| Maximum Lifting Weight: | 4T | Maximum Lifting Height（M）: | 30m | Rated Loading Capacity: | 0.7/0.79t |
| Span: | 48/46.8m | Rated Load Moment: | 400n |
Characteristics of Tower Crane
1)This tower crane is one of the key 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) This kind of crane 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; The max. attached height can reach 180m.
3) It 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.
The range-change structure drives the dolly to change range on the horizontal arm, with good positioning performance. Planet gear decelerator is applied in the circumgyrating structure, together with moment-limiting hydraulic coupler, which can relize high load capacity, steady starting and reliable operation.
4) The crane has complete set 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, weight limiter, circumgyrating limiter, etc.
5)The machine 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 operator.
Main Technical Parameter
| QTZ40(4807/4708) Tower Crane | ||||||||||||
| Ultra-long suspension arm (48/46.8m), large coverage. Large section (1500*1500) of standard section, good rigidity, stable complete machine during hoisting, little sway. Main limb material of standard section: Large size (<140*140* 12, 160*160*12) Electrical system using high-quality domestic or imported components, stable and reliable performance. Standard section, draw bar and upper and lower turntables adopting C02 gas shielded welding, large weld penetration, little deformation. Two-speed motor or winding motor, stable and reliable starting, no shock. Hoisting mechanism with good speed regulation and stability and no lifting shock | ||||||||||||
| Load diagram | ||||||||||||
| 4807 loading capacity | ||||||||||||
| m | 12 | 15 | 22 | 25 | 30 | 35 | 38 | 40 | 42 | 45 | 48 | |
| 4t-11.38m | t | 3.778 | 2.957 | 1.912 | 1.643 | 1.315 | 1.081 | 0.97 | 0.905 | 0.846 | 0.768 | 0.7 |
| 2t-21.17m | t | 2 | 2 | 1.912 | 1.643 | 1.315 | 1.081 | 0.97 | 0.905 | 0.846 | 0.768 | 0.7 |
| 4708 loading capacity | ||||||||||||
| m | 11 | 15 | 21 | 25 | 30 | 35 | 38 | 40 | 42 | 45 | 46.8 | |
| 4t-10.96m | t | 3.986 | 2.87 | 1.996 | 1.646 | 1.34 | 1.121 | 1.017 | 0.957 | 0.902 | 0.829 | 0.79 |
| 2t-20.96m | t | 2 | 2 | 1.996 | 1.646 | 1.34 | 1.121 | 1.017 | 0.957 | 0.902 | 0.829 | 0.79 |
| Mechanism | ||||||||||||
| QTZ40 self-climbing tower crane performance parameters | ||||||||||||
| 4807 | 4708 | |||||||||||
| rated lifting moment | KN.m | 400 | 400 | |||||||||
| maximum load-lifting capacity | t | 4 | 4 | |||||||||
| load-lifting capacity of maximum range | t | 0.7 | 0.79 | |||||||||
| working range | m | 3-48 | 3-46.8 | |||||||||
| height | m | freestanding:30 attaching:120 | freestanding:30 attaching:120 | |||||||||
| hoisting speed | a=2 | m/min | 51.6/26/7.98 | 51.6/25.8/7.9 | ||||||||
| a=4 | 25.8/12.9/3.9 | 25.8/12.9/3.9 | ||||||||||
| luffing speed | m/min | 38.6/25.2 | 39.6/25.2 | |||||||||
| swing speed | r/min | 0.62 | 0.62 | |||||||||