>> P.291
HdaarFdShaft dia. 7.938-15.875mmIRBInner Rings for Shell Type Needle Roller BearingsInch SeriesBYB 98YB 108YBH 108YB 912YB 1012YB 108YBH 108YB 1012────YB 1112YB 128YB 1210YB 1212──BHA 1012Z─BHA 1016Z─BHA 118ZBHA 1112Z──BHA 1212Z──H10BHA 138ZBHA 1310ZBHA 1312ZYB 138YBH 1310YBH 1312────YB 148YB 1412─────BHA 1412ZBA 98ZBA 108ZBHA 98ZBHA 108ZBA 912ZBA 1012Z─BHA 1012ZBA 108ZBHA 108Z 9.525( 3╱ 8) 9.525( 3╱ 8)14.288( 9╱16)15.875( 5╱ 8)13.0813.0812.812.813.214 9.525( 3╱ 8) 9.525( 3╱ 8)11.112( 7╱16)14.288( 9╱16)15.875( 5╱ 8)15.875( 5╱ 8)19.4319.4313.0812.812.813.21414.414.811.112( 7╱16)11.112( 7╱16)11.112( 7╱16)15.875( 5╱ 8)15.875( 5╱ 8)15.875( 5╱ 8)12.700( 1╱ 2)12.700( 1╱ 2)12.700( 1╱ 2)12.700( 1╱ 2)12.700( 1╱ 2)12.700( 1╱ 2)12.700( 1╱ 2)12.700( 1╱ 2)17.462(11╱16)17.462(11╱16)17.462(11╱16)19.050( 3╱ 4)19.050( 3╱ 4)19.050( 3╱ 4)19.050( 3╱ 4)19.050( 3╱ 4)14.288( 9╱16)14.288( 9╱16)14.288( 9╱16)14.288( 9╱16)14.288( 9╱16)14.288( 9╱16)20.638(13╱16)20.638(13╱16)20.638(13╱16)20.638(13╱16)20.638(13╱16)20.638(13╱16)19.4322.6025.78 9.9013.0819.4313.0816.2519.4322.6025.7813.0816.2519.4322.6025.7832.1314.414.414.416.916.916.916.916.916.916.916.919191919191915.875( 5╱ 8)15.875( 5╱ 8)15.875( 5╱ 8)22.225( 7╱ 8)22.225( 7╱ 8)22.225( 7╱ 8) 9.90 13.0819.4320.720.720.714.814.814.816.916.916.917.517.517.517.517.519.619.619.619.619.619.621.221.221.20.30.30.30.30.30.30.30.30.30.30.30.60.60.60.60.60.60.60.60.60.60.60.60.60.6BA 1012ZBA 1014ZBA 1016ZBA 116ZBA 118ZBA 1112ZBA 128ZBA 1210ZBA 1212ZBA 1214ZBA 1216ZBA 138ZBA 1310ZBA 1312ZBA 1314ZBA 1316ZBA 1320ZBA 146ZBA 148ZBA 1412ZMass (Ref.)Boundary dimensionsmm(inch)dFBStandard mounting dimensions mmda(1)ras maxMin.Max. Max. Assembled bearingsBA … Z(BAM)BHA … Z(BHAM)YBYBH 7.938( 5╱16)12.700( 1╱ 2)13.0811.311.70.3BA 88ZBHA 88ZYB 88Identification numberShaft dia.mm(inch) 7.938(5╱16)IRB 58 9.525(3╱8)11.112(7╱16)12.700(1╱2)14.288(9╱16)15.875(5╱8)IRB 68IRB 68-1IRB 612IRB 612-1IRB 78IRB 712IRB 714IRB 716IRB 86IRB 88IRB 812IRB 88-1IRB 810-1IRB 812-1IRB 814-1IRB 816-1IRB 98IRB 910IRB 912IRB 914IRB 916IRB 920IRB 106IRB 108IRB 1012g8 8.912.613.218.810.11517.419.9 8.511.216.715.819.623.527.53117.321.5263034.54314.518.928Note(1) Maximum allowable llet corner radius of shaft RemarkNo oil hole is provided.
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