STC250T5

Strong boom  
 41m telescopic boom in five sections lifts to a new height of 41.5m, and further to 49m with jib mounted.  

Larger cross-section boom, achieving a load moment of 1078KN·m.  

Boom section overlap increased, resulting in higher torsion resistance and bending resistance. 

Powerful chassis
DF Cummins ISLe290 30 engine, FAST 9-speed synchronizing gearbox, rubber suspension, 12R22.5 wire tire.   

Frame torsion resistance verified by 20k times of reliability and safety cycling test. 

Outrigger span expanded to 5.18m×6.4m, providing a stable base.   

Low deck chassis enhances travelling stability. 

Precise hydraulics
Better maneuverability : smart flow-distribution hydraulic system secures combined action efficiency and stability.  

Precise motion: single rope can move stably at a min. speed of 1.2m/min and slewing can be slower to 0.1°/s , realizing micro-motion of millimeter level.  

Dynamically adjustable luffing down: Passive luffing down with speed limit provides safe and stable operation, while active luffing down at big boom angle optimizes efficiency.   

Power control: Engine speed reduced by 12% in operation, less fuel needed, less noise generated.