7. BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
7.1.2 Dimensions of Snap Ring Grooves and
Locating Snap Rings
The dimensions of Snap ring grooves in the outer
surfaces of bearings are specified by ISO 464. Also,
the dimensions and accuracy of the locating snap rings
themselves are specified by ISO 464. The dimensions
of snap ring grooves and locating snap ring for
bearings of diameter series 8, 9, 0, 2, 3, and 4, are
shown in Table 7.4 (Pages A50 to A53).
7.1 Boundary Dimensions and Dimensions of
Snap Ring Grooves
7.1.1 Boundary Dimensions
The boundary dimensions of rolling bearings, which
are shown in Figs.7.1 through 7.5, are the dimensions
that define their external geometry. They include bore
diameter d, outside diameter D, width B, bearing
width(or height) T, chamfer dimension r, etc. It is
necessary to know all of these dimensions when
mounting a bearing on a shaft and in a housing.
These boundary dimensions have been internationally
standardized (ISO15) and adopted by JIS B 1512
(Boundary Dimensions of Rolling Bearings).
The boundary dimensions and dimension series of
radial bearings, tapered roller bearings, and thrust
bearings are listed in Table 7.1 to 7.3 (Pages A40 to
A49).
In these boundary dimension tables, for each bore
number, which prescribes the bore diameter, other
boundary dimensions are listed for each diameter
series and dimension series. A very large number
of series are possible; however, not all of them are
commercially available so more can be added in the
future. Across the top of each bearing table (7.1 to
7.3), representative bearing types and series symbols
are shown (refer to Table 7.5, Bearing Series Symbols,
Page A55).
The relative cross-sectional dimensions of radial
bearings (except tapered roller bearings) and thrust
bearings for the various series classifications are
shown in Figs. 7.6 and 7.7 respectively.
T
Diameter
Series
C
r
r1
Dimension series
r
r1
r1
70
r1
r
B
r
r
jd
r
r
r
r
r
1
13
14
T
r
jd jD
r
2
jD
Fig. 7.3 Single-Direction Thrust Ball Bearings
22
23
r
jd
r
r1
jd 2
r1
2
3
4
5
24
T1
B
T2
r
6
jD
Fig. 7.7 Comparison of Cross Sections of Thrust Bearings
(except Diameter Series 5) for Various
Dimension Series
r
69
60
68
58
59
50
48
49
40
41
42
33
38
39
30
31
32
24
23
20
21
22
29
28
19 10
11
12
13
18
04
83
08 09
00
01
02
03
Fig. 7.4 Double-Direction Thrust Ball Bearings
82
Diameter
Series
9
94
r
4
3
2
10
9
8
Dimension
Series
91
92
93
90
r
r1
1
7
10
11
12
r1
0
72
74
jd jD
Fig. 7.2 Tapered Roller Bearings
T2
8
Height
4 Series
B
r
Fig. 7.1 Boundary Dimensions of Radial Ball
and Roller Bearings
Width Series
71
73
r
01 2 3
r
jd
r
T
r
Fig. 7.6 Comparison of Cross Sections of Radial Bearings (except Tapered Roller Bearings) for various Dimensional Series
jD
r
Fig. 7.5 Spherical Thrust Roller Bearings
A 38
A024-057E.indd 38-39
A 39
11/20/13 4:50:20 PM
A 40
A024-057E.indd 40-41
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07
07
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425
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355
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280
300
315
243
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218
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180
180
190
150
160
170
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6
6
6
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2
2
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0.3 1
0.3 1
0.3 1
0.3 0.6
0.3 0.6
0.3 1
0.3 0.3
0.3 0.6
0.3 0.6
0.3 0.3
0.3 0.3
0.3 0.3
0.3 0.3
0.3 0.3
0.3 0.3
0.3 0.3
0.3 0.3
0.3 0.3
30
37
39
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0.3 0.3
0.3 0.3
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22
22
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16
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12
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16
16
22
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2300
1720
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1540
1630
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1320
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1120
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900
950
1000
750
800
850
650
670
710
560
600
620
480
520
540
420
440
460
320
360
380
260
280
300
220
230
250
180
190
210
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150
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110
120
85
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r (min.)
