雙排異徑球式回轉(zhuǎn)支承（02系列）
雙排球式回轉(zhuǎn)支承有三個(gè)座圈，鋼球和隔離塊可直接排入上下滾道，根據(jù)受力狀況，安排了上下兩排直徑不同的鋼球。這種形式裝配非常方便，上下圓弧滾道路的承載角都為90度。能承受很大的軸向力和傾翻力矩。當(dāng)徑向力大于0.1倍的軸向力時(shí)，滾道路須特殊設(shè)計(jì)，結(jié)構(gòu)堅(jiān)固。特別適用于要求中等以上直徑的塔式起重機(jī)，汽車起重機(jī)等裝卸機(jī)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.