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  • Name:Bearing tolerances
  • Type:B009
The tolerance for the boundary dimensions and running accuracy of E&B deep groove ball bearing is divided into five grades according GB/T307.1. It's equivalent to relevant grades of IS0492, DIN620, JISB1514 and ANSI/AFBMASTD20. Their comparison is shown as table 3.1. The tolerance values of these tolerance grades detailed in table 3.2, table 3.3.

Table 3.1 Standard tolerance grades comparison
Standard No. Tolerance grades
GB/T 307.1 0 6 5 4 2
JISB1514 0 6 5 4 2
ISO492 0 6 5 4 2
DIN620 P0 P6 P5 P4 P2
ANSI/AFBMA
STD20		 ABEC-1 ABEC-3 ABEC-5 ABEC-7 ABEC-9

table 3.2 Tolerance for inner ring (units)μm
Tolerance grades d
mm		 dmp dsa Vdsp Vdmp Kia Sd Sia BV ? VBS
open
Diameter series
GB/T307.1 over incl high low high low 9 0.1 2,3,4 Max. high low Max.
Max.
0 2.5
10
18
30		 10
18
30
50		 0
0
0
0		 -8
-8
-10
-12		 ? ? 10
10
13
15		 8
8
10
12		 6
6
8
9		 6
6
8
9		 10
10
13
15		 ? ? 0
0
0
0		 -120
-120
-120
-120		 15
20
20
20
6 2.5
10
18
30		 10
18
30
50		 0
0
0
0		 -7
-7
-8
-10		 ? ? 9
9
10
13		 7
7
8
10		 5
5
6
8		 5
5
6
8		 6
7
8
10		 ? ? 0
0
0
0		 -120
-120
-120
-120		 15
20
20
20
5 2.5
10
18
30		 10
18
30
50		 0
0
0
0		 -5
-5
-6
-8		 ? ? 5
5
6
8		 4
4
5
6		 4
4
5
6		 3
3
3
4

4
4
4
5

 7
7
8
8		 7
7
8
8		 0
0
0
0		 -40
-80
-120
-120

5
5
5
5
4 2.5
10
18
30		 10
18
30
50		 0
0
0
0		 -4
-4
-5
-6		 0
0
0
0		 -4
-4
-5
-6		 4
4
5
6		 3
3
4
4		 3
3
4
4		 2
2
2.5
3		 2.5
2.5
3
4		 3
3
4
4		 3
3
4
4		 0
0
0
0		 -40
-80
-120
-120		 2.5
2.5
2.5
3
2 2.5
10
18
30		 10
18
30
50		 0
0
0
0		 -2.5
-2.5
-2.5
-2.5		 0
0
0
0		 -2.5
-2.5
-2.5
-2.5		 ? 2.5
2.5
2.5
2.5		 2.5
2.5
2.5
2.5		 1.5
1.5
1.5
1.5		 1.5
1.5
2.5
2.5		 1.5
1.5
1.5
1.5		 1.5
1.5
1.5
1.5		 0
0
0
0		 -40
-80
-120
-120		 1.5
1.5
1.5
1.5
applicable to diameter series 0,1,2,3and 4 in P4,P2 classes only

Table 3.3 Tolerance for outerring (units)μm
Tolerance grades D
mm		 Dmp dsa Vadsp Vdmp Kea SD Sea CS VCS
open closed
Diameter series
B/T307.1 over incl high low high low 9 0.1 2,3,4 0,1,2,3,4 Max. high low Max.
Max.
0 2.5
6
18
30
50		 6
18
30
50
80		 0
0
0
0
0		 -8
-8
-9
-11
-13		 ? ? 10
10
12
14
16		 8
8
9
11
13		 6
6
7
8
10		 10
10
12
16
20		 6
6
7
8
10		 15
15
15
20
25		 ? ? same
with
the
BS
of
innerring
in
a
bearing		 same
with
the
Vbs
of
innerring
in a
bearings
6 2.5
16
18
30
50		 6
18
30
50
80		 0
0
0
0
0		 -7
-7
-8
-9
-11		 ? ? 9
9
10
11
14		 7
7
8
9
11		 5
5
6
7
8		 9
9
10
13
16		 5
5
6
7
8		 8
8
9
10
13		 ? ?
5 2.5
6
18
30
50		 6
18
30
50
80		 0
0
0
0
0		 -5
-5
-6
-7
-9		 ? ? 5
5
6
7
9		 4
4
5
5
7		 4
4
5
5
7		 ? 3
3
3
4
5

5
5
6
7
8

 8
8
8
8
8		 8
8
8
8
10

5
5
5
5
6
4 2.5
6
18
30
50		 6
18
30
50
80		 0
0
0
0
0		 -4
-4
-5
-6
-7		 0
0
0
0
0		 -4
-4
-5
-6
-7		 4
4
5
6
7		 3
3
4
5
5		 3
3
4
5
5		 ? 2
2
2.5
3
3.5		 3
3
4
5
5		 4
4
4
4
4		 5
5
5
5
5		 2.5
2.5
2.5
2.5
3
2 2.5
6
18
30
50		 6
18
30
50
80		 0
0
0
0
0		 -2.5
-2.5
-4
-4
-4		 0
0
0
0
0		 -2.5
-2.5
-4
-4
-4		 ? 2.5
2.5
4
4
4		 2.5
2.5
4
4
4		 2.5
2.5
4
4
4		 1.5
1.5
2
2
2		 1.5
1.5
2.5
2.5
4		 1.5
1.5
1.5
1.5
1.5		 1.5
1.5
2.5
2.5
4		 1.5
1.5
1.5
1.5
1.5
applicable to diameter series 0,1,2,3and 4 in P4,P2 classes only

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