supply of double row deep groove ball bearing ,sk [double row deep groove ball bearing ,skf no.4306 atn9 or similar rdso approved brands for auxiliary machine bearing (including 3 phase locomotives and emus) .this items is restricted for procurement from rdso approved sources only.] , double row deep groove ball bearing ,skf no.4306 atn9 or similar rdso approved brands for auxiliary machine bearing (including 3 phase locomotives and emus) .this items is restricted for proc urement from rdso approved sources only. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted : max 8 lacs ] ]