Ball and Roller Bearings

!Miniature and Extra Small Bearings2. Standard cage typesPressed cage are standard for these bearings. However,molded resin cage are used for some bearings depending onthe application.3. Dimensional and rotational accuracyThe accuracy of miniature and extra small ball bearingscomplies with JIS standards. Accuracy standards are listedin the Bearings Tolerances clause on page A-35. Flangeaccuracies are listed in Table 3.Table 3 Tolerance and tolerance values for outer ring flangeUnitsmAccuracy classOuter diameterdimensionaltoleranceOuter ringsurface runoutfor rear surfaceBack faceaxial runoutWidth dimensiontoleranceWidthunevenness!D1S or !D2SUpperLowerSD1Max.Sea1Max.!C1S or !C2SUpper LowerVC1S or VC2SMax.ISO standardClass 0Class 6Class 5Class 4Class 2(see table below)841.51173 14Identical to samebearing's innerring VBSIdentical to samebearing's inner ringVBS52.51.51 Nominal outer diameter, 18 mm or less.UnitsmFlange nominalouter diameterD1 or D2mmover incl.Outer diameterdimensional toleranceUpper!D1S or !D2SLower1022036101827043183033052305039062B-32