Maanshan Fangyuan Precision Machniery co.,ltd is a private enterprise, which is the largest manufacturer specializing in designing and manufacturing slewing rings in China more than thirty years. It is the unique enterprise on Stock market. The product range is from ø100mm- ø5000mm,including more than 3000 types. The main type includes Single-row ball, Double-row ball, Single-row cross-roller, Tri-roller etc. Slewing Ring is widely used in construction machines, engineering machines, harbor machines, metallurgical machines, light industrial machines, wind generators, medical treatment CT machines etc. The product export to US, Russia, Italy, French, German, Japan, South Asian.The company has achieved GJB9001B-2009 quality management system, ISO9001:2008 quality management system, ISO14001:2004 environment management system and OHSAS18001:1999occupational health and safety management system certification. The National test center has more than 40 detecting and analytical instruments, like Gantry three-dimensional measuring machine, universal materials tester ,shocktestingmachine, Comprehensive function test bench, electromagneticvibrationgeneratorsystem, High and low temperature test rig and direct-readingspectrometer etc. The whole processes quality control from chemical composition of raw materials to processing precision of products has been realized.