双排异径球式回转支承（02系列）
双排球式回转支承有三个座圈，钢球和隔离块可直接排入上下滚道，根据受力状况，安排了上下两排直径不同的钢球。这种形式装配非常方便，上下圆弧滚道路的承载角都为90度。能承受很大的轴向力和倾翻力矩。当径向力大于0.1倍的轴向力时，滚道路须特殊设计，结构坚固。特别适用于要求中等以上直径的塔式起重机，汽车起重机等装卸机械上。
TheDouble-RowBallStyleSlewingRinghasthreeseat-rings,SteelBallsandSpacersmaybepoureddirectlyintoupper&netherorbits.Tworowsofupper&netherSteelBallsofdifferentdiameterscanbeassembledaccordingtoUndertakingPowersituation.Thekindofopen-pattern-assemblyisveryconvenience.Theload-anglesofupper&nethercircularorbitare90°,soitisabletoundertakeverylargeAxialForceandTippingMoment.WhenRadialForceis0.1multipleofAxialForce,theorbitneedtoberedesigned.Theaxial&radialsizeofthiskindofSlewingRingallareratherbigandthestructureisfirm,soitisespeciallysuitableforsomeLoading&UnloadingMachinesofover-mediumdiameter,suchas,TowerCrane,Truckcrane,andsoon.