1 Hoisting Mechanism 
Three-gear speed modulation by electrical motor or frequency conversion, giant winch. 

2 Rotation Mechanism 
Speed modulation with frequency conversion, stable break, accurate position, outstanding on performance and operation all around the world. 

3 Luffing Mechanism
Speed modulation with frequency conversion, less concussion, stable operation. 

4 Control System
PLC control, auto diagnosis on electric malfunction, corresponding alarm on light and sound, key components adopting international top brand product. 

5 Security & Protection Mechanism
Besides security mechanism usually used in domestic tower crane adopted, Hongda tower crane adopted lots of advanced mechanism self-developed by Hongda, to keep the security of the tower crane and convenient operation, such as unique double tighten mechanism on luffing steel cable, anti-break mechanism on sliding vehicle, anti-drop

mechanism on standard section, speedy link between rotary body, hoisting boom and balance boom. 

6 Structure
Through advenced design, mechanical-electrical integration design, CAD supporting design, optimization design, modularization design, makes Hongda tower crane's steel structure haveing outstanding intensity, firmness and anti-fatigue capability, outstanding performance and reliability. With beautiful profile, it embodies the design standard of Hongda. 

Shandong Hongda Construction Machinery Co.,ltd. is a professional manufacturer and supplier of Tower crane(Building Lifter) in China. We supply all kind of construction and engineering equipments like cover 13 series with more than 80 varieties, such as tower cranes, construction elevators, concrete mixers, concrete batchers, trailer-mounted concrete pumps, truck-mounted concrete pumps, concrete mixer trucks, concrete boom pump trucks, concrete mixing plants, asphalt mixing plants, soil cement mixing plants, mini-type excavators, hydraulic rotary drilling rigs and rubbish compression trucks. 

We assemble our quality components according to the ISO quality management system, and all our products are all manufactured in strict accordance with ISO14001 environmental management standard. As the matter those advantages, our products are widely exported to Russia, Brazil, Congo, Ghana, Nigeria, Gambia, Kenya, and Tanzania and gain high reputation among our customers. 

We offer OEM service upon request. If you need Tower Crane/Building Lifter, PLS don't hesitate to contacts us.