Slewing mechanism RCV slewing mechanism adopts stepless speed control with advanced electrical adjustment and eddy brake, with slight impact, running stably and locating more precisely. It is composed of Y or YD series multi-speed motor, speed reducer and driving gear. RVF series are variable frequency control slewing mechanism, with the same structure as RCV. It has the advantage of high working efficiency, long service life, low maintenance cost, comfortable operation and so on.

The slewing mechanism mainly consists of wound-rotor motor, starting variable resistance box, hydraulic coupling, electromagnetic brake, rotary limiter, planetary reducer, pinion and pedestal. It has compact structure, large transmission ratio and stable starting and braking. In the working process, this mechanism will not be influenced by bigger wind-power. Make use of the brake to keep crane boom at accurate position. The brake has the function of location but not the function of deceleration braking. However, in non-working state the crane boom can rotate following wind directions.

Quality Control:
Quality is the key to our success. We are committed to achieving customers' satisfaction by offering high quality products and services.
 
We make sure that our comprehensive quality management system is in accordance with ISO9001 standard and is performed effectively.
 
In pursuit of high-quality raw materials, we go through a stringent verification and selection process to choose the best suppliers of forged rings and other components in China. If required, we can also apply extra large-diameter forged rings produced by ThyssenKrupp in Germany.






SYM HOIST & TOWER CRANE QUIPMENT CO.,LTD located in Shenyang China is one of the biggest supplier and export of tower crane, luffing crane , topless crane , passenger hoist along with the spare parts for them. With 20 years' experience on tower crane rent , installation , repair and reconstruction, the company has more than 50 experienced mechanical and electrical engineer responsible for the installation guide, failure diagnosis, maintainance and reconstruction for the tower craneattheconstructionsite.
Having a long-term and good cooperative relationship with China's most famous manufacturer of tower crane and passenger hoist like YONGMAO, SANYO, Sichuan SCM, Zoomlion, GJJ, BAODA,etc. The company can offer you the best quality original tower crane and passenger hoist with most competitive price.

Also, we can provide customers with the best professional services, help customers make the right judgment, also the prompt shipment because of the largest number and most complete tower crane and passenger hoist spare parts inventory.
Our trading partners go all over the world, mainly in South-East Asia (Singapore, Hong Kong, Malaysia, Indonesia, the Philippines, Thailand, South Korea, Vietnam ), Middle East (The United Arab Emirates, Saudi Arabia, Qatar, Bahrain, Kuwait, Iran ), India, Russia, Ukraine, Brazil, etc.