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A-35
●Bearing Tolerances
6.1 Dimensional accuracy and running accuracyBearing “tolerances” or dimensional accuracy and
running accuracy, are regulated by ISO and JIS B 1514standards (rolling bearing tolerances). For dimensionalaccuracy, these standards prescribe the tolerancesnecessary when installing bearings on shafts or inhousings. Running accuracy is defined as the allowablelimits for bearing runout during operation.
Dimensional accuracyDimensional accuracy constitutes the acceptable values
for bore diameter, outer diameter, assembled bearingwidth, and bore diameter uniformity as seen in chamferdimensions, allowable inner ring tapered bore deviationand shape error. Also included are, average bore diametervariation, outer diameter variation, average outer diameterunevenness, as well as raceway width and height variation(for thrust bearings).
Running accuracyRunning accuracy constitutes the acceptable values for
inner and outer ring radial runout and axial runout, innerring side runout, and outer ring outer diameter runout.Allowable rolling bearing tolerances have been
established according to precision classes. Bearingprecision is stipulated as JIS class 6, class 5, class 4, orclass 2, with precision rising from ordinary precisionindicated by class 0.Table 6.1 indicates which standards and precision
classes are applicable to the major bearing types. Table6.2 shows a relative comparison between JIS B 1514precision class standards and other standards. For greaterdetail on allowable limitations and values, refer to Tables6.3 - 6.8. Allowable values for chamfer dimensions areshown in Table 6.9, and allowable limitations and valuesfor radial bearing inner ring tapered bores are shown inTable 6.10.
Table 6.1 Bearing types and applicable tolerance
Table 6.2 Comparison of tolerance classifications of national standards
Bearing type
Deep groove ball bearings
Spherical roller thrust bearings
Thrust ball bearings
Spherical roller bearings
Tapered roller bearings
Cylindrical roller bearigns
Self-aligning ball bearings
Angular contact ball bearings
Needle roller bearings
Applicable standard Tolerance class Tolerance table
metric
Inch
J series
JIS B 1514 (ISO492)
JIS B 1514
ANSI/ABMA Std.19
ANSI/ABMA Std.19.1
JIS B 1514 (ISO199)
class 0
class 0
class 0
class 0
class 0
class 0
class 0,6X
class 4
class K
class 0
class 0
class 6
class 6
class 6
class 6
class 6
class 2
class N
class 6 class 5
class C
class 3
class 5
class 5
class 5
class 5
class 5 class 4
class 4
class 4
class 4
class 4
class 0
class B
class 4
class A
class 00
class 2
class 2
class 2
ー ー ー ー
ー
ー
ー
ー
ー ー ー ー
ー ー ー
Table 6.3
Table 6.4
Table 6.5
Table 6.6
Table 6.7
Table 6.8
Standard Applicable standerd
Japanese industrial standard (JIS)
Tolerance Class Bearing Types
Class 0,6X Class 6 Class 2
International Organization for Standardization (ISO)
Deutsches Institut fur Normung(DIN)
American National Standards Institute (ANSI)
Class 5 Class 4JIS B 1514
ISO 492
ISO 199
ISO 578
ISO 1224
DIN 620
ANSI/ABMA Std.20
ANSI/ABMA Std.19.1
ANSI/ABMA Std.19
Normalclass
Class 6XClass 6
Class 6
Class N
Class 2
NormalClass
Class 4
P0
ABEC-1RBEC-1
Class K
Class 4
Class 5 Class 4 Class 2
Class 5 Class 4
Class 3 Class 0 Class 00
Class 5A Class 4A
Class C Class B Class A
Class 3 Class 0 Class 00
ABEC-3RBEC-3
ABEC-5RBEC-5 ABEC-7 ABEC-9
P6 P5 P4 P2
ー
ー ー ー
ー
All type
Radial bearings
Thrust ball bearings
Tapered roller bearings (Inch series)
Precision instrument bearings
All type
Radial bearings (Except tapered roller bearings)
Tapered roller bearings (Metric series)
Tapered roller bearings (Inch series)
American Bearing Manufacturer's Association (ABMA)
1
1 "ABEC" is applied for ball bearings and "RBEC" for roller bearings. Notes 1: JIS B 1514, ISO 492 and 199, and DIN 620 have the same specification level.
2: The tolerance and allowance of JIS B 1514 are a little different from those of ABMA standards.
6. Bearing Tolerances
●Bearing Tolerances
A-36
Table 6.3 Tolerance of radial bearings (Except tapered roller bearings)Table 6.3 (1) Inner rings
Table 6.3 (2) Outer rings
Nominal bore diameter
d
mm
over incl.
Dimensional tolerance of mean bore diameter within plane
Δdmp
Bore diameter variation
Vdp
1 The dimensional difference Δds of bore diameter to applied for class 4 and 2 is the same as the tolerance of dimentional difference Δdmp 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.