08 18~68
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Dimension
Series
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48
Dimension Series
Diameter Series 8
NA48
N28 NN38 NN48
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05
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09
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7
10
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12
78
78
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65
74
74
56
65
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56
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24
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212
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128 175
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109 150
115 160
122 170
95 132
103 140
109 150
82 115
85 118
88 122
73 103
78 106
80 112
60 85
63 90
71 100
54
54
57
44
50
50
37
44
44
37
37
37
25
31
31
22
25
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19
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16
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13
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11 18
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10 16
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7
7
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09
09
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02
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315
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200
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26
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39
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475
500
400
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200
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35
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13
13
13
10
11
11
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10
10
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49
Dimension Series
⎯
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545
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488
515
400
438
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355
365
375
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325
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300
230
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190
218
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160
190
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160
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136
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67
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54
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46
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34
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30
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27
27
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23
23
23
18
23
23
16
16
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59
Diameter Series 9
⎯
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710
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615
650
690
545
580
615
462
488
500
412
438
450
345
355
400
308
308
325
250
290
290
218
250
250
218
218
218
145
180
180
125
145
145
109
109
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90
90
109
71
71
80
63
63
71
54
54
63
45
45
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40
40
45
36
36
40
30
30
30
23
30
30
22
22
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69
NA49 NA59 NA69
N29 NN39 NN49
⎯
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7.5
9.5
9.5
7.5
7.5
7.5
7.5
7.5
7.5
6
6
6
6
6
6
5
5
6
5
5
5
4
4
4
3
4
4
3
3
3
2.1
2.1
2.1
2
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2.1
2
2
2
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1.5
2
1.1
1.1
1.1
1.1
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1
1
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1
1
1
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0.6
1
0.6
0.6
0.6
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
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9.5
9.5
7.5
7.5
7.5
7.5
7.5
7.5
6
6
6
6
6
6
5
5
6
5
5
5
4
4
4
3
4
4
3
3
3
2.1
2.1
2.1
2
2.1
2.1
2
2
2
1.5
1.5
2
1.1
1.1
1.1
1.1
1.1
1.1
