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| Accuracy
¡¡¡¡The accuracy of bearing is
classified as P2,P4,P5,P6,and
P0 as per the State Standard GB/T307.1-94.These
accuracy classes are compared with the standards of GB307-84(China)and
ISO,and listed as follows:
|
Standard
|
Accuracy class
|
|
GB307-84
|
B
|
C
|
D
|
E
|
G
|
|
GB/T307.1-94
|
P2
|
P4
|
P5
|
P6
|
P0
|
|
ISO
|
2
|
4
|
5
|
6
|
0
|
|
ANSI
|
ABEC9
|
ABEC7
|
ABEC5
|
ABEC3
|
ABEC1
|
|
SKF
|
P2
|
P4
|
P5
|
P6
|
P0
|
¡¡¡¡"NGGB"
bearing is generally P5 class . Its allowable tolerance
is listed as follows.
|
Allowable
Tolerance of Radial Bearing
Inner ring
|
|
Accuracy
class
|
dmm
|
¦¤dmp
|
Vdp
|
Vdmp
|
Kia
|
Sia
|
Sd
|
¦¤Bs
|
¦¤VBs
|
|
Diameter
series
|
|
9
|
0.1
|
2.3.4.
|
|
From
|
To
|
Upper
deviation
|
Lower
deviation
|
max
|
max
|
max
|
max
|
max
|
Upper
deviation
|
Lower
deviation
|
max
|
|
PO
|
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
|
|
30
|
50
|
0
|
-12
|
15
|
12
|
9
|
9
|
15
|
|
|
0
|
-120
|
20
|
|
50
|
80
|
0
|
-15
|
19
|
19
|
11
|
11
|
20
|
|
|
0
|
-150
|
25
|
|
P6
|
2.5
|
10
|
0
|
-7
|
9
|
7
|
5
|
5
|
6
|
|
|
0
|
-120
|
15
|
|
10
|
18
|
0
|
-7
|
9
|
7
|
5
|
5
|
7
|
|
|
0
|
-120
|
20
|
|
18
|
30
|
0
|
-8
|
10
|
8
|
6
|
6
|
8
|
|
|
0
|
-120
|
20
|
|
30
|
50
|
0
|
-10
|
13
|
10
|
8
|
8
|
10
|
|
|
0
|
-120
|
20
|
|
50
|
80
|
0
|
-12
|
15
|
15
|
9
|
9
|
10
|
|
|
0
|
-150
|
25
|
|
P5
|
2.5
|
10
|
0
|
-5
|
5
|
4
|
4
|
3
|
4
|
7
|
7
|
0
|
-40
|
5
|
|
10
|
18
|
0
|
-5
|
5
|
4
|
4
|
3
|
4
|
7
|
7
|
0
|
-80
|
5
|
|
18
|
30
|
0
|
-6
|
6
|
5
|
5
|
3
|
4
|
8
|
8
|
0
|
-120
|
5
|
|
30
|
50
|
0
|
-8
|
8
|
6
|
6
|
4
|
5
|
8
|
8
|
0
|
-120
|
5
|
|
50
|
80
|
0
|
-9
|
9
|
7
|
7
|
5
|
5
|
8
|
8
|
0
|
-150
|
6
|
|
Allowable
Tolerance of Radial Bearing
Outer ring
|
|
Accuracy
class
|
dmm
|
¦¤dmp
|
VDp
|
VDMP
|
Kea
|
Sea
|
SD
|
¦¤Cs
|
VCs
|
|
Open
bearing
|
Capped bearing |
|
9
|
0.1
|
2.3.4.
|
2.3.4
|
|
From
|
To
|
Upper
deviation
|
Lower
deviation
|
max
|
max
|
max
|
max
|
max
|
|
max
|
|
PO
|
6
|
18
|
0
|
-8
|
10
|
8
|
6
|
10
|
6
|
15
|
|
|
Same with ¦¤Bs of innet ring
of the same bearing |
|
Same
with ¦¤Bs of innet ring of the
same bearing
|
|
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
|
15
|
|
|
|
80
|
120
|
0
|
-15
|
19
|
19
|
11
|
26
|
11
|
35
|
|
|
|
P6
|
6
|
18
|
0
|
-7
|
9
|
7
|
5
|
9
|
5
|
8
|
|
|
|
18
|
30
|
0
|
-8
|
10
|
8
|
6
|
10
|
6
|
9
|
|
|
|
30
|
50
|
0
|
-9
|
11
|
9
|
7
|
13
|
7
|
10
|
|
|
|
50
|
80
|
0
|
-11
|
14
|
11
|
8
|
16
|
8
|
13
|
|
|
|
80
|
120
|
0
|
-13
|
16
|
16
|
10
|
20
|
10
|
18
|
|
|
|
P5
|
6
|
18
|
0
|
-5
|
5
|
4
|
4
|
|
3
|
5
|
8
|
8
|
5
|
|
18
|
30
|
0
|
-6
|
6
|
5
|
5
|
|
3
|
6
|
8
|
8
|
5
|
|
30
|
50
|
0
|
-7
|
7
|
5
|
5
|
|
4
|
7
|
8
|
8
|
5
|
|
50
|
80
|
0
|
-9
|
9
|
7
|
7
|
|
5
|
8
|
10
|
8
|
6
|
|
80
|
120
|
0
|
-10
|
10
|
8
|
7
|
|
5
|
10
|
11
|
9
|
8
|
|
|