4
1 1
high low high low high low high low high low
class 0 class 6 class 5 class 4 class 2
diameter series 9 class
0class
6class
5class
4class
2
max
diameter series 0.1class
0class
6class
5class
4class
2
max
diameter series 2.3.4class
0class
6class
5class
4class
2
max
0.6 2.5
10
18 30 50
80 120 150
180 250 315
400 500 630
800 1 000 1 250 1 600
2.5 10 18
30 50 80
120 150 180
250 315 400
500 630 800
1 000 1 250 1 600 2 000
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 0 0
ー ー ー
ー ー ー ー
-5 -5 -5
-6 -8 -9
-10 -13 -13
-15 -18 -23
ー ー ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 ー ー
ー ー ー
ー ー ー ー
-4 -4 -4
-5 -6 -7
-8 -10 -10
-12 ー ー
ー ー ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 ー ー
ー ー ー
ー ー ー ー
-2.5 -2.5 -2.5
-2.5 -2.5 -4
-5 -7 -7
-8 ー ー
ー ー ー
ー ー ー ー
-8 -8 -8
-10 -12 -15
-20 -25 -25
-30 -35 -40
-45 -50 -75
-100 -125 -160 -200
-7 -7 -7
-8 -10 -12
-15 -18 -18
-22 -25 -30
-35 -40 ー
ー ー ー ー
10 10 10
13 15 19
25 31 31
38 44 50
56 63 ー
ー ー ー ー
9 9 9
10 13 15
19 23 23
28 31 38
44 50 ー
ー ー ー ー
5 5 5
6 8 9
10 13 13
15 18 23
ー ー ー
ー ー ー ー
4 4 4
5 6 7
8 10 10
12 ー ー
ー ー ー
ー ー ー ー
2.5 2.5 2.5
2.5 2.5 4
5 7 7
8 ー ー
ー ー ー
ー ー ー ー
8 8 8
10 12 19
25 31 31
38 44 50
56 63 ー
ー ー ー ー
7 7 7
8 10 15
19 23 23
28 31 38
44 50 ー
ー ー ー ー
4 4 4
5 6 7
8 10 10
12 14 18
ー ー ー
ー ー ー ー
3 3 3
4 5 5
6 8 8
9 ー ー
ー ー ー
ー ー ー ー
2.5 2.5 2.5
2.5 2.5 4
5 7 7
8 ー ー
ー ー ー
ー ー ー ー
6 6 6
8 9
11
15 19 19
23 26 30
34 38 ー
ー ー ー ー
5 5 5
6 8 9
11 14 14
17 19 23
26 30 ー
ー ー ー ー
4 4 4
5 6 7
8 10 10
12 14 18
ー ー ー
ー ー ー ー
3 3 3
4 5 5
6 8 8
9 ー ー
ー ー ー
ー ー ー ー
2.5 2.5 2.5
2.5 2.5 4
5 7 7
8 ー ー
ー ー ー
ー ー ー ー
Nominal outside diameter
D
mm
over incl.
Dimensional tolerance of mean outside diameter within plane
ΔDmp
Outside diameter variation
VDp
open type
5 The dimensional difference ΔDs of outer diameter to be applied for classes 4 and 2 is the same as the tolerance of dimensional difference ΔDmp 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.
8
5 5
6
high low high low high low high low high low
class 0 class 6 class 5 class 4 class 2
diameter series 9class
0class
6class
5class
4class
2
max
diameter series 0.1class
0class
6class
5class
4class
2
max
diameter series 2.3.4class
0class
6class
5class
4class
2
max
2.5 6 18
30 50 80
120 150 180
250 315 400
500 630 800
1 000 1 250 1 600 2 000
6 18 30
50 80
120
150 180 250
315 400 500
630 800
1 000
1 250 1 600 2 000 2 500
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 0 0
0 0 ー
ー ー ー ー
-5 -5 -6
-7 -9
-10
-11 -13 -15
-18 -20 -23
-28 -35 ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 0 ー
ー ー ー
ー ー ー ー
-4 -4 -5
-6 -7 -8
-9 -10 -11
-13 -15 ー
ー ー ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 0 ー
ー ー ー
ー ー ー ー
-2.5 -2.5 -4
-4 -4 -5
-5 -7 -8
-8 -10 ー
ー ー ー
ー ー ー ー
-8 -8 -9
-11 -13 -15
-18 -25 -30
-35 -40 -45
-50 -75
-100
-125 -160 -200 -250
-7 -7 -8
-9 -11 -13
-15 -18 -20
-25 -28 -33
-38 -45 -60
ー ー ー ー
10 10 12
14 16 19
23 31 38
44 50 56
63 94
125
ー ー ー ー
9 9
10
11 14 16
19 23 25
31 35 41
48 56 75
ー ー ー ー
5 5 6
7 9
10
11 13 15
18 20 23
28 35 ー
ー ー ー ー
4 4 5
6 7 8
9 10 11
13 15 ー
ー ー ー
ー ー ー ー
2.5 2.5 4
4 4 5
5 7 8
8 10 ー
ー ー ー
ー ー ー ー
8 8 9
11 13 19
23 31 38
44 50 56
63 94
125
ー ー ー ー
7 7 8
9 11 16
19 23 25
31 35 41
48 56 75
ー ー ー ー
4 4 5
5 7 8
8 10 11
14 15 17
21 26 ー
ー ー ー ー
3 3 4
5 5 6
7 8 8
10 11 ー
ー ー ー
ー ー ー ー
6 6 7
8 10 11
14 19 23
26 30 34
38 55 75
ー ー ー ー
5 5 6
7 8
10
11 14 15
19 21 25
29 34 45
ー ー ー ー
4 4 5
5 7 8
8 10 11
14 15 17
21 26 ー
ー ー ー ー
3 3 4
5 5 6
7 8 8
10 11 ー
ー ー ー
ー ー ー ー
2.5 2.5 4
4 4 5
5 7 8
8 10 ー
ー ー ー
ー ー ー ー
2.5 2.5 4
4 4 5
5 7 8
8 10 ー
ー ー ー
ー ー ー ー
A-37
●Bearing Tolerances
Mean bore diameter variation
Vdmp
Inner ring radial runout
Kia
Unitμm
Side runout with bore
Sd
Inner ring axial runout
Sia
Inner ring width deviation
ΔBs
Inner ring width variation
VBs
2 Applies to ball bearings such as deep groove ball bearings and angular ball bearings. 3 To be applied for individual raceway rings manufactured for combined bearing use. 4 Nominal bore diameter of bearings of 0.6 mm is included in this dimensional division.
