Ceramic Bearings - Inch/Metric Conversion Chart

Fraction Inch mm Fraction Inch mm Fraction Inch mm
1/64 0.0156 0.3969   19/64 0.2969 7.5406     0.7087 18.0000
  0.0250 0.5350   5/16 0.3125 7.9375   23/32 0.7187 18.2562
1/32 0.3120 0.7937     0.3150 8.0000   47/64 0.7344 18.6532
  0.0394 1.0000   21/64 0.3281 8.3344     0.7435 18.8849
  0.0400 1.0160   11/32 0.3477 8.7312     0.7480 10.0000
3/64 0.0469 1.1906     0.3543 9.0000   3/4 0.7500 19.0500
  0.0472 1.2000   23/64 0.3594 9.1281   49/64 0.7656 19.4469
  0.0550 1.3970   3/8 0.3750 9.5250     0.7717 19.6012
  0.0591 1.5000   25/64 0.3906 9.9213   25/32 0.7812 19.8433
1/16 0.0625 1.5875     0.3937 10.0000     0.7874 20.0000
  0.0709 1.8000   13/32 0.4062 10.3187   51/64 0.7969 20.2402
5/64 0.0781 1.9844     0.4100 10.4140   13/16 0.8125 20.6375
  0.0787 2.0000   27/64 0.4219 10.7156     0.8268 21.0000
  0.0906 2.3012     0.4250 10.7950   53/64 0.8281 21.0304
3/32 0.0937 2.3812     0.4331 11.0000   27/32 0.8437 21.4312
  0.0984 2.5000   7/16 0.4375 11.1125   55/64 0.8594 21.8281
  0.1000 2.5400   29/64 0.4531 11.50.94     0.8661 22.0000
  0.1024 2.6000     0.4600 11.6840   7/8 0.8750 22.2250
7/64 0.1094 2.7781   15/32 0.4687 11.9062   57/84 0.8906 22.6219
  0.1100 2.7940     0.4724 12.0000     0.9055 23.0000
  0.1102 2.8000   31/64 0.4844 12.4031   29/32 0.9062 23.0167
  0.1181 3.0000   1/2 0.5000 12.7000   59/64 0.9219 23.4156
1/8 0.1250 3.1750     0.5118 13.0000   15/16 0.9219 23.5156
  0.1256 3.1902   33/64 0.5156 13.0968     0.9449 24.0000
  0.1378 3.5000   17/32 0.5312 13.4937   61/64 0.9531 24.2094
9/64 0.1406 3.5719   35/64 0.5469 13.8906   31/32 0.9687 24.6062
5/32 0.1562 3.9687     0.5512 14.0000     0.9843 25.0000
  0.1575 4.0000   9/16 0.5625 14.2875   63/64 0.9844 25.0031
11/64 0.1719 4.3656   37/64 0.5781 14.6844   1 1.0000 25.4000
3/16 0.1875 4.7625     0.5906 15.0000     1.0236 26.0000
  0.1862 4.8057   19/32 0.5937 15.0812     1.0415 26.4541
  0.1969 5.0000   39/64 0.6094 15.4781     1.0480 26.6192
13/64 0.2031 5.1594   5/8 0.6250 15.8750   1-1/16 1.0625 26.9875
  0.2165 5.4991     0.6299 16.0000     1.0630 27.0000
7/32 0.2187 5.5562   41/64 0.6406 16.2719     1.1025 28.0000
15/64 0.2344 5.9531     0.6500 16.5100   1-1/8 1.1250 28.5750
  0.2362 6.0000   21/32 0.6562 16.6687     1.1417 29.0000
1/4 0.2500 6.3500     0.6620 16.8148     1.1812 30.0000
17/64 0.2656 6.7469     0.6693 17.0000   1-3/16 1.1875 30.1525
  0.2756 7.0000   43/64 0.6719 17.0656   1-1/4 1.2500 31.7500
9/32 0.2812 7.1437   11/16 0.6875 17.4625   1-3/8 1.3750 34.9250
  0.2883 7.3228   45/54 0.7031 17.8594   1-1/2 1.5000 38.1000


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