... :A) Machined Type Needle roller bearing NA49, NA59, NA69,NKI, NKIS, BRI, TAFI,NAO, NA...2RS, etcB) Machined Type Needle roller bearing without inner ringRNA49, RNA59, RNA69 ... ,NK, NKS, TAF,RNAO, RNA, HJ,BR,NCS,MR, etcC) Drawn Cup Needle bearingHK, BK ... limit FwD C Cr DynamicCor StaticLubricating oil mmmmNrpm with inner ring 15 ...