suitable for high-rise construction and congested job sites where available slewing space is limited. By reducing the working radius when required, the crane can operate more effectively near surrounding buildings, site boundaries and other cranes.

WELLD Luffing Jib Tower Crane

Slewing Mechanism

The slewing mechanism enables the upper structure of a WELLD luffing jib tower crane to rotate around the tower axis, allowing the crane to position loads throughout its working area.
The slewing system is designed to provide controlled and stable rotation during lifting operations. Slewing drives, motors, gear units and the slewing bearing work together to transfer rotational movement between the tower and the crane's upper structure.
The configuration and performance of the slewing system vary according to the crane model and operating requirements.

WELLD Luffing Jib Tower Crane

Counter-Jib & Machinery Platform

The counter-jib supports the counterweight system and key operating equipment of the luffing jib tower crane. Drive units, winches and electrical components are positioned on the machinery platform, while the counterweights help balance the forces acting on the main jib. The configuration of the machinery and counterweight system is selected according to the crane model, jib length and lifting requirements to maintain the required operating balance and performance.