... noise and long life HM88542-HM88512 Cylindrical Roller Bearings Made in China Design Classification :1.Single Row Cylindrical Roller BearingSingle row cylindraical ... installed separately,whjich is favorable for stalling,checking and maintaining.The bearings of NNU-design have a conical bore generally. ... centered.3.EP-nylon cage with rollers centered.1. Typesof structure: NU,N,NJ,NF,NUP,NH,NCL...V,NB,NU ...