23
class 0
class 6
class 5
class 4
class 2
max
class 0
class 6
class 5
class 5
class 4
class 2
class 4
class 2
max max
class 5
class 4
class 2
max high low high lowhigh low
normal
class 0,6 class 5,4
high low high low
class 0,6 class 5,4class 2
modifiedclass
0class
6class
5class
4class
2
max
6 6 6
8 9
11
15 19 19
23 26 30
34 38 55
75 94
120 150
5 5 5
6 8 9
11 14 14
17 19 23
26 30 ー
ー ー ー ー
3 3 3
3 4 5
5 7 7
8 9
12
ー ー ー
ー ー ー ー
2 2 2
2.5 3 3.5
4 5 5
6 ー ー
ー ー ー
ー ー ー ー
1.5 1.5 1.5
1.5 1.5 2
2.5 3.5 3.5
4 ー ー
ー ー ー
ー ー ー ー
10 10 10
13 15 20
25 30 30
40 50 60
65 70 80
90 100 120 140
5 6 7
8 10 10
13 18 18
20 25 30
35 40 ー
ー ー ー ー
4 4 4
4 5 5
6 8 8
10 13 15
ー ー ー
ー ー ー ー
2.5 2.5 2.5
3 4 4
5 6 6
8 ー ー
ー ー ー
ー ー ー ー
1.5 1.5 1.5
2.5 2.5 2.5
2.5 2.5 5
5 ー ー
ー ー ー
ー ー ー ー
7 7 7
8 8 8
9 10 10
11 13 15
ー ー ー
ー ー ー ー
3 3 3
4 4 5
5 6 6
7 ー ー
ー ー ー
ー ー ー ー
1.5 1.5 1.5
1.5 1.5 1.5
2.5 2.5 4
5 ー ー
ー ー ー
ー ー ー ー
7 7 7
8 8 8
9 10 10
13 15 20
ー ー ー
ー ー ー ー
2.5 2.5 2.5
2.5 3 4
4 5 5
6 ー ー
ー ー ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0 0
-40 -120 -120
-120 -120 -150
-200 -250 -250
-300 -350 -400
-450 -500 ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 0 0
ー ー ー
ー ー ー ー
-40 -40 -80
-120 -120 -150
-200 -250 -250
-300 ー ー
ー ー ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 ー ー
ー ー ー
ー ー ー ー
-40 -40 -80
-120 -120 -150
-200 -250 -250
-300 ー ー
ー ー ー
ー ー ー ー
ー -250 -250
-250 -250 -380
-380 -500 -500
-500 -500 -630
ー ー ー
ー ー ー ー
ー 0 0
0 0 0
0 0 0
0 0 0
ー ー ー
ー ー ー ー
0 0 0
0 0 0
0 0 0
0 0 0
ー ー ー
ー ー ー ー
-250 -250 -250
-250 -250 -250
-380 -380 -380
-500 ー ー
ー ー ー
ー ー ー ー
12 15 20
20 20 25
25 30 30
30 35 40
50 60 70
80 100 120 140
12 15 20
20 20 25
25 30 30
30 35 40
45 50 ー
ー ー ー ー
5 5 5
5 5 6
7 8 8
10 13 15
ー ー ー
ー ー ー ー
1.5 1.5 1.5
1.5 1.5 1.5
2.5 2.5 4
5 ー ー
ー ー ー
ー ー ー ー
1.5 1.5 1.5
2.5 2.5 2.5
2.5 2.5 5
5 ー ー
ー ー ー
ー ー ー ー
3 3 3
4 4 5
5 7 7
8 ー ー
ー ー ー
ー ー ー ー
2,3,4 0,1,2,3,4
101012
162026
3038
99
10
131620
2530
667
81011
141923
263034
385575
556
78
10
111415
192125
293445
333
455
678
91012
1418
222.5
33.54
556
78
1.51.52
222.5
2.53.54
45
Mean bore diameter variation
VDmp
Unit μm
Outer ring radial runout
Kea
2.52.52.5
2.534
557
78
Outside surfaceinclination
SD
class 0,6
555
568
88
10
111315
1820
1.51.51.5
1.51.52.5
2.52.54
57
6 To be applied in case snap rings are not installed on the bearings.7 Applies to ball bearings such as deep groove ball bearings and angular ball bearings.8 Nominal outer diameter of bearings of 2.5 mm is included in this dimensional division.
151515
202535
404550
607080
100120140
160190220250
889
101318
202325
303540
506075
556
78
10
111315
182023
2530
334
556
78
10
1113
1.51.52.5
2.545
557
78
888
889
101011
131315
1820
444
445
557
810
1.51.51.5
1.51.52.5
2.52.54
57
Outside ringaxial runout
Sea
888
81011
131415
182023
2530
555
556
78
10
1013
1.51.52.5
2.545
557
78
Outer ringwidth
deviation
ΔCs
all type
Depends on tolerance of ΔBs in relation to d of same bearing
Depends on tolerance of VBs in relation to d of same bearing
6
7
class 0 class 0 class 6
class 6
class 5
class 4
class 2
max
class 0
class 6
class 5
class 4
class 2
max
class 5
class 4
class 2
max
class 5
class 4
class 2
max
class 5
class 4
class 2
maxmax
Outside diameter variation VDP
Sealed/shield bearings
diameter series
Outer ring widthvariation
VCs
●Bearing Tolerances
A-38
Table 6.4 Tolerance of tapered roller bearings (Metric series)
Table 6.4 (1) Inner rings
Table 6.4 (2) Outer rings
Nominal bore diameter
d
mm
over incl.
