Tolerance

Tolerance

Inner Ring
Diamensions in M.M.
Nominal Bore

Diameter

 Over

To

 5

15

 15

20

 20

35

 35

55

 55

75

 75

120
Standard Tolerance in Microns
Bore dm -10

0

 -9

0

 -10

0

 -11

0

 -13

0

 -20

0
Width B 0

-110

 0

-110

 0

-110

 0

-110

 0

-140

 0

-200
Width Variation 20 25 20 18 30 30
Radial runout of

assembled bearings

 Ri 20 15 17 20 30 35
Outer Rings
Dimensions in m.m.
Nominal

outside diameter

 Over

To

 18

30

 30

50

 50

80

 80

120

 120

150

 150

180

 180

250
Standard Tolerances in Microns
Outside

Diameter

 Dm 0

-10

 0

-10

0

-14

 0

-16

 0

-20

 0

-27

 0

-35
Radial Runout of

assembled bearings

 Ra 17 25 27 35 42 50 50
Width tolerance is same for inner and outer ring

Deep Groove Ball Bearing Clearance in Microns

Nominal Bore

d = mm

 Over 2.5 6 10 18 24 30 40 50 65 80 100 120 140 160
To 6 10 18 24 30 40 50 65 80 100 120 140 160 180
Group C2
 min 0 0 0 0 1 1 1 1 1 1 2 2 2 2
max 7 7 9 10 11 11 11 15 15 18 20 23 23 25
Normal Group CN
 min 2 2 3 5 5 6 6 8 10 12 15 18 18 20
max 13 13 18 20 20 20 23 28 30 36 41 48 53 61
Group C3
 min 8 8 11 13 13 15 18 23 25 30 36 41 46 53
max 23 23 25 28 28 33 36 43 51 58 66 81 91 102
Group C4
 min 14 18 20 23 28 30 38 46 53 61 71 81 91
max 29 33 36 41 46 51 61 71 84 97 114 130 147