>> P.120
■TypesExamples of identication numberNeedle Roller Cages for General Usage are available Example 1in the types shown in Table 1.For applications such as crank shafts where these bearings are difficult to install, it is also possible to make split type bearings.If such bearings are required, please contact IKO.For Needle Roller Cages for Engine Connecting Rods (KT…EG and KTV…EG), see page C17.Table 1 Model of bearingItemSingle row needle Double row needle Model of bearingHigh carbon steel cage typeSynthetic resin cage typerollerKTKT…NrollerKTW-■Identification NumberModel codeDimensionsSupplemental codeKT152010C3Type of bearingRoller set bore diameter(15mm)Roller set outside diameter(20mm)Cage width(10mm)Tolerance of mean value of roller dia. (Refer to Table 2.)Example 2Model codeDimensionsSupplemental codeKT505825NC3The identication number of Needle Roller Cages for Type of bearingGeneral Usage consists of a model code, dimensions and any supplemental codes. The arrangement examples are shown below.C3Roller set bore diameter(50mm)Roller set outside diameter(58mm)Cage width(25mm)Tolerance of mean value of roller dia. (Refer to Table 2.)■AccuracyThe diameter tolerances of needle rollers of Needle Roller Cages for General Usage are classified by classication symbols shown in Table 2. If a classi-cation symbol is not indicated in an identication num-ber, the classication symbol "C3" is applied.When two or more bearings are used in tandem arrangement on the same shaft, it is necessary to select bearings of the same classication symbol to obtain an even load distribution.The tolerance of the cage width Bc is -0.20〜-0.55 mm.Table 2 Diameter tolerances of needle rollersunit: μmClassification symbolC 3B 2B 4B 6B 8B10Tolerance of mean value of needle roller diameter0〜- 30〜- 2-2〜- 4-4〜- 6-6〜- 8-8〜-10
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