10 18 30
50 80
120
180 250 315
400 500 630
800
18 30 50
80 120 180
250 315 400
500 630 800
1,000
Dimensional tolerance of mean bore diameter within plane
Δdmp
0 0 0
0 0 0
0 0 0
― ― ―
―
0 0 0
0 0 0
0 ― ―
― ― ―
―
0 0 0
0 0 0
0 ― ―
― ― ―
―
-5 -6 -8
-9 -10 -13
-15 ― ―
― ― ―
―
-12 -12 -12
-15 -20 -25
-30 -35 -40
― ― ―
―
-7 -8
-10
-12 -15 -18
-22 ― ―
― ― ―
―
1 The dimensional difference Δds of bore diameter to be applied for class 4 is the same as the tolerance of dimensional difference Δdmp of average bore diameter.
Bore diameter variation
Vdp
12 12 12
15 20 25
30 35 40
― ― ―
―
7 8
10
12 15 18
22 ― ―
― ― ―
―
5 6 8
9 11 14
17 ― ―
― ― ―
―
4 5 6
7 8
10
11 ― ―
― ― ―
―
Mean bore diameter variation
Vdmp
9 9 9
11 15 19
23 26 30
― ― ―
―
5 6 8
9 11 14
16 ― ―
― ― ―
―
5 5 5
6 8 9
11 ― ―
― ― ―
―
4 4 5
5 5 7
8 ― ―
― ― ―
―
Inner ring radial runout
Kia
15 18 20
25 30 35
50 60 70
― ― ―
―
7 8
10
10 13 18
20 ― ―
― ― ―
―
5 5 6
7 8
11
13 ― ―
― ― ―
―
3 3 4
4 5 6
8 ― ―
― ― ―
―
Side runout
with bore
Sd
7 8 8
8 9
10
11 ― ―
― ― ―
―
3 4 4
5 5 6
7 ― ―
― ― ―
―
1class 0,6X class 5,6
high low high low high low
class 4class 0,6X
class 6
class 5
class 4
max
class 0,6X
class 6
class 5
class 4
max
class 0,6X
class 6
class 5
class 4
class 5
class 4
max max
Nominal outside diameter
D
mm
over incl.
18 30 50
80 120 150
180 250 315
400 500
30 50 80
120 150 180
250 315 400
500 630
Dimensional tolerance of mean outside diameter within plane
ΔDmp
0 0 0
0 0 0
0 0 0
0 0
0 0 0
0 0 0
0 0 0
― ―
0 0 0
0 0 0
0 0 0
― ―
-6 -7 -9
-10 -11 -13
-15 -18 -20
― ―
-12 -14 -16
-18 -20 -25
-30 -35 -40
-45 -50
-8 -9
-11
-13 -15 -18
-20 -25 -28
― ―
2 Does not apply to bearings with flange. 3 The dimensional difference ΔDs of outside diameter to be applied for class 4 is the same as the tolerance of dimensional difference ΔDmp of average outside diameter.
Outside diameter variation
VDp
12 14 16
18 20 25
30 35 40
45 50
8 9
11
13 15 18
20 25 28
― ―
6 7 8
10 11 14
15 19 22
― ―
5 5 7
8 8
10
11 14 15
― ―
Mean bore diameter variation
VDmp
9 11 12
14 15 19
23 26 30
34 38
6 7 8
10 11 14
15 19 21
― ―
5 5 6
7 8 9
10 13 14
― ―
4 5 5
5 6 7
8 9
10
― ―
Outer ring radial runout
Kea
18 20 25
35 40 45
50 60 70
80 100
9 10 13
18 20 23
25 30 35
― ―
6 7 8
10 11 13
15 18 20
― ―
4 5 5
6 7 8
10 11 13
― ―
Outside surface
inclination
SD
8 8 8
9 10 10
11 13 13
― ―
4 4 4
5 5 5
7 8
10
― ―
2
3class 0,6X class 5,6 class 4
class 0,6X
class 6
class 5
class 4
max
class 0,6X
class 6
class 5
class 4
max
class 0,6X
class 6
class 5
class 4
max
class 5
class 4
maxhigh low high low high low
●Bearing Tolerances
A-39
Table 6.4 (3) Effective width of outer and inner rings with roller
Inner ringaxial runout
Sia
Inner ring width deviation
ΔBs
ΔTs
Combination width deviation of double
row bearings
ΔB1s, ΔC1s
Combination width deviation of 4-row
bearings
ΔB2s, ΔC2s
Unitμm
class 4
max
class 0,6 class 6X class 4,5
high low high low high low
class 0,6 class 6X class 4,5
high low high low high low
class 0,6,5
high low
class 0,6,5
high low
Assembly width deviation of single-row tapered roller bearings
000
000
000
ーーー
ー
000
000
000
ーーー
ー
000
000
0ーー
ーーー
ー
-200-200-240
-300-400-500
-600ー ー
ー ー ー
ー
-120-120-120
-150-200-250
-300-350-400
ーーー
ー
-50-50-50
-50-50-50
-50-50-50
ー ー ー
ー
+200+200+200
+200+200+350
+350+350+400
ー ー ー
ー
0 0 0
0-200-250
-250-250-400
ー ー ー
ー
ー ー
+240
+300+400+500
+600+700+800
+900+1 000+1 500
+1 500
344
457
8ーー
ーーー
ー
+100+100+100
+100+100+150
+150+200+200
ー ー ー
ー
000
000
000
ーーー
ー
+200+200+200
+200+200+350
+350ー ー
ー ー ー
ー
-200-200-200
-200-200-250
-250ー ー
ー ー ー
ー
ー ー -240
-300-400-500
-600-700-800
-900-1 000-1 500
-1 500
ー ー ー
ー +500+600
+750+900
+1 000
+1 200+1 200+1 500
+1 500
ー ー ー
ー -500-600
-750-900
-1 000
-1 200-1 200-1 500
-1 500
Outer ring axialrunout
Sea
Outer ring width deviation
ΔCs
000
000
000
00
-100-100-100
-100-100-100
-100-100-100
-100-100
555
678
101013
Depends on tolerance of ΔBs in relation to d of same bearing
Unitμm
4class 0,6,5,4 class 6Xclass 4
max high low high low
4 Applies to bearing where d is greater than 10 mm but is less than or equal to 400 mm.
Nominal bore diameter
d
mm
over incl.
