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NA49...2RS Series  
Bearing No.
Boundary dimensions(mm)
Basic load ratings(N)
Limiting speeds(rpm)
Mass(g)
d
Fw(F)
D
C
B
Cr
Cor
Oil
≈
NA4900-2RS
10
14
22
13
14
4560
4660
13000
24.5
NA4901-2RS
12
16
24
13
14
5980
9500
12000
27.5
NA4902-2RS
15
20
28
13
14
5980
9500
10000
37
NA4903-2RS
17
22
30
13
14
6050
10100
9000
40
NA4904-2RS
20
25
37
17
18
14900
17500
7500
80
NA4905-2RS
25
30
42
17
18
16300
21500
6500
89.5
NA4906-2RS
30
35
47
17
18
20050
24900
5500
104
NA4907-2RS
35
42
55
20
21
22500
37000
4800
175
NA4908-2RS
40
48
62
22
23
33050
50900
4200
252
NA4909-2RS
45
52
68
22
23
34800
56800
3900
290
NA4910-2RS
50
58
72
22
23
37800
61500
3500
295
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