• Tower Crane TC7021 Construction Equipment Building Machinery Distributor System 1
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Tower Crane TC7021 Construction Equipment Building Machinery Distributor

Tower Crane TC7021 Construction Equipment Building Machinery Distributor

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Loading Port:
China main port
Payment Terms:
TT OR LC
Min Order Qty:
1 unit
Supply Capability:
5 unit/month

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Tower Crane TC7021 Description:

1.CMAX Tower Crane TC7021  is one of the main product of CNBM company, which have competitive price and excellent quality, suitable for all kinds of construction project and can work under all kinds of work condition.

2. Tower Crane TC7021 can adopts standard section hydraulic lifting and connecting, and can decide the crane height according to the actual height of the building, and at the same time the lifting capacity will not be affected.

3. Tower Crane TC7021 has high working speed, good speed-adjusting performance, steady operation and high efficiency. Three-speed motor and mono-speed ratio decelerator are applied in the lifting struction, which enables heavy load low speed and light load high speed.

4.Tower Crane TC7021  has complete set of safety devices, which can guarantee the safe and high efficienct operation of the equipment. The machine is equipped with lifting height limiter, dolly range-change limiter, moment limiter,weightlimiter,circumgyrating limiter,and so on. 

5.Tower Crane TC7021  has scientific layout and beautiful appearance. The operator's room is set independently on one side, with good vision field. It creates a good working environment for the operato.


Tower Crane TC7021  Parameter:

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

Hoisting mechanism fitted with three speed motor, stable braking and less shock when shifting.

Trolleying mechanism can provide two operation speeds.

Free standing height (m) 50

Max height with attachment (m) 200

Working range can be adjusted (m) 40、45、50、55、60、65、70

Min working range (m) 2.5

Max lifting capacity (t) 12

Tip load @ 50m (t) 2.1


Tower Crane TC7021   Packaging & Delivery:

40HQ container

20~25days after deposit


Tower Crane TC7021Diagram:

Tower Crane TC7021 Construction Equipment Building Machinery Distributor

Tower Crane TC7021 Construction Equipment Building Machinery Distributor

Tower Crane TC7021 Technical Sheet:

Tower Crane TC7021 Construction Equipment Building Machinery Distributor

Tower Crane TC7021 FAQ:

1.What is tower crane?

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.

2. What is the meaning of the tower crane’s code?

Take Tower Crane TC7021 for example, the first two letters “TC” means Tower Crane, “70”means jib length is 70 meter, and the last two letter “21” means the tip load is :2.1 ton.

3. What is the principal to quote the right tower crane to the client?

First, we need to know clients’ requirements,for example, max lifting capacity, height, tip load and jib length.. Second, we need to know what the foundation requirement from the client is and Third if there are special needs. CNBM could suggest proposal according to clear data provided by the clients.

Q: What is YOUR take on Louis Crane's idea of meduso-anthropic principle?
Well, weak- anthropic beats the hell out of strong- anthropic. One cannot, in good conscience, postulate God from the improbability of a good primordial soup kitchen, when beating the odds is the prerequisite for anything evolving sufficiently to be amazed. Life, however, plays hell with probability, because it’s possible for an improbably complex thing to create as many improbably complex things as energy allows. Introduce evolution, crank out a tool user, it gets worse. One dedicated farmer can create a vast and profoundly improbable flourishing of life. Now if we move out into the universe and find a vast and improbable flourishing, we will have cause to suspect the existence of cosmic farmers. This especially because it appears we are evolving towards that state ourselves. Dressing up this concept in pseudo science though, strikes me as a bit pretentious. Which is my take on Louis Crane's idea of meduso-anthropic principle
Q: Where can I get the tower crane manufacturing permit?
Zhengzhou China enterprise management consulting company, oh, my uncle company for tower crane manufacturing license is to find them, they are not only a team of professional, and service is very thoughtful, efficient.
Q: are parts availble for shop crane? Hydraulic ram plunger o rings has split....need part?
You okorder / and buy a whole new jack. I replace one with Northern about two years ago. I got one that pumps on the up, and down stroke. Works better than the original!
Q: When the tower crane foundation is found, what should be discontinued?
The settlement, inclination and cracking of tower crane foundation can affect the stability of tower crane and should be stopped
Q: Was it Ichabod Crane or Rory Emerald who got the jeepers creepers scared out of them by a headless horseman?
ichabod crane but he also got his head cut off by the horse man so im sure it was him pluss he was the main charachter
Q: I'm talking about one of the ones where the cabin and the worker is high up in the air. You cant exactly remove a part of the bottom of the cranes structure because it would fall on top of you but you cant remove the cabin because its so high up and what can get up that high to remove it except another crane BUT how did that get built ?Thank you.
A tower crane is usually assembled by a telescopic crane of smaller lifting capacity but greater height and in the case of tower cranes that have risen while constructing very tall skyscrapers, a smaller crane (or derrick) will sometimes be lifted to the roof of the completed tower to dismantle the tower crane afterwards. A self-assembling tower crane lifts itself off the ground using jacks, allowing the next section of the tower to be inserted at ground level.
Q: What kind of force acting in the brake system which encounter the lifting material force and to maintain its level.
Cranes work using hydraulics and cables. The cables are wrapped around pulleys and the pulley is turned using hydraulic power. The brake system is simply stopping the pulley from turning by reducing power. The hydraulic system typically will turn a series of gears which in turn spins the pulley that the cable is wrapped around. It's different than a brake system say on a car where when you hit the brakes, pads squeeze on the interior of the wheel rim slowing it down. Cranes you just reduce power and stop the pulley from turning. They also have emergency stops. Older cranes have wedges that would be released onto the cable and then the wedges would grab the cable and slip into a ring. The narrow end of the wedges would slip into the ring first and then as the wedges increased in diameter the grip on the cable would get tighter and then stop the cable from moving. They also have systems on the pulleys to stop the pulley from spinning. They essentially work the same way as a car break. When the emergency brake is triggered, pads will squeeze on the rim of the pulley to stop it. These mechanisms work by friction. They could also have holes around the pulley and a steel pin would be pushed into one of the holes to stop it from spinning. Of course if the force of the weight exceeded the strength of the pin, it would shear.
Q: I need to do a report about Stephen Crane, answering the question how did his life affect his how he wrote his books, does anyone know?
Crane is noted for his early employment of naturalism, a literary style in which characters face realistically portrayed and often bleak circumstances, but Crane emphasized impressionistic imagery and biblical symbolism rather than graphic realism. Crane's realism, writes William Peden, is often more impressionistic than photographic; his interest in psychological probing, his innovations in technique and style, and his use of imagery, paradox and symbolism give much of his best work a romantic rather than a naturalistic quality. Both realism and symbolism, the two major directions of modern fiction, have their American beginnings in Crane's work.
Q: Lets say you are calling to get a crane truck to lift something, and they have 3 sizes of crane trucks. 17T (with a 70 ft boom), 23T (with a 101 ft boom), and 35T (with a 115 ft boom).All they ask for is how high you are lifting your equipment, how far over, and how many pounds it is.How do you use this information to calculate which size crane is used?
Use trigonometry, it's a triangle of forces.
Q: I need help to find the meaning of Chinese proverb A crane standing amidst a flock of chickens.
To put it in people terms, it would be like an exceptional person standing among a lot of ordinary people (the flock or general masses). You would definitely want to be the crane in such a case.

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