Effective width deviationof roller and inner ring assemblyof tapered roller bearing
ΔT1s
+100+100+100
+100 +100+150
+150+150+200
101830
5080
120
180250315
Unitμm
183050
80120180
250315400
0 0 0
0 -100 -150
-150 -150 -200
+50+50+50
+50 +50+50
+50+100+100
000
000
000
Tapered roller bearing outerring effective width deviation
ΔT2s
+100+100+100
+100 +100+200
+200+200+200
0 0 0
0-100-100
-100-100-200
+50+50+50
+50 +50+100
+100+100+100
000
000
000
class 0 class 6X
high low high low
class 0 class 6X
high low high low
Master cone sub-unit
Master cup sub-unitT1 T2
φd φd
●Bearing Tolerances
A-40
Table 6.5 Tolerance of tapered roller bearings (Inch series)
Table 6.5 (1) Inner rings
Table 6.5 (2) Outer rings
Table 6.5 (3) Single-row tapered roller bearing assembly width, combination width of 4-row bearings, effective width of inner ring with rollers, effective width of outer ring
Table 6.5 (4) Radial deflection of inner and outer rings
Single bore diameter deviation
Δds
Class 4
+13 +25 +25
+51 +76
+102
+127
0 0 0
0 0 0
0
+13 +25 +25
+51 ― ―
―
0 0 0
0 ― ―
―
+13 +13 +13
+25 +38 +51
+76
0 0 0
0 0 0
0
+13 +13 +13
― ― ―
―
0 0 0
― ― ―
―
+8 +8 ―
― ― ―
―
0 0 ―
― ― ―
―
Class 2
Class 3
Class 0
Class 00
Unitμm
Nominal bore diameter
d
mm (inch)
over incl. high low high low high low high low high low
76.2
266.7
304.8 609.6 914.4
1 219.2
－ ( 3 ) (10.5)
(12 ) (24 ) (36 )
(48 )
( 3 ) (10.5) (12 )
(24 ) (36 ) (48 )
－
76.2 266.7 304.8
609.6 914.4
1 219.2
Nominal outside diameter
D
mm (inch)
Single outside diameter deviation
ΔDs
+25 +25 +51
+76 +102 +127
0 0 0
0 0 0
+25 +25 +51
+76 ― ―
0 0 0
0 ― ―
+13 +13 +25
+38 +51 +76
0 0 0
0 0 0
+13 +13 ―
― ― ―
0 0 ―
― ― ―
+8 ― ―
― ― ―
0 ― ―
― ― ―
Unitμm
over incl.
Class 4
Class 2
Class 3
Class 0
Class 00
high low high low high low high low high low
266.7 304.8
609.6 914.4
1 219.2
266.7 304.8 609.6
914.4 1 219.2
－ (10.5) (12 )
(24 ) (36 ) (48 )
(10.5) (12 ) (24 )
(36 ) (48 ) －
Nominal bore
diameter
d
mm (inch)
Overall width deviation of assembled single row tapered roller bearing
ΔTs
+203 +356 +381
+381 +381
0 -254 -381
-381 -381
+203 +203 +381
+381 ―
0 0
-381
-381 ―
+203 +203 +203
+381 +381
-203 -203 -203
-381 -381
+203 +203 ―
― ―
-203 -203 ―
― ―
Class 4,2,3,0
Nominal outside
diameter
D
mm (inch)
－
508.0 (20)
508.0 (20)
－
Overall width deviation of assembled 4-row
tapered roller bearings
ΔB2s, ΔC2s
over incl. over incl. high low
Class 4
high low
Class 2
high low
Class 3
high low high low
Class 0,00
－ 101.6 ( 4) 304.8 (12)
304.8 (12) 609.6 (24)
101.6 ( 4) 304.8 (12) 609.6 (24)
609.6 (36) －
+1 524 +1 524 +1 524
+1 524 +1 524
-1 524 -1 524 -1 524
-1 524 -1 524
51 51 76
76
38 38 51
―
8 18 51
76
4 ― ―
―
2 ― ―
―
Class 2
Class 0
Unitμm
Nominal outside diameter
D
mm (inch)
Inner ring radial runout Kia
Outer ring radial runout Kea
Class 4
Class 3
max
Class 00
over incl.
