... ,KOYO, THK,IKO,ZWZ,HRB,LYC,NMB and so on.2.main product:deep groove ball bearings,shperical roller bearing,cylindrical ... bearing.3.material: stainless steel,bearing steel, carbon steel,high chrome4.precision: P0,P2,P4,P5,P65.tolerance grade:GB/T307.1 ... .the process of our own products:1)assembly 2)windage test 3)cleaning 4)rotary test 5)greasing and gland 6) noise inspection ...