Joint bearing 1)Good model supplier 2)OEM service availability 3)Conform ISO9001 4)High technology & top quality Joint beairngHk ,BK seriesHK ,RSHK ,2RS seriseBK ,RS seriesNA ,RNA ,NK seriesHF,FC seriesHFL,FCB seriesK series ,AS ,G811 ,WS811NATR,NATV,PP seriesNUTR ,NUTR ,X seriesIR ,IR seriesNKIA ,NKIB seriesNeedle bearings are roller bearings with roller that have high length to diameter ratios ...