― 304.8 (14) 609.6 (24)
914.4 (36)
304.8 (14) 609.6 (24) 914.4 (36)
―
A-41
●Bearing Tolerances
Effective width deviation of roller and inner ring assembly of tapered roller bearing
ΔT1s
+102 +152 ―
― ―
0 -152 ―
― ―
+102 +102 +178
― ―
00
-178
― ―
+102 +102 +102
― ―
-102 -102 -102
― ―
Unitμm
Tapered roller bearing outer ring effective width deviation
ΔT2s
+102 +203 ―
― ―
0 -102 ―
― ―
+102 +102 +203
― ―
00
-203
― ―
+102 +102 +102
― ―
-102 -102 -102
― ―
1 To be applied for nominal bore diameters d of 406.400 mm (16 inch) or less.
1 1 1 1
Class 4
high low
Class 2
high low
Class 3
high low
Class 4
high low
Class 2
high low
Class 3
high low
Master cone sub-unit
Master cup sub-unitT1 T2
φd φd
●Bearing Tolerances
A-42
Table 6.6 Tolerance of tapered roller bearings of J series (Metric series)
Table 6.6 (1) Inner rings
Table 6.6 (2) Outer rings
Table 6.6 (3) Effective width of inner and outer rings
10 18 30
50 80
120
180
18 30 50
80 120 180
250
0 0 0
0 0 0
0
-12 -12 -12
-15 -20 -25
-30
0 0 0
0 0 0
0
-12 -12 -12
-15 -20 -25
-30
0 0 0
0 0 0
0
-7 -8
-10
-12 -15 -18
-22
0 0 0
0 0 0
0
-5 -6 -8
-9 -10 -13
-15
12 12 12
15 20 25
30
12 12 12
15 20 25
30
4 4 4
5 5 5
6
3 3 3
3 3 3
4
9 9 9
11 15 19
23
9 9 9
11 15 19
23
5 5 5
5 5 5
5
4 4 5
5 5 7
8
Nominal bore diameter
d
mm
Bore diameter variation
Vdp
Mean bore diameter variation
Vdmp
Mean bore diameter deviation
Δdmp
Class
K
Class
N
Class
C
Class
B
Class
K
Class
N
Class
C
Class
B
Class
K
Class
N
Class
C
Class
B
Note: Please consult NTN Engineering for Class A bearings.
over incl. high low high low high low high low max max
18 30 50
80 120 150
180 250 315
30 50 80
120 150 180
250 315 400
0 0 0
0 0 0
0 0 0
-12 -14 -16
-18 -20 -25
-30 -35 -40
0 0 0
0 0 0
0 0 0
-12 -14 -16
-18 -20 -25
-30 -35 -40
0 0 0
0 0 0
0 0 0
-8 -9
-11
-13 -15 -18
-20 -25 -28
0 0 0
0 0 0
0 0 0
-6 -7 -9
-10 -11 -13
-15 -18 -20
12 14 16
18 20 25
30 35 40
12 14 16
18 20 25
30 35 40
4 4 4
5 5 5
6 8
10
3 3 3
3 3 3
4 5 5
9 11 12
14 15 19
23 26 30
9 11 12
14 15 19
23 26 30
5 5 6
7 8 9
10 13 14
4 5 5
5 6 7
8 9
10
3 3 4
4 4 5
6 6 6
Nominal outside diameter
D
mm
Outside diameter variation
VDp
Mean outside diameter variation
VDmp
outer ring axial runout
Sea
Mean outside diameter deviation
ΔDmp
Class
K
Class
N
Class
C
Class
B
Note: Please consult NTN Engineering for Class A bearings.
Class
K
over incl. high low
Class
N
high low
Class
C
high low
Class
B
high low max
Class
K
Class
N
Class
C
Class
B
Class
B
max max
80 120 180
250
10 80
120
180
0 -100 -150
-150
+100 +100 +150
+150
0 0 0
0
+50 +50 +50
+50
-100 -100 -100
-150
+100 +100 +100
+100
* * *
*
Note 1: "*" mark are to be manufactured only for combined bearings. 2: Please consult NTN Engineering for Class A bearings.
Unitμm
0 -100 -100
-100
+100 +100 +200
+200
0 0 0
0
+50 +50
+100
+100
-100 -100 -150
-150
+100 +100 +100
+100
* * *
*
Nominal bore diameter
d
mm
over incl. high low high low high low high low high low high low high low high low
Class
K
Class
N
Class
C
Class
B
Class
N
Class
K
Class
C
Class
B
* * *
*
* * *
*
Effective width deviation of roller and inner ring assembly of tapered roller bearing
ΔT1s
Tapered roller bearing outer ring effective width deviation
ΔT2s
Unitμm
18 20 25
35 40 45
50 60 70
18 20 25
35 40 45
50 60 70
5 6 6
6 7 8
10 11 13
3 3 4
4 4 4
5 5 5
Inner ring radial runout Kia
and Outer ring radial runout Kea
max
Class
K
Class
N
Class
C
Class
B
18 30 50
80 120 150
180 250 315
30 50 80
120 150 180
250 315 400
Note: Please consult NTN Engineering for Class A bearings.
Nominal outside
diameter
D
mm
over incl.
●Bearing Tolerances
A-43
Table 6.6 (4) Radial runout of inner and outer rings
3 4 4
4 5 7
8
+200 +200 +200
+200 +200 +350
+350
0 0 0
0 -200 -250
-250
+100 +100 +100
+100 +100 +150
+150
0 0 0
0 0 0
0
+200 +200 +200
+200 +200 +350
+350
-200 -200 -200
-200 -200 -250
-300
+200 +200 +200
+200 +200 +200
+200
-200 -200 -200
-200 -200 -250
-300
Inner ring axial runout
Sia Class
B
max sup inf sup inf sup inf sup inf
Class
K
Class
N
Class
C
Class
B
Overall width deviation of assembled tapered roller bearing
ΔTs
Unitμm
Master cone sub-unit
Master cup sub-unitT1 T2
φd φd
Nominal outside diameter
D
mm
over incl.
