... ,RN222RS, NATR NARTPP, NATV NATVPP,NUTR NAST. Supporting Roller. The curve roller is composed of a bolt, thrust collar, outer ring ... with camber outside face, withstanding the high radial force.The curve rollers made by our company include KR, KRE, KRV, KRVE ... KRPP,KREPP, KRVPP, KRVEPP, NUKRPP cure roller Supporting roller and curve roller needle bearing