NTN - Large Bearings

Bearing Tolerances
Table 3.3 Tolerance for radial bearings (Except tapered roller bearings)
Table 3.3 (1) Inner rings
Nominal
bore
diameter
d
mm
over
80
120
150
180
250
315
400
500
630
800
1,000
1,250
1,600
incl.
120
150
180
250
315
400
500
630
800
1,000
1,250
1,600
2,000
Single plane mean bore diameter deviation
∆dmp
class 0 class 6 class 5
1
class 4
1
class 2
high low high low high low high low high low
0
0
0
0
0
0
0
0
0
0
0
0
0
-20
-25
-25
-30
-35
-40
-45
-50
-75
-100
-125
-160
-200
0
0
0
0
0
0
0
0
-15
-18
-18
-22
-25
-30
-35
-40
0
0
0
0
0
0
-10
-13
-13
-15
-18
-23
0
0
0
0
-8
-10
-10
-12
0
0
0
0
-5
-7
-7
-8
Single radial plane bore diameter variation
Vdp
diameter series 9 max diameter series 0,1 max diameter series 2,3,4
class class class class class class class class class class class class class class class
0 6 5 4 2 0 6 5 4 2 0 6 5 4 2
max
max
max
1 The dimensional difference ∆ds of bore diameter to applied for class 4 and 2 is the same as the tolerance of dimensional difference ∆dmp of average bore diameter.
However, the dimensional difference is applied to diameter series 0, 1, 2, 3 and 4 against Class 4, and to all the diameter series against Class 2.
25
31
31
38
44
50
56
63
94
125
155
200
250
19
23
23
28
31
38
44
50
10
13
13
15
18
23
8
10
10
12
5
7
7
8
25
31
31
38
44
50
56
63
94
125
155
200
250
19
23
23
28
31
38
44
50
8
10
10
12
14
18
6
8
8
9
5
7
7
8
15
19
19
23
26
30
34
38
55
75
94
120
150
11
14
14
17
19
23
26
30
8
10
10
12
14
18
6
8
8
9
5
7
7
8
Table 3.3 (2) Outer rings
Nominal
outside
diameter
D
mm
over
80
120
150
180
250
315
400
500
630
800
1,000
1,250
1,600
2,000
incl.
120
150
180
250
315
400
500
630
800
1,000
1,250
1,600
2,000
2,500
Single plane mean outside diameter deviation
∆Dmp
class 0 class 6 class 5
4
class 4
4
class 2
high low high low high low high low high low
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-15
-18
-25
-30
-35
-40
-45
-50
-75
-100
-125
-160
-200
-250
0
0
0
0
0
0
0
0
0
0
-13
-15
-18
-20
-25
-28
-33
-38
-45
-60
0
0
0
0
0
0
0
0
0
-10
-11
-13
-15
-18
-20
-23
-28
-35
0
0
0
0
0
0
-8
-9
-10
-11
-13
-15
0
0
0
0
0
0
-5
-5
-7
-8
-8
-10
Single radial plane outside diameter variation
VDp
open type
diameter series 9 max diameter series 0,1 max diameter series 2,3,4
class
0
19
23
31
38
44
50
56
63
94
125
155
200
250
310
class
6
16
19
23
25
31
35
41
48
56
75
class
5
max
10
11
13
15
18
20
23
28
35
class
4
8
9
10
11
13
15
class
2
5
5
7
8
8
10
class
0
19
23
31
38
44
50
56
63
94
125
155
200
250
310
class
6
16
19
23
25
31
35
41
48
56
75
class
5
max
8
8
10
11
14
15
17
21
26
class
4
6
7
8
8 8
10 8
11 10
class
2
5
5
7
class
0
11
14
19
23
26
30
34
38
55
75
94
120
150
190
class
6
10
11
14
15
19
21
25
29
34
45
class
5
max
8
8
10
11
14
15
17
21
26
class
4
6
7
8
8
10
11
class
2
5
5
7
8
8
10
4 The dimensional difference ∆Ds of outer diameter to be applied for classes 4 and 2 is the same as the tolerance of dimensional difference ∆Dmp of average outer
diameter. However, the dimensional difference is applied to diameter series 0, 1, 2, 3 and 4 against Class 4, and also to all the diameter series against Class 2.
A-12