1
1
1.1
1
1
1
0.6
0.6
1
0.6
0.6
0.6
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.15
0.2
0.3
0.15 ⎯
0.2 0.15
0.2 0.15
0.15
0.15
0.15
⎯
0.1
0.15
12
⎯ 12
⎯
⎯
⎯
⎯ 9.5 9.5
⎯ 9.5 9.5
12
⎯ 12
7.5
⎯
⎯
7.5
7.5
7.5
6
6
7.5
6
6
6
5
5
6
5
5
5
4
4
4
3
4
4
2.1
3
3
2.1
2.1
2.1
1.5
2
2
1.1
1.5
1.5
1
1
1.1
1
1
1
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.3
0.3
0.6
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
⎯
0.3
0.3
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
r (min.)
820
870
920
700
720
780
620
650
680
540
560
600
460
480
520
360
400
420
290
310
340
240
260
280
200
210
225
160
170
180
140
145
150
115
125
130
95
100
110
75
80
90
58
62
68
47
52
55
35
42
44
26
28
32
19
22
24
12
14
17
7
8
9
⎯
⎯
6
D
82
85
92
71
71
80
63
67
71
57
57
63
50
50
57
37
44
44
31
34
37
25
28
31
22
22
24
18
19
19
16
16
16
13
14
14
11
11
13
10
10
11
9
9
9
8
8
9
8
8
8
⎯
7
8
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
00
⎯
⎯
2240
2360
2500
1850
1950
2120
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1580 145
1660 155
1750 ⎯
1360 132
1420 136
1500 140
1150 112
1220 118
1280 122
980 100
1030 103
1090 109
09 19~39 49~69
Dimension Series
160
⎯
⎯
280
290
308
230
243
272
200
212
218
180
185
195
155
165
170
136
140
150
115
118
128
100
100
112
90
94
100
82
82
90
74
74
82
56
65
65
46
51
56
38
42
46
33
33
35
26
28
28
24
24
24
20
22
22
18
18
20
16
16
18
13
14
15
12
12
13
10
12
12
08
08
09
06
07
07
04
05
06
02.8
02.8
03
⎯
⎯
02.5
10
N10
60
70
240
⎯
⎯
365
375
400
300
315
355
265
272
290
236
243
250
200
212
218
180
185
195
150
155
170
128
128
145
118
122
128
106
106
118
95
95
106
72
82
82
60
66
72
48
54
60
42
42
45
33
36
36
30
30
30
24
27
27
22
22
24
19
19
22
16
17
18
14
15
16
12
14
14
10
10
11
8
9
10
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
20
⎯
⎯
475
500
530
400
412
462
345
355
375
300
308
325
258
272
280
230
236
250
195
200
212
165
167
185
150
157
163
134
135
148
118
121
133
92
104
106
75
82
90
60
67
74
52
53
56
41
45
46
37
37
37
30
34
34
26
26
30
23
23
26
20
20
21
16
18
19
14
16
16
12
12
13
10
11
12
06
07
09
03.5
04
05
⎯
⎯
03
B
30
⎯
⎯
630
650
690
530
545
615
462
475
500
412
412
438
345
365
375
308
315
335
258
272
290
218
218
250
200
212
218
180
180
200
160
160
180
118
140
140
100
109
118
80
90
100
69
69
75
56
60
60
50
50
50
40
45
45
35
35
40
30
30
35
26
27
28
22
24
25
18
22
22
16
16
17
⎯
14
15
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
40
Dimension Series
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
9.5
9.5
⎯
7.5
7.5
9.5
7.5
7.5
7.5
6
6
7.5
6
6
6
5
5
6
5
5
5
4
4
5
4
4
4
2.1
3
3
2
2
2.1
1.5
1.5
2
1.1
1.1
1.1
1
1
1
1
1
1
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
⎯
0.3
0.3
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
12
15
15
12
12
12
09.5
09.5
09.5
07.5
07.5
09.5
07.5
07.5
07.5
07.5
07.5
07.5
06
06
07.5
06
06
06
05
06
06
05
05
05
04
04
05
03
04
04
02.1
02.1
03
02.1
02.1
02.1
02
02
02.1
02
02
02
1.5
1.5
1.5
1.1
1.1
1.1
1.1
1.1
1.1
1
1
1.1
1
1
1
0.6
0.6
1
0.3
0.6
0.6
0.3
0.3
0.3
0.3
0.3
0.3
0.2
0.2
0.3
0.15
0.15
0.15
⎯
⎯
0.15
r (min.)
00 10~60
825
875
⎯
730
750
800
630
670
690
560
580
615
462
488
515
400
400
450
355
375
400
325
325
355
290
290
325
218
250
250
180
200
218
145
160
180
125
125
136
100
109
109
90
90
90
71
80
80
63
63
71
54
54
63
47
48
50
40
43
45
32
40
40
29
29
30
⎯
25
27
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
60
Dimension
Series
615
650
⎯
560
560
600
475
500
515
425
438
462
355
365
388
300
300
335
272
280
300
243
243
272
218
218
243
160
190
190
136
150
160
109
122
136
95
95
100
75
80
80
67
67
67
54
60
60
46
46
54
40
40
46
35
36
38
30
32
34
24
30
30
21
21
23
⎯
19
20
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
50
Diameter Series 0
230
N20 NN30 NN40
Units: mm
Remarks The chamfer dimensions listed in this table do not necessarily apply to the following chamfers: (a) Chamfers of the grooves in outer rings that have snap ring grooves.
(b) For thin section cylindrical roller bearings, the chamfers on side without rib and bearing bore (in case of an inner ring) or outer surface (in case of an outer ring).
(c) For angular contact ball bearings, the chamfers between the front face and bore (in case of an inner ring) or outer surface (in case of an outer ring).
(d) Chamfers on inner rings of bearings with tapered bores.
