NKE Hauptkatalog / General Catalogue 2011

DesignationSystemExamples for bearing parts:R……ring with roller sete.g. RNU314-EOuter ring with roller set of a cylindricalroller bearing NU314-EFig.3.5 shows a schematic representation ofthe structure of base designation of standardbearings.e.g. RNA6912Outer ring with needle roller assembly ofa needle roller bearing NA6912BO…… loose ribe.g. BO-NUP220-ELoose rib of a cylindrical roller bearingNUP220-EAXK… Needle roller and cage thrust assemblye.g. AXK5578GS…… housing washere.g. GS-81111Housing washer of a cylindrical rollerthrust bearing 81111WS…… shaft washere.g. WS-81111Shaft washer of a cylindrical roller thrustbearing 81111Base DesignationsThe base designation describes bearing type,base design and its size.Standard bearings usually have base designationsthat consist of letters and numbers or acombination of both. They indicate:- type and base design (bearing series)- size (bearing bore diameter)Fig. 3.5Bearing SeriesThe symbol of the bearing series containsinformation about the type of bearing and itsassignment to a certain width or diameter seriesor, in the case of thrust bearings, to a certainheight and diameter series.The individual bearing series is identified byletters or numbers, or a combination of both.Bearing TypesThe identifi cation of the bearing type is made bythe fi rst symbols of the base designation.The different bearing types may be distinguishedby letters or numbers or a combination of both.In some cases it has been established to omitthe first numbers of the identification symbol ofthe Bearing type, particularly the fi rst fi gure of thedimension series.The most common bearing series are:214www.nke.at