Normal tolerances for radial bearings, except tapered roller

Normal tolerances for radial bearings, except tapered roller bearings -- Inner ring

d tΔdmp1) tVdsp1) tVdmp tΔBs tVBs tKia
    Diameter series   All Normal Modified3)    
> U L 7, 8, 92) 0, 1    2, 3, 4   U L L    
mm μm μm μm μm μm μm
2,5 0 –8 10 8 6 6 0 –40 12 10
2,5 10 0 –8 10 8 6 6 0 –120 –250 15 10
10 18 0 –8 10 8 6 6 0 –120 –250 20 10
                         
18 30 0 –10 13 10 8 8 0 –120 –250 20 13
30 50 0 –12 15 12 9 9 0 –120 –250 20 15
50 80 0 –15 19 19 11 11 0 –150 –380 25 20
                         
80 120 0 –20 25 25 15 15 0 –200 –380 25 25
120 180 0 –25 31 31 19 19 0 –250 –500 30 30
180 250 0 –30 38 38 23 23 0 –300 –500 30 40
                         
250 315 0 –35 44 44 26 26 0 –350 –500 35 50
315 400 0 –40 50 50 30 30 0 –400 –630 40 60
400 500 0 –45 56 56 34 34 0 –450 50 65
                         
500 630 0 –50 63 63 38 38 0 –500 60 70
630 800 0 –75 0 –750 70 80
800 1 000 0 –100 0 –1 000 80 90
                         
1 000 1 250 0 –125 0 –1 250 100 100
1 250 1 600 0 –160 0 –1 600 120 120
1 600 2 000 0 –200 0 –2 000 140 140

Normal tolerances for radial bearings, except tapered roller bearings -- Outer ring

D tΔDmp tVDsp4) tVDmp4) tΔCs tKea
    Open bearings 
Diameter series
Capped bearings5)   tVCs  
> U L 7, 8, 92) 0, 1 2, 3, 4 2, 3, 4      
mm μm μm μm μm μm
                     
2,5 18 0 –8 10 8 6 10 6 Identical to 
tΔBs and tVBs
of an inner ring 
of the same 
bearing as the 
outer ring
15
18 30 0 –9 12 9 7 12 7 15
30 50 0 –11 14 11 8 16 8 20
 
50 80 0 –13 16 13 10 20 10 25
80 120 0 –15 19 19 11 26 11 35
120 150 0 –18 23 23 14 30 14 40
 
150 180 0 –25 31 31 19 38 19 45
180 250 0 –30 38 38 23 23 50
250 315 0 –35 44 44 26 26 60
 
315 400 0 –40 50 50 30 30 70
400 500 0 –45 56 56 34 34 80
500 630 0 –50 63 63 38 38 100
 
630 800 0 –75 94 94 55 55 120
800 1 000 0 –100 125 125 75 75 140
1 000 1 250 0 –125 160
 
1 250 1 600 0 –160 190
1 600 2 000 0 –200 220
2 000 2 500 0 –250 250
  1. 1) Tolerances for tapered bores
  2. 2) Diameter series 7 and 8 not covered by ISO 492:2014.
  3. 3) Applies to inner rings and outer rings of bearings of matched bearing sets consisting of two or more bearings. Does not apply to universally matchable angular contact ball bearings.
  4. 4) Applies to bearings prior to mounting and after removal of internal or external snap ring.
  5. 5) Capped bearings are sealed or shielded bearings.

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