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
300
320
340
60
64
68
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
240
260
280
48
52
56
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
190
200
220
38
40
44
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
160
170
180
32
34
36
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
130
140
150
⎯
⎯
⎯
130
140
150
26
28
30
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
105
110
120
21
22
24
115
120
125
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
90
95
100
18
19
20
95
100
110
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
75
80
85
15
16
17
78
85
90
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
60
65
70
12
13
14
58
65
72
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
45
50
55
09
10
11
44
47
52
26
32
34
⎯
⎯
⎯
0.2
0.2
⎯
19
21
24
⎯
⎯
⎯
5
5
⎯
⎯
⎯
⎯
0.1
0.2
0.2
14
16
17
9
11
13
⎯
⎯
⎯
32
35
40
/32
07
08
4
4
⎯
4.5
5
5
⎯
⎯
⎯
0.1
0.1
0.1
0.08
0.08
0.1
⎯
⎯
⎯
25
28
30
05
/28
06
23
27
⎯
3
4
4
3.5
3.5
4.5
3
⎯
⎯
3
3
3.5
5
6
7
⎯
⎯
⎯
17
20
22
03
04
/22
15
18
21
2.5
2.5
3
2.5
2.5
3
0.05
0.08
0.08
37
40
42
10
12
15
00
01
02
11
12
14
2
2
2.5
2
2.3
3
⎯
⎯
2.5
2.5
3
4
D
0.2
⎯
0.2
7
8
9
7
8
9
7
8
10
1.2
1.5
2
⎯
⎯
1.8
⎯
⎯
⎯
(min.)
0.05
0.05
0.05
r
37 17~37
5
⎯
5
4
5
6
4
5
6
4
5
6
0.8
1
1
B
27
⎯
⎯
⎯
2
2.5
3
2
⎯
3
2
2.5
3
17
Dimension Series
4
⎯
4
0.6
1
1.5
⎯
1
⎯
D
Diameter Series 7
32
⎯
37
d
Single-Row
Ball Brgs.
Double-Row Ball
Brgs.
Cylindrical Roller
Brgs.
Needle Roller
Brgs.
Spherical Roller
Brgs.
Bore Number
Table 7. 1 Boundary Dimensions of Radial Bearings (except Tapered Roller Bearings) ⎯ 1 ⎯
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
A 41
11/20/13 4:50:21 PM
A 42
A024-057E.indd 42-43
4
5
6
7
8
9
10
12
15
17
20
22
25
28
30
32
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
120
130
140
150
160
170
180
190
200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
530
560
600
630
670
710
750
800
850
900
950
1000
1060
1120
1180
1250
1320
1400
1500
7
8
9
00
01
02
03
04
/22
05
/28
06
/32
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
24
26
28
30
32
34
36
38
40
44
48
52
56
60
64
68
72
76
80
84
88
92
96
/500
/530
/560
/600
/630
/670
/710
/750
/800
/850
/900
/950
/1000
/1060
/1120
/1180
/1250
/1320
/1400
/1500
19
21
22
22
22
24
24
27
27
30
30
31
33
39
39
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
30
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
21
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
2060
2180
2300
1750
1850
1950
1500
1580
1660
1280
1360
1420
1090
1150
1220
920
980
1030
790
830
870
700
720
760
600
620
650
500
540
580
400
440
460
320
340
370
270
280
300
210
225
250
175
180
200
243
258
265
280
290
308
325
345
355
⎯
⎯
⎯
⎯
⎯
⎯
212
224
230
185
195
206
160
170
175
136
145
150
122
122
132
106
106
112
90
100
106
74
82
82
60
65
69
51
51
56
38
40
46
175
185
190
155
165
165
136
140
150
115
122
128
100
106
109
88
88
95
78
78
80
63
71
78
50
57
57
42
44
48
34
34
37
25
27
31
425
450
462
365
388
400
315
335
345
272
290
300
243
250
272
206
218
230
180
190
195
165
165
175
140
140
145
118
128
140
95
106
106
78
82
88
66
66
72
48
50
60
42
42
48
16
17
18
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
33
33
38
13
15
16
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
22
22
25
12
12
12
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
150
160
165
9
10
10
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
560
580
600
475
500
530
438
462
475
375
400
412
336
345
365
280
300
315
248
264
272
224
226
240
192
194
200
160
176
190
128
144
146
104
112
120
86
88
96
64
68
80
56
56
62
45
52
52
37
37
41
30
34
34
26
26
30
23
25
26
19
20
21
15
18
19
14
14
14
11
12
12
⎯
7
10
⎯
⎯
8
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
750
775
800
630
670
710
545
580
600
475
500
515
412
438
475
355
375
400
308
325
335
280
280
300
243
243
250
200
218
243
160
180
180
128
140
150
109
109
118
80
85
100
69
69
80
60
65
65
50
50
56
40
45
45
35
35
40
30
33
35
25
27
28
20
24
25
18
18
18
14
15
16
⎯
⎯
⎯
⎯
⎯
⎯
04
04
05
04
04
04
⎯
⎯
⎯
⎯
⎯
⎯
15
19
19
15
15
15
12
12
15
09.5
12
12
09.5
12
12
12
12
12
07.5
09.5
09.5
07.5
07.5
07.5
07.5
09.5
09.5
07.5
07.5
07.5
07.5
07.5
07.5
06
06
07.5
06
06
06
06
07.5
07.5
05
05
06
05
05
06
05
05
05
03
03
04
03
03
03
05
05
05
02.1
02.1
03
02
02.1
02.1
02
02
02
2
2
2
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
02
02
02.1
01.5
01.5
02
01.1
01.1
01.5
⎯
⎯
1.1
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
41
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
31
Dimension
Series
01 11~41
r (min.)
