Table1 The contrast of Bearing Steel No of each country
| Country |
Japan |
American |
Germany |
French |
China |
| Bearing Steel No. |
(JIS)SUJ2 |
(AISI)52100 |
(DIN)100Cr6 |
(NF)100C6 |
(GB)GCr15 |
| Stainless Steel No. |
(JIS)SUS440C |
(AISI)440C |
(DIN)WNr4535 |
(NF)Z100CD17 |
(GB)9Cr18 |
Table2 Accuracy Grade
| Country |
Standard |
Accuracy Grade |
| Japan |
JIS |
P0 |
P6 |
P5 |
| American |
ANSI |
ABEC1 |
ABEC3 |
ABEC5 |
| Germany |
DIN |
P0 |
P6 |
P5 |
| China |
GB |
0 |
6 |
5 |
Table3 Radial Clearanse
| Bore diameter |
group 2 |
Standard group |
group 3 |
group 4 |
group 5 |
| Over |
Incl |
min |
max |
min |
max |
min |
max |
min |
max |
min |
max |
| 2.5 |
6 |
0 |
7 |
2 |
13 |
8 |
23 |
- |
- |
- |
- |
| 6 |
10 |
0 |
7 |
2 |
13 |
8 |
23 |
14 |
29 |
20 |
37 |
| 10 |
18 |
0 |
9 |
3 |
18 |
11 |
25 |
18 |
33 |
25 |
45 |
| 18 |
24 |
0 |
10 |
5 |
20 |
13 |
28 |
20 |
36 |
28 |
48 |
| 24 |
30 |
1 |
11 |
5 |
20 |
13 |
23 |
23 |
41 |
30 |
53 |
| 30 |
40 |
1 |
11 |
6 |
20 |
15 |
33 |
28 |
46 |
40 |
64 |
| 40 |
50 |
1 |
11 |
6 |
23 |
18 |
36 |
30 |
51 |
45 |
73 |
| 50 |
65 |
1 |
15 |
8 |
28 |
23 |
43 |
38 |
61 |
55 |
90 |
| 65 |
80 |
1 |
15 |
10 |
30 |
25 |
51 |
46 |
71 |
65 |
105 |
|