... all types of excavators Slew bearing for Single-row ball(HS Series)1. Id:320-4500 Od:550-4500mm 2.material ... : 52Mn,42CrMo 3.OME service 4.ISO9001-2000 certificate 5.R&D capacity6.Tolerance:ABEC-1 standard7.Basic loading rating ... for :1) Komatsu: PC60-5/6, PC100, PC200-1-3-5-6, PC220,PC300-3-5, PC400-3-5, PC400-3-5, D20, D30, D50 ... LS2800FJ, S340, S430 Excavator slew bearing for Single-row ball(HS Series)