21
241
B
11
01
D
Dimension Series
Diameter Series 1
231
NN 31
⎯
⎯
⎯
⎯
⎯
⎯
1660
1750
⎯
1420
1500
1580
1220
1280
1360
1030
1090
1150
870
920
980
760
790
830
650
680
720
540
580
620
440
480
500
340
360
400
290
310
320
230
250
270
190
200
215
160
170
180
130
140
150
110
120
125
85
90
100
65
72
80
52
58
62
40
47
50
30
32
35
22
24
26
13
16
19
⎯
⎯
10
⎯
⎯
⎯
D
36
38
40
40
42
45
48
52
52
55
58
65
72
80
80
85
92
92
95
95
103
109
112
118
125
136
145
150
155
165
175
180
195
200
206
218
230
243
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
30
32
34
25
26
28
22
23
24
19
20
21
17
17
18
15
16
16
12
14
14
9
10
11
7
8
8
5
5
6
⎯
⎯
⎯
⎯
⎯
⎯
315
330
⎯
272
280
300
243
250
265
206
212
230
170
185
200
150
155
165
122
132
140
98
105
118
85
90
90
65
70
78
58
62
62
⎯
⎯
⎯
⎯
⎯
⎯
412
425
⎯
355
375
388
315
325
345
272
280
300
224
243
258
195
200
212
170
175
185
140
150
165
120
130
130
92
98
108
80
86
86
64
68
73
50
53
58
⎯
⎯
42
46
50
54
40
43
46
31
33
36
28
31
31
23
23
25
21
23
23
18
19
20
16
18
18
14
14
14
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
22
⎯
⎯
⎯
B
⎯
⎯
⎯
12
Dimension Series
⎯
⎯
⎯
⎯
⎯
⎯
530
560
⎯
488
515
515
438
450
475
365
388
412
310
336
355
272
280
296
232
240
256
192
208
224
160
174
176
120
128
144
104
110
112
080
088
096
065.1
069.8
076
52.4
55.6
60.3
41.3
44.4
49.2
36.5
38.1
39.7
30.2
30.2
33.3
25
27
30.2
20.6
23
23.8
17.5
20.6
20.6
14.3
15.9
15.9
11
12
13
07
08
10
⎯
⎯
05
⎯
⎯
⎯
32
Diameter Series 2
232
52
53
N 32
42
22
N 22
222
632
622
⎯
⎯
⎯
02
27
28
⎯
22
24
25
18
19
21
16
18
18
13
13
14
11
12
13
10
10
10
08
09
09
07
07
08
05
05
06
03
03.5
04
⎯
⎯
02.5
⎯
⎯
⎯
82
N2
62
72
12
⎯
⎯
⎯
⎯
⎯
⎯
710
750
⎯
615
650
670
545
560
615
475
488
515
388
412
450
335
345
365
290
300
315
243
258
280
200
218
218
150
160
180
128
140
140
100
109
118
85
90
95
69
75
80
56
60
65
50
56
56
40
40
45
33
37
40
27
30
32
22
27
27
⎯
⎯
20
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
42
03
04
04
04
04
04
04
05
05
05
05
06
06
06
06
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
15
15
⎯
15
15
15
12
12
15
09.5
09.5
12
07.5
07.5
09.5
07.5
07.5
07.5
03
03
03
⎯
⎯
⎯
⎯
⎯
⎯
02.1
02.1
02.1
2
2.1
2.1
1.5
2
2
1.5
1.5
1.5
1.1
1.1
1.5
1
1.1
1.1
1
1
1
0.6
1
1
0.6
0.6
0.6
0.3
0.3
0.3
0.2
0.3
0.3
⎯
⎯
0.15
⎯
⎯
⎯
1.5
1.5
⎯
1.1
1.1
1.5
1
1
1.1
1
1
1
0.6
0.6
0.6
0.6
0.6
0.6
0.3
0.6
0.6
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.15
0.15
0.2
⎯
⎯
0.1
⎯
⎯
⎯
r (min.)
