... of excavators Slew bearing for Single-row ball(HS Series)1. Id:320-4500 Od:550-4500mm 2.material: 52Mn,42CrMo 3 ... -1 standard7.Basic loading rating:Dynamic & Static depend on different modelThe single-row four points contact ball Slewing Bearing is composed ... HD450), HD700 (HD770), HD820 (HD850), HD1220 (HD1250),SK07-2-7, SK200, LS2800FJ, S340, S430 Excavator slew bearing for Single-row ball(HS Series)