NTN - Precision Rolling Bearings

NTN Main Spindle Bearings
5 Accuracy of cylindrical roller bearings
Table 10.2 Inner rings
Variation of bore diameter
Nominal bore Deviation of mean bore diameter
Class 5 Class 4 1 Class 2 1 Class 5 Class 4 Class 2 Class 5 Class 4 Class 2
diameter
d
in a single plane
Δdmp
in a single plane
Vdsp
Diameter series 9 Diameter series 0
over incl. high low high low high low
max
max
18
30
50
80
120
150
180
250
315
400
30
50
80
120
150
180
250
315
400
500
0
0
0
0
0
0
0
0
0
6
8
9
10
13
13
15
18
23
0
0
0
0
0
0
0
5
6
7
8
10
10
12
0
0
0
0
0
0
0
2.5
2.5
4
5
7
7
8
6
8
9
10
13
13
15
18
23
5
6
7
8
10
10
12
2.5
2.5
4
5
7
7
8
5
6
7
8
10
10
12
14
18
4
5
5
6
8
8
9
2.5
2.5
4
5
7
7
8
Variation of mean
bore diameter
Vdmp
Class 5 Class 4 Class 2
max
3
4
5
5
7
7
8
9
12
2.5
3
3.5
4
5
5
6
1.5
1.5
2
2.5
3.5
3.5
4
Inner ring
radial runout
Kia
Class 5 Class 4 Class 2
max
1 The tolerance of bore diameter deviation Δds applicable to classes 4 and 2 is the same as the tolerance of single plane mean bore diameter deviation Δdmp.
4
5
5
6
8
8
10
13
15
3
4
4
5
6
6
8
2.5
2.5
2.5
2.5
2.5
5
5
Table 10.3 Outer rings
Nominal bore
diameter
D
30
50
80
120
150
180
250
315
400
500
630
50
80
120
150
180
250
315
400
500
630
800
Deviation of mean outside diameter
in a single plane
ΔDmp
Diameter series 9
Class 5 Class 4 2 Class 2 2
over incl. high low high low high low
0
0
0
0
0
0
0
0
0
0
0
7
9
10
11
13
15
18
20
23
28
35
0
0
0
0
0
0
0
0
6
7
8
9
10
11
13
15
0
0
0
0
0
0
0
0
4
4
5
5
7
8
8
10
Variation of outside diameter
in a single plane
VDsp
Diameter series 0
Class 5 Class 4 Class 2 Class 5 Class 4 Class 2
max
max
7
9
10
11
13
15
18
20
23
28
35
6
7
8
9
10
11
13
15
4
4
5
5
7
8
8
10
5
7
8
8
10
11
14
15
17
21
26
5
5
6
7
8
8
10
11
4
4
5
5
7
8
8
10
Variation of mean
outside diameter
VDmp
Class 5 Class 4 Class 2
max
4
5
5
6
7
8
9
10
12
14
18
3
3.5
4
5
5
6
7
8
2
2
2.5
2.5
3.5
4
4
5
Outer ring
radial runout
Kea
Class 5 Class 4 Class 2
max
7
8
10
11
13
15
18
20
23
25
30
5
5
6
7
8
10
11
13
2.5
4
5
5
5
7
7
8
2 The tolerance of outside diameter deviation ΔDs applicable to classes 4 and 2 is the same as the tolerance of mean single plane outside diameter deviation ΔDmp.
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