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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