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Materials and Accuracy
 
The Bearing Steel chemical Composition See Table1.
The Contrast of Bearing Steel No.of each country.See Table2.
The material of Rings,ball,cage of stainless steel bearings see Table3.
The stainless steel chemical composition see Table4.
According to International Standard,the Accuracy of ball Bearing can be divided into five grades:nomal Grande 0.High Grande 6.Accurate grade 5.
Over Accuracy Grade 4.and over the 4th grade 2.
The grade of tolerance is in accordance with the standard of GB/T307.1-94
The contrast of Bearing Accuracy See Tabel 5
 
Table1
Chemical Composition(%)
No.
C
Mn
Si
Cr
S
P
Ni
Cu
HB
<
Gcr15
0.95-1.05
0.20-0.4
0.15-0.35
1.30-1.65
0.020
0.027
0.3
0.25
170-207
 
Table 2
Country
China
ISO
U.S.A
Germany
Japan
 
 
Sweden
Bearing Steel No.
GCr15
683/X VLL1
(AISI)52100
(Din)100Cr6
(Jis)SUJ2
SKF3
 
Table3
Rings material
AISI440C 9Cr18
AISI440B  9Cr18Mo
AISI304 1Cr18Ni9
AISI316 0Cr17Ni12Mo2
Ball material
AIS144C
AIS1420
AIS1316
AISI304
Cage material
AIS304
0.20-0.4
0.15-0.35
1.30-1.65
 
Table4
No.
C%
Cr%
Si%
Mn%
S%
P%
Mo%
Ni%
AISI440C
0.90-1.05
17-19
≤0.8
≤0.7
≤0.03
≤0.035
 
  
AISI440B
075-0.90
17-19
≤0.8
≤0.8
≤0.03
≤0.035
1-1.3
  
AISI304(304L)
0.08(0.03)
18-20
≤1
≤2
≤0.03
≤0.035
 
8-10.5(9-13)
AISI316(316L)
0.75-090
16-18
≤1
≤2
≤0.03
≤0.035
2-3
10-14
 
Table5
Country
Standard
Accuracy Grade
International Standard Organization
GB307.1
0
6
5
4
2
Sweden
ISO
0
6
5
4
2
Germany
SKF
P0
P6
P5
P4
P2
 
Japan
DIN
P0
P6
P5
P4
 
P2
U.S.A
ANSI
 
ABEC1
ABEC3
ABEC5
ABEC7
 
ABEC9
 
Vibration and Noise
Deep Groove Ball Bearing Accelerating Vibration Value(dB).See Table 1
Deep Groove Ball Bearing Accelerating Vibration Value(μm/s).See Table 2
 
Table1 Single Bearing Vibration speed Grade can not be over the follwoing Values
Bore Diameter(mm)
Diameter Series(0)
Diameter Series(2)
Diameter Series(3)
Z
Z1
Z2
Z3
Z
Z1
Z2
Z3
Z4
Z
Z1
Z2
Z3
Z4
3
35
34
32
28
36
35
32
30
-
37
36
33
31
-
4
35
34
32
28
36
35
32
30
-
37
36
33
31
-
5
37
36
34
30
38
37
34
32
-
39
37
35
33
-
6
37
36
34
30
38
37
34
32
-
39
37
35
33
-
7
39
38
35
31
40
38
36
34
-
-
-
-
-
-
8
39
38
35
31
40
38
36
34
-
-
-
-
-
-
9
41
40
36
32
42
40
37
35
-
-
-
-
-
-
10
43
42
38
33
44
42
39
35
30
46
44
40
37
32
12
44
43
39
34
45
43
39
35
30
47
45
40
37
32
15
45
44
40
35
46
44
41
36
31
48
46
42
38
33
17
46
44
40
35
47
45
41
36
31
49
47
42
38
33
20
47
45
41
36
48
46
42
38
33
50
48
43
39
34
25
48
46
42
38
49
47
43
40
36
51
49
44
41
37
30
49
47
43
39
50
48
44
41
37
52
50
45
42
38
35
51
49
45
41
52
50
46
43
39
54
52
47
44
40
40
53
51
46
42
54
52
47
44
40
56
54
49
45
41
45
55
53
48
45
56
54
49
46
43
58
56
51
47
44
50
57
54
50
47
58
55
51
48
45
60
57
53
49
46
 
Table2 Single Bearing Vibration speed Grade Allowed the Limit Values
Bore Diameter(mm)
V
V1
V2
V3
Low Brand
Medium Brand
High Brand
Low Brand
Medium Brand
Hight Brand
Low Brand   
Medium Brand
Hight Brand
Low Brand
Medium Brand
Hight Brand
5
110
72
60
90
60
50
58
36
30
35
21
18
6
110
72
60
90
60
50
58
36
30
35
21
18
7
130
96
80
110
80
65
72
48
40
44
28
24
8
130
96
80
110
80
65
72
48
40
44
28
24
9
130
96
80
110
80
65
72
48
40
44
28
24
10
160
120
100
140
100
85
90
60
50
55
35
30
12
160
120
100
140
100
85
90
60
50
55
35
30
15
210
150
120
180
130
100
110
78
60
65
46
35
17
210
150
120
180
130
100
110
78
60
65
46
35
20
260
190
150
220
160
125
130
100
75
80
60
45
22
260
190
150
220
160
125
130
100
75
80
60
45
25
260
190
150
220
160
125
130
100
75
80
60
45
28
260
190
150
220
160
125
130
100
75
80
60
45
30
300
240
190
250
200
160
150
120
100
90
75
60
 32
 300
 240
190
250
200
160
150
120
100
 90
 75
 60
35
300
240
190
250
250
160
150
120
100
90
75
60
40
360
300
260
300
250
220
180
150
130
110
90
80
   
      

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