Mean outside diameter deviation
ΔDmp
0 0 0
0 0 0
0 0 0
0 0 0
-11 -13 -16
-19 -22 -25
-30 -35 -40
-45 -50 -75
Outside diameter variation
VDp
0 0 0
0 0 0
0 0 0
0 0 0
-7 -8 -9
-11 -13 -15
-20 -25 -28
-33 -38 -45
10 18 30
50 80
120
180 250 315
400 500 630
18 30 50
80 120 180
250 315 400
500 630 800
8 10 12
14 17 19
23 26 30
34 38 55
5 6 7
8 10 11
15 19 21
25 29 34
According to the tolerance of S1 against "d" of the same bearings
Raceway thickness variation
Se
Unitμm
Class
0,6,5
high low
Class
4
high low
Class
0,6,5
Class
4
max
Class
0
Class
6
Class
5
Class
4
max
Nominal bore diameter
d
mm
over incl.
0 0 0
0 0 0
0 0 0
0 0
-8 -10 -12
-15 -20 -25
-30 -35 -40
-45 -50
Bore diameter variation
Vdp
0 0 0
0 0 0
0 0 0
0 0
-7 -8
-10
-12 -15 -18
-22 -25 -30
-35 -40
― 18 30
50 80
120
180 250 315
400 500
18 30 50
80 120 180
250 315 400
500 630
6 8 9
11 15 19
23 26 30
34 38
5 6 8
9 11 14
17 19 23
26 30
10 10 10
10 15 15
20 25 30
30 35
5 5 6
7 8 9
10 13 15
18 21
3 3 3
4 4 5
5 7 7
9 11
2 2 2
3 3 4
4 5 5
6 7
Raceway thickness variation
Si
Unitμm
Class
0,6,5
high low
Class
4
high low
Class
0,6,5
Class
4
max
Class
0
Class
6
Class
5
Class
4
max
Mean bore diameter deviation
Δdmp
●Bearing Tolerances
A-44
Table 6.7 (2) Housing raceway washer
Table 6.7 (3) Bearing height
Table 6.7 Tolerance of thrust ball bearings
Table 6.7 (1) Shaft raceway washer
Nominal bore diameter
d
mm
over incl. high low
0 0 0
0 0 0
0 0 0 0
-75 -100 -125
-150 -175 -200
-225 -300 -350 -400
― 30 50
80 120 180
250 315 400 500
30 50 80
120 180 250
315 400 500 630
Unitμm
Single direction Bearing height
deviation
ΔTs
1 This standard is applied for flat back face bearing of class 0.
1
●Bearing Tolerances
A-45
Table 6.8 Tolerance of spherical thrust roller bearing
Table 6.8 (1) Shaft raceway washer
Table 6.8 (2) Housing raceway washer
50
80
0
-15
11
25
+150
-150
120 180 0 -25 19 30 +250 -250
180 250 0 -30 23 30 +300 -300250 315 0 -35 26 35 +350 -350315 400 0 -40 30 40 +400 -400
400 500 0 -45 34 45 +450 -450
80 120 0 -20 15 25 +200 -200
Unitμm
Nominal bore diameter
d
mm over incl. high low high lowmax max
Bore diameter variation
Vdp
Side runout
with bore
Sd
Bearing height deviation
ΔTs
Mean bore diameter deviation
Δdmp
120 180 250
315 400 500
630 800
180 250 315
400 500 630
800 1,000
0 0 0
0 0 0
0 0
-25 -30 -35
-40 -45 -50
-75 -100
Unitμm
Nominal outside diameter
D
mm
Single plane mean outside diameter
deviation
ΔDmp
over incl. high low
●Bearing Tolerances
A-46
Unit mm
rs min1
or
r1s min
Nominal bore diameter
d over incl.
rs max or r1s max
Radial direction
Axial direction
0.05
0.08
0.1
0.15
0.2
0.3
0.6
1
1.1
1.5
2.1
3
2.5
4
5
6
7.5
9.5
12
15
19
2
―
―
―
―
―
―
40
―
40
―
50
―
120
―
120
―
80
220
―
280
―
100
280
―
280
―
―
―
―
―
―
―
―
―
―
―
―
―
40
―
40
―
50
―
120
―
120
―
80
220
―
280
―
100
280
―
280
―
―
―
―
―
―
―
―
―
0.1
0.16
0.2
0.3
0.5
0.6
0.8
1
1.3
1.5
1.9
2
2.5
2.3
3
3
3.5
3.8
4
4.5
3.8
4.5
5
5
5.5
6.5
8
10
12.5
15
18
21
25
0.2
0.3
0.4
0.6
0.8
1
1
2
2
3
3
3.5
4
4
5
4.5
5
6
6.5
7
6
6
7
8
8
9
10
13
17
19
24
30
38
1 These are the allowable minimum dimensions of the chamfer dimension "r" or "r1" and are described in the dimensional table.
Table 6.9 Allowable critical-value of bearing chamferTable 6.9 (1) Radial bearing (Except tapered roller bearing) Table 6.9 (2) Tapered roller bearings of metric series
Unit mm
rs min2
or
r1s min
rs max or r1s max
0.3
0.6
1
5
3
―
40
―
40
―
50
―
120
250
―
120
250
―
120
250
―
120
250
400
―
120
250
400
―
180
―
180
40
―
40
―
50
―
120
250
―
120
250
―
120
250
―
120
250
400
―
120
250
400
―
180
―
180
―
0.7
0.9
1.1
1.3
1.6
1.9
2.3
2.8
3.5
2.8
3.5
4
3.5
4
4.5
4
4.5
5
5.5
5
5.5
6
6.5
6.5
7.5
7.5
9
1.4
1.6
1.7
2
2.5
3
3
3.5
4
4
4.5
5
5
5.5
6
5.5
6.5
7
7.5
7
7.5
8
8.5
8
9
10
11
2 These are the allowable minimum dimensions of the chamfer dimension "r" or "r1" and are described in the dimensional table. 3 Inner rings shall be in accordance with the division of "d" and outer rings with that of "D". Note: This standard will be applied to the bearings whose dimensional series (refer to the dimensional table) are specified in the standard of ISO 355 or JIS B 1512. For further information concerning bearings outside of these standards or tapered roller bearings using US customary unit, please contact NTN Engineering.
