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BEARING INTERNAL CLEARANCE
Radial internal clearance of deep groove ball bearings
Radial internal clearance of deep groove 
Under zero measuring load unit:μm ball bearings based on measure load
Bore Diameter      d                      mm C2 Normal C3 C4 C5 Bore diameter  d                      mm Measuring    Load                  N/kg Radial clearance incease                              um
over incl min max min max min max min max min max over incl C2 C0 C3,C4,C5
2.5 10 0 7 2 13 8 23 14 29 20 37 10 18 24.5/2.5 3-4 4 4
10 18 0 9 3 18 11 25 18 33 25 45 18 50 49/5 4-5 5 6
18 24 0 10 5 20 13 28 20 36 28 48 50 200 147/15 6-8 8 9
　 　 　 　 　 　 　 　 　 　 　 　
24 30 1 11 5 20 13 28 23 41 30 53
30 40 1 11 6 20 15 33 28 46 40 64
40 50 1 11 6 23 18 36 30 51 45 73 Radial internal clearance of
　 　 　 　 　 　 　 　 　 　 　 　 bearings for electric moter
50 65 1 15 8 28 23 43 38 61 55 90 unit:μm
65 80 1 15 10 30 25 51 46 71 65 105 Bore diameter  d                      mm Radial internal clearance CM
80 100 1 18 12 36 30 58 53 84 75 120 Deep groove ball bearing Cyindrical roller bearing
　 　 　 　 　 　 　 　 　 　 　 　
100 120 2 20 15 41 36 66 61 97 90 140 over incl min max min max
120 140 2 23 18 48 41 81 71 114 105 160 10 18 4 11 - -
140 160 2 23 18 53 46 91 81 130 120 180 18 24 5 12 - -
　 　 　 　 　 　 　 　 　 　 　 　 24 30 5 12 15 30
160 180 2 25 20 61 53 102 91 147 135 200 30 40 9 13 15 30
180 200 2 30 25 71 63 117 107 163 150 230 40 50 9 17 20 35
200 225 4 32 28 82 73 132 120 187 175 255 50 65 12 22 25 40
Radial internal clearance of self-aligning ball bearings 65 80 12 22 30 45
unit:μm 80 100 18 30 35 55
Bore diameter  d                     mm C2 Normal C3 C4 100 120 18 30 35 60
Radial internal clearance of
over incl min max min max min max min max magneto ball bearing unit:μm
Bearings with cylindrical bore Bore diameter  dmm C2 Normal
2.5 6 1 8 5 15 10 20 15 25
6 10 2 9 6 17 12 25 19 33 over incl min max min max
10 14 2 10 6 19 13 26 21 35 2.5 10 10 40 20 50
　 　 　 　 　 　 　 　 　 　 10 30 20 50 30 60
14 18 3 12 8 21 15 20 23 37
18 24 4 14 10 23 17 30 25 39
24 30 5 16 11 24 19 35 29 46
　 　 　 　 　 　 　 　 　 　
30 40 6 18 13 29 23 40 34 53 Radial internal clearance of
40 50 6 19 14 31 25 44 37 57 miniature ball bearing
50 65 7 21 16 36 30 50 45 69 unit:μm
　 　 　 　 　 　 　 　 　 　 Clearance symbols Radial clearane
65 80 8 24 18 40 35 60 54 83
80 100 9 27 22 48 42 70 64 96 min max
Bearings with tapered bore M1 0 5
18 24 7 17 13 26 20 33 28 42 M2 3 8
24 30 9 20 15 28 23 39 33 50 M3 5 10
30 40 12 24 19 35 29 46 40 59 M4 8 13
　 　 　 　 　 　 　 　 　 　 M5 13 20
45 50 14 29 22 39 33 52 45 65 M6 20 28
50 65 18 32 27 47 41 61 56 80
65 80 23 39 35 57 50 75 69 98
　 　 　 　 　 　 　 　 　 　
80 100 29 47 42 68 62 90 84 116
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