Product descriptions
Jushen applies hydraulic jacking systems in all of its tower cranes in order to increase or decrease the standard sections of the cranes' bodies. This optimizes the adjustment of height according to the building height requirements. The lifting torque of the QTZ250 tower crane is 250 tm.
We provide two types of this machine:
The 70/30 type: maximum lifting capacity of 3 tons at the maximum jib length of 70 meters, maximum lifting capacity is 12 tons.
The 70/27 type: maximum lifting capacity of 2.7 tons at the maximum jib length of 70 meters, maximum lifting capacity is 16 tons.
Technical data: | Lifting height (m) | Ratioα=2 | 51.7(fixed type)/183.7(attached type) |
| Ratioα=4 | 51.7(fixed type)/130(attached type) |
| Maximum lifting capacity (t) | 12/16 |
| Working range (m) | 3~70 |
| Total power (kW) | 80.5kW (excluding the jacking motor) |
| Working temperature (℃) | -20~40 |
Size table
| Jib length(m) | Weight (t) |
| 40 | 11.10 |
| 45 | 13.45 |
| 50 | 16.05 |
| 55 | 17.35 |
| 60 | 18.65 |
| 65 | 20.70 |
| 70 | 21.75 |
Configuration information:
(1) Hoisting mechanism:
| 70/30 | Ratio | α=2 | α=4 |
| Lifting load (t) | 6 | 3 | 12 | 6 |
| Speed (m/min) | 0~45 | 0~90 | 0~22 | 0~45 |
| Power (kW) | 55 |
| 70/27 | Ratio | α=2 | α=4 |
| Lifting load (t) | 8 | 4 | 16 | 8 |
| Speed (m/min) | 0~45 | 0~90 | 0~22 | 0~45 |
| Power (kW) | 75 |
(2) Others: | Slewing mechanism | Speed (r/min) | 0~0.7 |
| Power (kW) | 9×2 |
| Trolley mechanism | Speed (r/min) | 0~65 |
| Power (kW) | 7.5 |
| Hoisting mechanism | Speed (r/min) | 0.4 |
| Power (kW) | 11 |
| Pressure (MPa) | 30 |
Jushen is a leading construction crane manufacturer since 1974, an experienced 12T 16T QTZ250 tower crane supplier, our company design and manufacture building construction machinery and heavy engineering equipment as well as providing vertical lifting solutions for customers. With decades of experience and a wide range of metal machining and testing equipment, we can provide quality building construction crane and custom tower cranes in specific needs.
