Dahan 4t Self-Erecting Qtz50 (5008) Topkit Tower Crane

Model NO.
Tower Crane
Transport Package
40hq Container
HS Code
With a complete scientific quality management system, good quality and good faith, we win good reputation and occupied this field for Dahan 4t Self-Erecting Qtz50 (5008) Topkit Tower Crane, The product will supply to all over the world, such as: America, Niger, Russia, We welcome you to visit our company, factory and our showroom displayed various products that will meet your expectation, meanwhile, it is convenient to visit our website, our sales staff will try their efforts to provide you the best service. If you need more information, please do not hesitate to contact us by E-mail or telephone.
Shandong Dahan Construction Machinery Co., Ltd. Diamond / Audited Supplier
√√√Basic Info
Model No. QTZ50(5008)
Product Name  4-25t Construction Building Tower Crane
Application  Building,Construction 
Warranty 12 months after the tower crane was delivered the destination
Drive cab 360 Degree Full View
Jib length 50 m
Max load 4 t
Hoisting System 15 kw
Slewing System  3.7 kw
Trolley System 2.4/1.5 kw
Section size 1.5X2.2 m
Power 380V(±10%)/50Hz*

√√√Advantages Of Dahan Tower Crane
With 56,000 sets of market volume and excellent reputation, Dahan tower crane ranks the first place in China tower crane industry in the past decades. Dahan always adheres to the value that supply the most valuable tower crane and service for the customer, with the highest cost performance in the industry.

2.Dahan tower crane owns the leading technology R&D team, the product quality passed several experiments with strict testing. Otherwise, Dahan has 16 years of production technology and rich experiences in quality management. Till now, over 100 national technology patents of tower crane have been put into use already.

3.In order to guarantee the reliability of tower crane quality and reduce the cost, all raw materials are directly supplied by famous brands like Baosteel and Wisco. Raw materials for main parts such as standard section main limbs, tower caps adopt Q345B steel, thus the tensile strength increased by 30% and the tower crane becomes more safe and reliable.

4.Dahan tower crane is the enterprise which firstly started to use the robot welding lines. At present, we have a fully automatic robot welding production line for mast sections fabrication made up by more than 100 welding robots. The production line is composed with automatic material preparation, welding and maching. All main parts of Dahan tower crane use robot welding, with the most advance carbon dioxide mixed with argon gas shielded welding, it has deep depth of fusion, high quality of welding and stable performance.

5.All parts and components of Dahan tower crane use premium brands. Electric equipment with Schneider converter, aviation plug, stainless steel distribution box and three linkage console has features of low failure rate and easy installation.
Hoisting mechanism is provided by leading manufacturer Jiangte Motor or Dezhou Shengjian, all with engine oil, free maintenance, high reliability and low maintenance rate.
Slewing support uses Maanshan Fangyuan brand or Rothe Erde brand, twice tempering processing makes more smoothly operation and longer tower crane service life.

6.Attention to detail quality.  High-strength bolt adopt shipborne scale DACROMET technology. It can keep not rusted for ten years .Swiss screw-thread bolts of preload promote 30 percent than traditional bolts. Weight limiter uses the tension ring structure and cast aluminum shell used Hoisting, derricking limiting stopper to extend service life.

7.Large structures as mast section, turn able, top kit and hoisting jib adopt advanced equipment as NC machine tool, drilling machine, milling machine processing after welding. That effectively guarantees products assembly accuracy, reducing the failure rate and improving the security.

8.12 automatic spraying assembly line, the whole machine adopt impeller blasting to ensure the cleanliness of steel surface and eliminate the internal stress producing in welding process, increase the strength and steel surface hardness, increase painting adhesion. Two primer, a paint spraying technology, beautiful appearance, corrosion resistance has increased more than twice than the life of ordinary spraying process. Platform, the small car, fence and other small pieces adopt hot dip galvanized after acid phosphate treatment, rust resistance stronger.

9.Hoisting, derricking and slewing mechanism, with complete safety such as torque, weight limit. The steel wire rope broken rope device. Range of the car design against loss and broken shaft, such as tilting device. The electrical adopts overload protection, the design of PLC self-diagnosis system, its convenient to maintenance.

10.Dahan three production bases is Shandong, Hunan, Guangdong. Dahan tower crane are exported to more than 50 countries and regions. We have more than 1000 sets after-sales service network. We carried out the earliest stagnation point service mode in this tower crane industry that ensure the quality of service and efficiency. Otherwise, better to remove customers worries.

√√√Company Profile 

Dahan Construction Machinery (Group) is a large-scale enterprise group in Chinese construction machinery industry, specializing in the production of “tower cranes” and “construction elevators”, with registered capital of 20 million US Dollars, integrating research, development, production, sales, service and finance. 
Founded in November, 2000, after 18 years of rapid development, at present, the annual production capacity was over 10,000 sets and become the leading brand in tower crane and elevator industry in China.

The head office of the group is located in Hi-tech Development Zone, Jinan, China, with 3,000m3 workplaces. The production bases are separately located in Mingshui Economic Development Zone of Jinan City, Foshan of Guangzhong Province, Yiyang of Hunan Province, with total area of over 300,000 m3. At present the group has 8 production bases, 7 operation center, 8 sales companies, one finance lease company and one import & export company. 

Along with internationalization and implementation of international branding strategy, Dahan Construction Machinery (Group) has developed to be a professional, mature, healthy and highly reliable manufacturer and service provider of tower cranes and construction hoists, and will stand on the top of worlds construction machinery industry with a fire-new image.  
√√√Our Factory


√√√Our Service                      
Pre-sale Service
1. We can customize products according to clients demand. Various types of tower crane for  your  choice.
2. Good Quality & Factory Price & Quick Response & Reliable Service, are what we are trying best to offer you
3. All of our products are produced by our professional workmen and we have high efficiency sales team, you can totally trust us.
4. We have more than 20 years experience in designing and manufacturing, we cherish every order from our honored clients.

After your selection
1. We will count cheapest shipping cost and make invoice to you at once.
2. Test each machine before delivery to ensure their quality, then send out to you after your payment.

After-sale Service
1. Our engineers are available to guide the operators abroad. 
2. We are very glad that customer give us some suggestion for price and products.
3. If you have any question, please contact us freely by E-mail or Telephon

Q1:How long is our warranty?
An:twelve months.
Q2:Are we responsible for the installation?
An:Of course we support.
Q3:How long is our delivery time?
An:If production is not busy, the shortest month.
An:Yes,we can.

We can produce all kinds of models you want.

Please supply more details for us
Then we will supply best offer to you.
Looking forward to have a nice cooperation with you!
If you show interest in our product, please feel free to contact me! 

 Alan Wei