| NBL
Bearing ring and Steel Ball are made from ：GCr15 |
| The
Chemicai Composition of bearing ring(Table 1) |
| The
Contrast of Bearing Steel No.among Different CounTries.(Table
1) |
| The
cage is made from H62 brass sheet or 0.8F cold rolling
strap.The plastice,phenol aldehyde cage is alse
available. |
| Table1 |
|
Chemical
Composition(％)
|
| No． |
C |
Mn
|
Si |
Cr |
S |
P |
Ni |
Cu |
HB
|
|
<
|
| GCrl 5 |
0.95-1.05 |
0.20-0.4
|
0.15-0.35
|
1.30-1.65
|
0.020
|
0.027 |
0.3 |
0.25 |
17-207 |
|
|
| Table2 |
|
Country
|
China
|
ISO
|
U．S．A
|
Germany
|
Japan
|
Sweden
|
|
Bearing
SteelNo．
|
GCrl5
|
683／XVⅡ1
|
(AISl)52100
|
(Din)100Cr6
|
(Jis)SUJ2
|
SKF3
|
|
|
| The
contrast Of Bearing Accuracy (Table 3) |
| Table3 |
|
Country
|
Standard
|
Accuracy
Grade
|
|
China
|
GB307.1
|
0
|
6
|
5
|
4
|
2
|
|
International
Standard organization
|
ISO
|
0
|
6
|
5
|
4
|
2
|
|
Sweden
|
SKF
|
PO
|
P6
|
P5
|
P4
|
P2
|
|
Germany
|
DIN
|
PO
|
P6
|
PS
|
P4
|
P2
|
|
Japan
|
JIS
|
PO
|
P6
|
P5
|
P4
|
P2
|
|
U．S．A
|
ANSI
|
ABEC1
|
ABEC3
|
ABEC5 |
ABEC7
|
ABEC9
|
|
| |
| |
