... , long life 4.Prompt delivery,OEM service needle bearing: Needle roller bearings have a high load carrying capacity in addition to ... , K-ZW ,K-K ,K-ZWD series3) Heavy duty needle roller bearings : NK , NKS , RNA49,RNA69,RNA48,NKI,NKIS , NA49,NA48 ... without guidance : RSTO series6) Yoke type track roller with guidance :NATR ,NUTR,MUTR series7) Stud type track roller : KR , KRV ,NUKR serieswe can supply ...