DINTECHNICAL INFORMATION

Tolerances

The tolerances of the boundary dimensions and rotational accuracy are defined in accordance with international standards:

● DIN 620 and ISO 492 for metric bearings series 60XX and self-aligning bearings 12XX/13XX/22XX.

● AFBMA for inch bearings series R.

● BS292 for inch bearings series KLNJ and RLS.

WIB ball bearings are manufactured according to the tolerance class DIN P0, P6 and P5 specifications. The accuracy class of the balls is grade 5.

The following table shows the relationship between the various standards, in increasing order of accuracy.

ISO

DIN

ISO

AFBMA

PO

Class 0

ABEC 1

P6

Class 6

ABEC 3

P5

Class 5

ABEC 5

Tolerances for inner rings (IR)

Bearings

Bearings

mm

inch

d
Nominal bore diameter

from
to

3
18

.118
.709

Tolerance values

in µ m

in µ inch

∆_dmp
Single plane mean bore diameter deviation

P0
P6
P5

max/min
0/-8
0/-7
0/-5

max/min
0/-3.2
0/-2.8
0/-2.0

V_dp
Bore diameter variation in a single radial plane
Diameter series 7.8.9 (618/28/38-xx, 619)

P0
P6
P5

10
9
5

4.0
3.5
2.0

V_dp
Diameter series 0.1 (60,630,160-xx)

P0
P6
P5

8
7
4

3.2
2.8
1.6

V_dp
Diameter series 2.3.4 (62x,620x,63x)

P0
P6
P5

6
5
4

2.4
2.0
1.6

V_dmp max
Mean bore diameter variation (for basically cylindrical bores)

P0
P6
P5

6
5
3

2.4
2.0
1.2

d
Nominal bearing bore diameter

from
to

3
10

> 10
18

.118
.394

>.394
.709

∆_Bs
Deviation of a single IR width

P0
P6
P5

max/min
0/-120
0/-120
0/-40

max/min
0/-120
0/-120
0/-80

max/min
0/-47
0/-47
0/-16

max/min
0/-47
0/-47
0/-32

V_Bs max
IR width variation

P0
P6
P5

15
15
5

20
20
5

6
6
2

8
8
2

K_ia max
Radial runout of assembled bearing IR

P0
P6
P5

10
6
4

10
7
4

4.0
2.4
1.6

4.0
2.8
1.6

S_d max
IR reference face runout with bore

P0
P6
P5

-
-
7

-
-
7

-
-
2.8

-
-
2.8

S_ia max
Assembled bearing IR reference face runout with raceway

P0
P6
P5

-
-
7

-
-
7

-
-
2.8

-
-
2.8

The tolerance and rotational accuracy symbols according to the ISO 1132 standard are shown in the following table.

V_Dmp max

∆_Cs

V_Cs max

K_ea max

S_D max

S_ea max

Tolerances for outer rings (OR)

Bearings

Bearings

mm

inch

D
Nominal outside diameter

from
to

6
18

>18
30

>30
50

.236
.709

>.709
1.181

>1.181
1.969

Tolerance Values

in µ m

in µ inch

∆_Dmp
Single radial plane mean outside diameter deviation

P0
P6
P5

max/min
0/-8
0/-7
0/-5

max/min
0/-9
0/-8
0/-6

max/min
0/-11
0/-9
0/-7

max/min
0/-3.2
0/-2.8
0/-2.0

max/min
0/-3.5
0/-3.2
0/-2.4

max/min
0/-4.3
0/-3.5
0/-2.8

V_Dp
Outside diameter variation in a single radial plane
Diameter series 7.8.9 (618/28/38-xx, 619)

P0
P6
P5

10
9
5

12
10
6

14
11
7

4.0
3.5
2.0

4.7
4.0
2.4

5.5
4.3
2.8

V_Dp
Diameter series 0.1 (60,630,160-xx)

P0
P6
P5

8
7
4

9
8
5

11
9
5

3.2
2.8
1.6

3.5
3.2
2.0

4.3
3.5
2.0

V_Dp
Diameter series 2.3.4 (62x,620x,63x)

P0
P6
P5

6
5
4

7
6
5

8
7
5

2.4
2.0
1.6

2.8
2.4
2.0

3.2
2.8
2.0

V_Dp

2Z bearing
Diameter series 0.1.2.3.4

P0
P6
P5

10
9
-

12
10
-

16
13
-

4.0
3.5
-

4.7
4.0
-

6.3
5.1
-

V_Dmp max
Mean outside diameter variation

P0
P6
P5

6
5
3

7
6
3

8
7
4

2.4
2.0
1.2

2.8
2.4
1.2

3.2
2.8
1.6

∆_Cs
Deviation of a single OR width

P0
P6
P5

The width tolerances ∆_Cs are identical to those of ∆_Bs for the corresponding inner ring (IR)

V_Cs max
OR width variation

P0
P6
P5

The width tolerances V_Cs are identical to those of V_Bs for the corresponding inner ring (IR)

5

5

5

2

2

2

K_ea max
Radial runout of assembled bearing OR

P0
P6
P5

15
8
5

15
9
6

20
10
7

6.0
3.2
2.0

6.0
3.5
2.4

8.0
4.0
2.8

S_D max
Variation of outside surface generatrix inclination with OR reference face

P0
P6
P5

-
-
8

-
-
8

-
-
8

-
-
3.2

-
-
3.2

-
-
3.2

S_ea max
Assembled bearing OR reference face runout with raceway

P0
P6
P5

-
-
8

-
-
8

-
-
8

-
-
3.2

-
-
3.2

-
-
3.2

  Tolerances (Standard Bearings)

  Dimensions and Geometrical Forms

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