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Rolling and plain bearings, accessories
Transparent classification of our bearings for rotary motion.
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Transparent classification of our linear bearings.
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Lubrication is a design element. You can find the right grease or oil here.
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Here you can find fundamental knowledge on the calculation, lubrication and fitting of bearings.
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Here you can find explanations of terms in bearing technology
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From this list, you can use the old designation to find the new uniform designation of INA and FAG.
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This function determines appropriate INA and FAG bearings based on designations from other manufacturers.
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Radial insert ball bearings
Accuracy
 
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Standard tolerances
of radial insert ball bearings

 

The outside diameter of the bearings corresponds to tolerance class PN to DIN 620-2. The inner ring bore has a plus tolerance to facilitate mounting of the bearing.

  
 

Normal tolerances of bearings, see table.

  
   

Tolerances of
radial insert ball bearings

  

Inner ring
 Outer ring
Nominal dimension
d
mm
 Bore1)

 
 μm
 Nominal dimension
D
mm
 Outside diameter2)

 μm
over
 incl.
 min.
 max.
 over
 incl.
 max.
 min.
12
 18
 0
 +18
 30
 50
 0
 –11
18
 24
 0
 +18
 50
 80
 0
 –13
24
 30
 0
 +18
 80
 120
 0
 –15
30
 40
 0
 +18
 120
 150
 0
 –18
40
 50
 0
 +18
 150
 180
 0
 –25
50
 60
 0
 +18
 180
 250
 0
 –30
60
 90
 0
 +25
 - - - -
90
 120
 0
 +30
 - - - -

 
 
______
 1    This corresponds to the arithmetic mean value derived from the largest and smallest diameters (measured using a two-point measuring device).
 
 
 2    In the case of sealed bearings, the largest and smallest values of the outside diameter can deviate from the mean value by approximately 0,03 mm.
 
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Radial internal clearance
of radial insert ball bearings

  

The radial internal clearance is given in the table.

  
 

For most series, the radial clearance is C3 and is thus larger than for normal deep groove ball bearings.

  
 

The larger internal clearance allows better support of angular misalignment and shaft deflection. Overview of all series and the corresponding internal clearance: see link.

  
   

Radial internal clearance

  

Bore
 Radial internal clearance
d
mm
 CN
μm
 C3
μm
 C4
μm
 C5
μm
over
 incl.
 min.
 max.
 min.
 max.
 min.
 max.
 min.
 max.
2,5
 10
 2
 13
 8
 23
 14
 29
 20
 37
10
 18
 3
 18
 11
 25
 18
 33
 25
 45
18
 24
 5
 20
 13
 28
 20
 36
 28
 48
24
 30
 5
 20
 13
 28
 23
 41
 30
 53
30
 40
 6
 20
 15
 33
 28
 46
 40
 64
40
 50
 6
 23
 18
 36
 30
 51
 45
 73
50
 65
 8
 28
 23
 43
 38
 61
 55
 90
65
 80
 10
 30
 25
 51
 46
 71
 65
 105
80
 100
 12
 36
 30
 58
 53
 84
 75
 120
100
 120
 15
 41
 36
 66
 61
 97
 90
 140
120
 140
 18
 48
 41
 81
 71
 114
 105
 160
140
 160
 18
 53
 46
 91
 81
 130
 120
 180

 
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