Tower Crane for Sale 75m 360 degree rotate jib hammerhead QTZ 7550

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QTZ 7550  Description

Feature: Tower Crane

Condition: New

Application: All construction

Rated Loading Capacity: 25ton

Rated Lifting Moment: 5000KN.m

Max. Lifting Load: 25ton

Max. Lifting Height: 275m

Span: 5.7~75m

Place of Origin: Shandong, China (Mainland)

Brand Name: MEIDA

Model Number: QTZ500-7550

Certification: ISO,CE,GOST

Warranty: one year

After-sales Service Provided: Engineers available to service machinery overseas

Tower crane Material: Q345B Steel

Mast section dimension: 2.45*2.45*6.0

Trolley speed: 0~56.25m/min

Free standing height: 70m

Jib length: 75m

Rated hoisting capacity max radius: 5ton

Slewing speed: 0.7r/min

Relay elements: Schneider

Working temperature: -20~+40℃

Tower crane Color: as customers' requirement

QTZ 7550   Features

1.Thirteen years of experience in supplying new self-erecting tower crane with Huiyou Brand.

2. Export to more than 20 countries with CE/ISO/GOST Certificates.

3. Stationary/Travelling, external/ internal climbing tower crane 

4. Impeller blasting/rust protection paint

5. Advanced painting process

6. Potain masts designed with dismountable panels, making teansport easier and cheaper. 

7. New designed mast, can be used to Internal and external climbing tower crane

8. Famous brand mechanism system, Schneider Electronic control system, jiangte and jiuhe motor

QTZ 7550 Specification

 Tower Crane for Sale 75m 360 degree rotate jib hammerhead QTZ 7550

QTZ 7550  Pictures

Tower Crane for Sale 75m 360 degree rotate jib hammerhead QTZ 7550

Tower Crane for Sale 75m 360 degree rotate jib hammerhead QTZ 7550

Tower Crane for Sale 75m 360 degree rotate jib hammerhead QTZ 7550

QTZ 7550   FAQ

Q: What is 3 main mechanism of the tower crane?

A: there are trolleying mechanism/ slewing mechanism/ hoisting mechanism.


Q: What is the principal to quote the right tower crane to the client?

A: First, we need to know clients’ requirements. Normally the following information should be clarified by the client:  max lifting capacity, height (height under hook), tip load and jib length.


Q: What is tower crane?

A: Tower crane is a modern form of balance crane that consist of the same basic parts. Fixed to the ground on a concrete foundation (and sometimes attached to the sides of structures as well), tower cranes often give the best combination of height and lifting capacity and are used in the construction site.


Q: What can we do for the clients in the market and after-sale service?

A: There is branch office for us in the kingdom and she could provide any commercial assistance for the clients; our exclusive agent would fully represent lifting machinery for business communication and rapid & professional technical support.


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Q:National standards for tower cranes
GB/T 5031-2008 GB 5144-2006 tower crane safety code for tower crane safety GB mechanical and electrical equipment thirty-second 5226.2-2002 mechanical parts: requirements for hoisting machines GB 5802-1986 lifting short chain hoists and other lifting equipment for the T (8) test specification level calibration chain GB 5905-1986 hoisting machine test code and procedures GB/T 5905-2011 crane and GB/T program 5972-1986 lifting wire rope for examination and discard utility specification GB/T 5972-2006 crane wire rope inspection and scrap utility specification GB/T 5972-2009 crane wire rope maintenance, maintenance, installation, inspection and disposal GB/T 5973-1986 wire rope with wedge joint GB/T 5973-2006 wire rope with wedge joint
Q:How do tower cranes rise?
A tower crane raises weights by clicking on the reverse;Tower crane (tower crane) is called tower crane, also known as tower crane, originated in Western europe. A revolving crane mounted on top of a tall tower. The working space is large, mainly used for the vertical and horizontal transportation of materials and the installation of building components during the building construction. It consists of three parts: metal structure, working mechanism and electrical system. The metal structure includes the tower, the boom and the base. The working mechanism has four parts, lifting, luffing, turning and walking. The electrical system consists of motors, controllers, power distribution cabinets, connecting lines, signals and lighting devices, etc..
Q:What is the scrap standard of tower crane hook?
The American Standard can provide for your reference:1, hook hanging points in the effective area of cross sectional wear more than 10%, should be disabled and scrapped.2 any visible permanent deformation and cracks shall be disabled and scrapped.3, if the wear is in the same area in two directions, it should be controlled within 5%.4, any hook opening deformation is not greater than 5%, or in accordance with the manufacturer's guidelines to determine.5, hook bow hook (i.e. intermediate position hook C shape) wear amount should be less than 5%.
Q:What is the function of the balance valve in the hydraulic jacking system of tower crane?
The function of the balance valve is to maintain the balance of the oil pressure, the hydraulic oil delivery flow is stable, so that the tower crane jacket and the upper part of the lift, disassembly, standard time, lift and smooth.
Q:Tower crane 5610 why call QTZ63 tower crane, 5613 call QTZ806015, call QTZ100
As for the calculation method, the weight of a simple arm length * arm tip can not be used, because the nominal lifting torque of the tower crane is not calculated at the maximum amplitude.However, the maximum weight can be calculated by the maximum amplitude of the maximum weight, such as 5613 tower cranes, the maximum lifting capacity of 6 tons, while the maximum variable distance of 6 tons reached 15m, 60KN * 15m=800KN.m.The above is only my personal understanding of the tower crane, but I am not a professional construction machinery, the above calculations do not know whether it is reasonable, I hope to help you.
Q:What does "automatic tower crane" mean less than 100 tons per metre?
When you are working on this crane, the weight between the weight and the weight to the horizontal distance of the crane Center shall not be greater than 100 tons.For example, if the weight and crane center level distance is 10 meters, the maximum weight is 10 tons; if it is 20 meters, the maximum lifting weight is 5 tons; if it is 40 meters, the maximum lifting weight is 2.5 tons.
Q:What is a tower crane without a collector?
Without the collector, the main cable of the tower crane directly reaches the power distribution cabinet after turning.
Q:What are the main technical parameters of a tower crane?
Generally speaking, the main parameters of the tower crane are:Maximum amplitude unit MMaximum lifting height, unit MMaximum lifting torque unit KN.mMaximum lifting speed unit m/minMaximum lifting unit tRotational speed unit r/minVariable speed unit m/min or o/minWalking speed per unit m/minMotor power unit w......Please refer to the product manual.
Q:How many meters does the tower crane installation height require expert proof?
Circular of the Ministry of housing, urban and rural construction on Issuing the measures for the safety administration of sub hazardous and sub divisional projectsAnnex No. [2009]87 [Annex two]"More than a certain size of the risk of larger sub sub project scope."Three, lifting and installation, demolition works(1) lifting projects with unconventional lifting equipment and methods with single lifting weights of 100kN and above.(two) lifting equipment installation with lifting weight 300kN and above; demolition work of climbing crane within height 200m and above.The installation and disassembly of the tower crane in accordance with the provisions of the above provisions shall be verified by the expert panel.
Q:Under what circumstances does a tower crane require third party testing?
New installation, demolition, close, major transformation, the use of site work committee, the use of factories to the Technical Supervision Bureau

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