1.5
2
2.5
4
6
Radial direction
Axial direction
Nominal bore3 diameter of bearing
"d" or nominal outside diameter "D"
over incl.
6.2 Chamfer measurements and tolerance or allowable values of tapered bore Side face of inner
ring or center washer, or side face of outer ring
Bore diameter face of bearing or outer diameter face of bearing (Axial direction)
rs min or r1s min (Rad
ial d
irect
ion)
rs max or r1s max
rs m
in o
r r1
s m
in
rs m
ax o
r r1
s m
ax
rs min or r1s min
A-47
●Bearing Tolerances
Table 6.9 (3) Thrust bearings Table 6.10 (1) Tolerance of and tolerance values for tapered bore of radial bearingsStandard taper ratio 1:12 tapared hole (class 0)
Table 6.10 (2) Tolerance of and tolerance values for tapered bore of radial bearingsStandard taper ratio 1:30 tapered bore (class 0)
d mm
over incl. high low high low max
VdpΔdmp
10 18 30
50 80
120
180 250 315
400 500 630
800 1,000 1,250 1,600
10 18
30 50 80
120 180 250
315 400 500
630 800
1,000 1,250
0 0 0
22 27 33
+ + +
0 0 0
39 46 54
+ + +
0 0 0
63 72 81
+ + +
0 0 0
89 97
110
+ + +
0 0 0 0
125 140 165 195
+ + + +
0 0 0
15 18 21
+ + +
0 0 0
25 30 35
+ + +
0 0 0
40 46 52
+ + +
0 0 0
57 63 70
+ + +
0 0 0 0
80 90
105 125
+ + + +
9 11 13
16 19 22
40 46 52
57 63 70
― ― ― ―
Unitμm1 2-Δd1mp Δdmp
d mm
over incl.
low
Vdp
max
Δdmp
high low
high
80 120 180
250 315 400
500 630
50 80
120
180 250 315
400 500
0 0 0
+15 +20 +25
0 0 0
+30 +35 +40
0 0
+45 +50
0 0 0
+30 +35 +40
0 0 0
+46 +52 +57
0 0
+63 +70
19 22 40
46 52 57
63 70
1 Applies to all radial flat planes of inner ring tapered bore. 2 Does not apply to diameter series 7 and 8. Note: Quantifiers
For a standard taper ratio of 1:12 d1＝d＋ B
For a standard taper ratio of 1:30 d1＝d＋ B
Δdmp ：Dimensional difference of the average bore diameter within the flat surface at the theoretical small end of the tapered bore. Δd1mp ：Dimensional difference of the average bore diameter within the flat surface at the theoretical large end of the tapered bore. Vdp：Unevenness of the bore diameter with the flat surface B：Nominal width of inner ring α ：Half of the tapered bore’s nominal taper angle For a standard taper ratio of 1:12 α＝2°23′9.4″ For a standard taper ratio of 1:30 α＝0°57′7.4″
Units μm
112
1 2
130
-Δd1mp Δdmp
0.05
0.08
0.1
0.15
0.2
0.3
0.6
1
1.1
1.5
2
2.1
4
3
5
6
7.5
9.5
19
12
15
0.1
0.16
0.2
0.3
0.5
0.8
1.5
2.2
2.7
3.5
4
4.5
5.5
6.5
21
15
25
10
8
12.5
18
4 These are the allowable minimum dimensions of the chamfer dimension "r" or "r1" and are described in the dimensional table.
rs max or r1s max
Radial and axial direcitionrs min or r1 min
4
Unit mm
α
φ（d
+Δ
dmp）
φ（d1+
Δd1mp）
Δd1mp－
Δdmp
BB
φd1
φd
Theoretical tapered bore Tapered bore having dimensional difference of the average bore diameter within the flat surface
α
2
A-48
●Bearing Tolerances
6.3 Bearing tolerance measurement methodsFor reference, measurement methods for rolling bearing
tolerances are in JIS B 1515.
Table 6.11 shows some of the major methods ofmeasuring rotation tolerances.
Table 6.11 Rotation tolerance measurement methods
Inner ring radial runout (Kia)
Outer ring radial runout (Kea)
Inner ring axial runout (Sia)
Outer ring axial runout (Sea)
Inner ring side runout with bore
(Sd)
Outer ring outside surface inclination
(SD)
Characteristic tolerance Measurement method
Measuring load Measuring load
Measuring loadMeasuring load
Measuring load Measuring load
Measuring loadMeasuring load
Reinforcing plate
1.2rs max
1.2rs max
Radial runout of the inner ring is the difference between the maximum and minimum reading of the measuring device when the inner ring is turned one revolution.
Radial runout of the outer ring is the difference between the maximum and minimum reading of the measuring device when the outer ring is turned one revolution.
Axial runout of the inner ring is the difference between the maximum and minimum reading of the measuring device when the inner ring is turned one revolution.
Axial runout of the outer ring is the difference between the maximum and minimum reading of the measuring device when the outer ring is turned one revolution.
Inner ring side runout with bore is the difference between the maximum and minimum reading of the measuring device when the inner ring is turned one revolution together with the tapered mandrel.
Outer ring outside surface inclination is the difference between the maximum and minimum reading of the measuring device when the outside ring is turned one revolution along the reinforcing plate.
