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          Bearing Fits

          What shaft fit do my bearings require?

            • SHAFT FIT varies by bearing type and by specific application. The tolerances indicated below are general guidelines, and assume the following: solid rotating shaft, stationary housing, normal load conditions. For more specific info, feel free to contact our sales personnel.

          SHAFT FITS

          METRIC BALL BEARINGS CYLINDRICAL ROLLER BEARINGS
          inner diameter low high inner diameter low high
          4-6mm +0.001mm +0.006mm up to 30mm +0.002mm +0.011mm
          7-10mm +0.001mm +0.007mm 35-50mm +0.002mm +0.013mm
          12-17mm +0.001mm +0.009mm 45-50mm +0.009mm +0.020mm
          20-30mm +0.002mm +0.011mm 55-80mm +0.011mm +0.024mm
          35-50mm +0.002mm +0.013mm 85-100mm +0.013mm +0.028mm
          55-80mm +0.002mm +0.015mm 105-120mm +0.013mm +0.035mm
          85-120mm +0.003mm +0.018mm 125-140mm +0.015mm +0.040mm
          125-140mm +0.015mm +0.033mm 145-180mm +0.027mm +0.052mm
          145-180mm +0.015mm +0.040mm 185-200mm +0.031mm +0.060mm
          185-200mm +0.017mm +0.046mm 205-250mm +0.050mm +0.079mm
          205-250mm +0.031mm +0.060mm 255-315mm +0.056mm +0.088mm
          255-300mm +0.034mm +0.066mm 320-400mm +0.062mm +0.098mm
          INCH BALL BEARINGS SPHERICAL ROLLER BEARINGS
          inner diameter low high inner diameter low high
          1/8” to 3/16” +0.0000″ +0.0002″ up to 30mm +0.002mm +0.011mm
          1/4” to 3/8” +0.0000″ +0.0003″ 35-40mm +0.002mm +0.013mm
          1/2” to 5/8” +0.0000″ +0.0004″ 45-50mm +0.009mm +0.020mm
          3/4” to 1-1/8” +0.0001″ +0.0004″ 55-80mm +0.011mm +0.024mm
          1-1/4” to 1-7/8” +0.0001″ +0.0005″ 85-100mm +0.013mm +0.028mm
          2” to 3” +0.0001″ +0.0006″ 105-120mm +0.023mm +0.045mm
          3-1/4” to 4-1/2” +0.0001″ +0.0007″ 125-140mm +0.027mm +0.052mm
          4-3/4” to 7” +0.0001″ +0.0008″ 145-180mm +0.043mm +0.068mm
          7-1/4” to 9” +0.0002″ +0.0009″ 185-250mm +0.050mm +0.079mm
          255-280mm +0.056mm +0.088mm
          MOUNTED BEARINGS 285-315mm +0.098mm +0.130mm
          inner diameter low high 320-355mm +0.108mm +0.144mm
          1/2” to 1-15/16” -0.0005″ -0.0000″ 360-400mm +0.114mm +0.150mm
          2” to 3-3/16” -0.0010″ -0.0000″ 405-450mm +0.126mm +0.166mm
          3-1/4” to 6” -0.0015″ -0.0000″ 455-500mm +0.132mm +0.172mm
          505-560mm +0.150mm +0.220mm
          565-630mm +0.155mm +0.225mm
          635-710mm +0.175mm +0.255mm
          715-800mm +0.185mm +0.265mm
          805-900mm +0.210mm +0.300mm
          905-1000mm +0.220mm +0.310mm

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