Deep groove ball bearing
Angular contact ball bearing
Self aligning bearing
Tepered roller bearing
Cylindrical roller bearing
Needle roller bearing
Spherical roller bearings
Thrust ball bearings
insert bearing and unit
Linear bearing
Spherical Bearing
Wheel bearings
Bearing Material
High carbon chromium bearing steel is the best material for bearing. It features high hardness, strong rolling fatigue resistance, abrasion resistance and stable sizes.
Chemical compositions of GCr15 (SAE52100) are shown on following table.
Chemical Composition %
C
0.95~1.05
Cr
1.40~1.65
Si
0.15~0.35
Mn
0.25~0.45
P
0.027
S
0.02
Chemical Composition %
Ni
0.23
Cu
0.25
Mo
0.1
Sn
0.03
As
0.04
Ti
0.005
Chemical Composition %
Sb
0.002
Pb
0.002
O
0.001
Ai
0.05
Ca
0.01
 
Stainless steel bearing parts material table:

Part Name
INNER RING
OUTER RING
BALL
CAGE
SHIELD
SEAL
Material No
AISI440B
(9Cr18Mo)
AISI440B
(9Cr18Mo)
AISI440B
(9Cr18Mo)
AISI304
AISI304(302)
NBR
AISI440C
(9Cr18)
AISI440C
(9Cr18)
AISI440C
(9Cr18)
AISI304
AISI304(302)
NBR
The Chemical Composition of different stainless steel number.

Stainless steel No
C%
Cr%
Si%
Mn%
S%
P%
Mo%
Ni%
AISI440B
0.90~1.00
17~19
0.8
0.8
0.3
0.035
 
 
AISI440C
0.95~1.10
16~18
0.8
0.8
0.3
0.035
0.4~0.7
 
AISI304
0.07
17~19
1
2
0.3
0.035
 
8~11
Tolerance
Bearing tolerance refers to the size accuracy and running accuracy. The different international standard accuracy as below:

Standard code
Precision class
CHINA GB
0
6
5
4
2
ISO
0
6
5
4
2
ANSI
ABEC-1
ABEC-3
ABEC-5
ABEC-7
ABEC-9
SKF
P0
P6
P5
P4
P2
DIN
P0
P6
P5
P4
P2
JIS
0
6
5
4
2

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