LYC has begun manufacturing slewing bearings since 1970s. The long history help LYC accumulate rich design and manufacturing experience. LYC is the largest manufacturing base of slewing bearings in China. Slewing bearings used for radar tracking system, high-precision machine tool rotating floor, medical appliance, wind power generators, port machineries, and engineering plant etc. The outside dimension of slewing bearings is up to 6.07m (the biggest at present). The rotating accuracy is up to class p5.