Cylindrical Roller Bearings - Norfolkbearings.com

Mounting and Fitting Practice
Inner Ring TAP Fit for Stationary Shaft
Basic
Bearing
Number
Bearing Dimensions
Shaft Diameter
Inch/mm
Maximum Minimum Maximum Minimum
Resultant Fit
.0001 Inch/Micrometers
Loose
Tight
04 0.7874 0.7870 0.7874 0.7869 5L 4T
20.000 19.990 20.000 19.987 13L 10T
ABMA
Fit
Class
05 0.9843 0.9839 0.9843 0.9838 5L 4T
25.000 24.990 25.000 24.987 13L 10T
06 1.1811 1.1807 1.1877 1.1806 5L 4T
30.000 29.990 30.000 29.987 13L 10T
07 1.3780 1.3776 1.3780 1.3774 6L 4.5T
35.000 34.988 35.000 34.984 16L 12T
08 1.5748 1.5744 1.5748 1.5742 6L 4.5t
40.000 39.988 40.000 39.984 16L 12t
09 1.7717 1.7713 1.7717 1.7711 6L 4.5T
45.000 44.988 45.000 44.984 16L 12T
10 1.9685 1.9681 1.9685 1.9679 6L 4.5T
50.000 49.988 50.000 49.984 16L 12T
11 2.1654 2.1648 2.1654 2.1647 7L 6T
55.000 54.985 55.000 54.981 19L 15T
12 2.3622 2.3616 2.3622 2.3615 7L 6T h6
60.000 59.985 60.000 59.981 19L 15T
13 2.5591 2.5585 2.5591 2.5584 7L 6T
65.000 64.985 65.000 64.981 19L 15T
14 2.7559 2.7553 2.7559 2.7552 7L 6T
70.000 69.985 70.000 69.981 19L 15T
15 2.9528 2.9522 2.9528 2.9521 7L 6T
75.000 74.985 75.000 74.981 19L 15T
16 3.1496 3.1490 3.1496 3.1489 7L 6T
80.000 79.985 80.000 79.981 19L 15T
17 3.3465 3.3457 3.3465 3.3456 9L 8T
85.000 84.980 85.000 84.978 22L 20T
18 3.5433 3.5425 3.5433 3.5424 9L 8T
90.000 89.980 90.000 89.978 22L 20T
19 3.7402 3.7394 3.7402 3.7393 9L 8T
95.000 94.980 95.000 94.978 22L 20T
20 3.9370 3.9362 3.9370 3.9361 9L 8T
100.000 99.980 100.000 99.978 22L 20T
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