Tower Crane TC7021 Size 70M Max Working Range

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Feature: Tower Crane                          Condition: New                                           Max.Lifting Load: 8T

Span: 70m                                             Place of Origin: China(Mainland) 

Brand Name: CMAX                              Model Number: TC7021         


Packaging & Delivery

Packaging Detail: Nude package          Delivery Detail: 25-30days




● Max. working range 70m, tip lifting weight 2.1T and Max. lifting weight 12T.

● Slewing mechanism and trolleying mechanism all take VFD+PLC technical control.

● Outstanding in working efficiency, operating speed and stability. Reduce future maintenance cost.





Q: What is the difference between CNBM and CMAX?

A: CNBM stands for China National Building Materials (Group) Corporation, which is established in 1984, is the largest state-owned group corporation of building material & machinery with a total asset of 15 billion USD and a staff of 100000.

CMAX is the brand name of CNBM Group’s construction products, C stands for China and Max stands for Maximum.


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.

Second, we need to know what the foundation requirement from the client is. (Fixed/undercarriage/ undercarriage with traveling system), mast section type (panel/integrated), power supply source (voltage, ampere and frequency), the distance between the machine and power supply……

Third if there are special needs, CNBM could suggest proposal according to clear data provided by the clients. End-user, as construction machinery buyer, knows the site situation well and should make decision, such as the machinery specification, type…….


Q: What about our tower crane's warranty?

A: Usually there is one-year quality warranty including main electronic parts (not including consumable parts). There are consumable spare parts together with whole machine and normally they are enough for one year.


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

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


Q: Can you equip with light on tower crane jib, monitor, remote control and anemometer?

A: Sure. All of these could be provided with extra cost upon the clients’ requirements. But according to general practice, remote control is not suggested because most of the operator feedback operation in the cabin will provide a wide working view.




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Q:what are The performance parameters of tower cranes?
The technical performance of tower crane is expressed in a variety of parameters, the main parameters include the range, starting weight, lifting torque, free height, maximum heightand so on; its general parameters are: a variety of speed, structure, weight, size, tail size and gauge wheelbase, etc.
Q:Moment Problem, Help! A crawler crane of 10,000N weight, has a 20-M boom weighing 1000N acting midway....?
Q:How do you build a crane!?
Carefully. has kit numbers and downloadable instructions for many Lego cranes. You might be able to find some of them on OKorder. You may not need to actually build the Lego crane. Instead, look at the model, determine the major pieces (wheels, turntable, arm, etc.). Then, look at your bundle of pieces and make something with the same function.
Q:What is the difference between lifting height of tower crane and independent height?
Of course there is a difference. Independent height refers to the highest height of tower crane in its free state. Lifting height refers to the height of actual tower crane design.
Q:folding paper cranes?
You can send her a few NICE paper cranes and write her a nice letter, it's the thought that counts.
Q:What is a safe working Area for a crane when at work and how it is calculated with different size of Cranes.?
each crane is so different. it depends on the rated crane load, the lifted distance from the crane and actuall load to be lifted. Each crane an envelope of angles to the horizontal, lifted load, and distance from the crane. The crane operator must insure that he is within this envelope or the crane may topple over. Also, the wind at the time of the lift must be considered. If you can picture a seesaw with loads pivoting about a fulcrum. When two people are on the seesaw, one person is the crane and the other is the load to be lifted. Only in the case of a crane, the fulcrum is at the crane itself with a large dead load counter weight behind the cab operator.
Q:is this a grey crowned crane?
yes the bird is a grey crown you can see it has a red spot on the neck...and a large hairy looking also has a white skin cheek patch.
Q:Tower crane 5610 why is it called QTZ63?
Q is reusable, T is tower, Z is jack up, and combined is jack up tower crane. (this is the earliest known China, now the various manufacturers have their own name, some close to the French take, such as F0/23B, the tower jib 50 meters, a maximum weight of 10 tons, 2.3 tons of weight lifting arm tip)80 is the moment, the unit is t * m, (should say is the force multiplied by distance, 800kn.m) for 5613 cranes, the maximum lifting capacity of 8 tons, the boom length is 56 meters, arm tip lifting weight 1.3 tons, maximum weight in the range of 2.5 meters ---13 meters, calculation of 8 * 13=104, so the name is QTZ104, now the provisions should be a QTZ104, but before, people think is 8 tons of weight, so called QTZ80, is now available.
Q:Whooping Crane or Whopping Crane?
Whooping crane, largest bird in North America, named so for its call.
Q:On Batman Begins what is Dr. Crane's full name?
johnathan middle was mentioned..if i'm not mistaken...

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