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HTable 5 Tolerances of outside diameter of inner ringunit: μm■FitModel codeToleranceIRTIRBLRT,LRTZLRB,LRBZ … Bg5 0〜-13Based on Table 6Based on Table 7Table 7 Tolerances of outside diameters of LRB and LRBZ … Bunit: μmThe recommended fits between Inner Rings and shafts are shown in Table 22 on page A42. ■Oil Hole The number of oil holes is shown in Table 8.When Inner Rings with an oil hole are especially required for a model without an oil hole, attach an "OH" to the end of the identification number when Nominal outside diameter of inner ringmmOver-18.03425.90830.22635.05250.038Incl.18.03425.90830.22635.05250.03880.01080.010100.076100.076102.108Toleranceordering.High-13-18-23-23-25-28-32-37Low-23-30-36-38-41-46-56-66Example: LRT 202420 OH For Inner Rings with multiple oil holes, please consult IKO. Table 8 Number of oil holes Bearing typeFor Shell Type Needle Roller BearingsMetric seriesIRTInch seriesIRBLRTLRTZLRBMetric seriesInch seriesFor General UsageLRBZ … BBore diameter of inner ring d mmNumber of oil holes0000121 d≦76.20076.200<dRemark nner rings with an oil hole are provided with an oil groove.FOutside diameter of inner ringmm80< F ≦ 120120< F ≦ 180180< F ≦ 250250< F ≦ 315315< F ≦ 400400< F ≦ 500unit: μmdBore diameter ofinner ring mmHighLowHighLowHighLowHighLowHighLowHighLowOverIncl.243040506580100120140160180200225250280315355400450500H4-243040506580100120140160180200225250280315355400450- 4-14-14-17-27-32- 7-17-27-22-37-52-25-40-55-46-66-86-54-69-87-107-68-83-128-107-127-182-122-172-142-152-202-222
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