Deep groove ball bearings of 6800...
Deep groove ball bearings of 6900...
Deep groove ball bearings of 6000...
Deep groove ball bearings of 6200...
Deep groove ball bearings of 6300...
Deep groove ball bearings 6700 64...
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Tolerance

The bearing tolerance is classified as Class 2,4,5,6 and 0 accordance with the Chinese national standard GB/T307-94. The table as below makes a comparison between this classification of tolerance with Chinese national standard GB307-84 as well as ISO standard.
Standard
Classification of tolerance
GB307-84
B
C
D
E
G
GBT307-94
2
4
5
6
0
ISO
2
4
5
6
0
ASA
ABEC-9
ABEC-7
ABEC-5
ABEC-3
ABEC-1
SKF
P2
P4
P5
P6
P0
Inner Ring of P0 grade tolerance
D
mm
Dmp
VDP
Vdmp
Kia
Bs
VBs
Diameter series
9
0.1
2,3,4
Over
To
Max.
Min.
Max.
Max.
Max.
Max.
Min.
Max.
2.5
10
0
-8
10
8
6
6
10
0
-120
15
10
18
0
-8
10
8
6
6
10
0
-120
20
18
30
0
-10
13
10
8
8
13
0
-120
20
Out Ring of P0 grade tolerance
D
mm
Dmp
VDP
VDmp
Kea
Cs
VCs
Open bearing
Closed bearing
9
0.1
2,3,4
2,3,4
Over
To
Max.
Min.
Max.
Max.
Max.
Max.
Min.
Max.
6
18
0
-8
10
8
6
10
6
15
The same as bearing's Bs and VBs.
18
30
0
-9
12
9
8
12
7
15
30
50
0
-11
14
11
7
16
8
20
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