Dimension
Series
82 02~42
⎯
⎯
⎯
⎯
⎯
⎯
1850
1950
⎯
1600
1700
1780
1360
1420
1500
1150
1220
1280
980
1030
1090
850
900
950
750
780
820
620
670
710
500
540
580
400
420
460
340
360
380
280
300
320
225
240
260
190
200
215
160
170
180
130
140
150
100
110
120
75
80
90
62
68
72
47
52
56
35
37
42
26
28
30
16
19
22
⎯
⎯
13
⎯
⎯
⎯
D
9
9
9
125
128
136
136
145
155
160
170
180
190
200
206
218
224
236
258
272
280
290
300
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
109
112
118
95
102
108
78
80
88
68
72
75
58
62
65
49
50
55
43
45
47
37
39
41
31
33
35
25
27
29
20
21
23
17
18
19
14
15
16
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
48
50
⎯
37
42
44
30
33
36
27
28
30
22
24
25
17
19
21
14
14
16
12
13
13
10
10
11
11
12
13
9
9
10
⎯
⎯
⎯
5
5
6
7
⎯
⎯
⎯
⎯
⎯
03
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
83
Diameter Series 3
223
43
23
N 23
623
⎯
⎯
⎯
⎯
⎯
⎯
400
412
⎯
355
375
388
300
308
325
258
272
280
218
230
243
190
200
212
170
175
185
140
155
165
114
123
132
92
97
106
79
84
88
66
70
75
53
57
62
⎯
⎯
51
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
515
545
⎯
462
488
500
400
412
438
335
355
375
290
300
325
250
265
280
224
230
243
185
200
212
155
165
175
132
138
145
114
120
126
93
102
108
77
80
86
64
67
73
55
58
60
46
48
51
36
40
43
28
31
33
24
24
27
19
21
21
17
17
17
13
13
14
⎯
⎯
11
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
23
⎯
⎯
⎯
⎯
⎯
⎯
B
13
Dimension Series
213
N3
63
73
13
⎯
⎯
⎯
⎯
⎯
⎯
670
710
⎯
600
630
650
515
530
560
438
462
488
375
388
412
315
345
365
290
300
308
236
258
272
195
206
224
155
165
180
136
140
150
112
118
128
087.3
092.1
106
73
77.8
82.6
68.3
68.3
73
54
58.7
63.5
39.7
44.4
49.2
32
34.9
36.5
25.4
30
30.2
22.2
22.2
25
19
19
19
15
15
16
09
10
13
⎯
⎯
07
⎯
⎯
⎯
33
53
33
N 33
633
05
05
05
05
06
06
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
19
19
⎯
15
19
19
15
15
15
12
15
15
09.5
12
12
09.5
09.5
09.5
07.5
07.5
07.5
07.5
07.5
07.5
04
04
04
⎯
⎯
⎯
⎯
⎯
⎯
04
04
04
03
03
03
3
3
3
2.1
2.1
3
2.1
2.1
2.1
1.5
2
2
1.1
1.5
1.5
1.1
1.1
1.1
1
1.1
1.1
0.6
1
1
0.3
0.3
0.6
0.3
0.3
0.3
⎯
⎯
0.2
⎯
⎯
⎯
3
4
⎯
2.1
3
3
2
2
2.1
1.5
1.5
2
1.1
1.1
1.5
1
1
1.1
0.6
0.6
1
0.6
0.6
0.6
0.6
0.6
0.6
0.3
0.3
0.3
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
r (min.)
Dimension
Series
83 03~33
r
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1500
⎯
⎯
1280
1360
1420
1120
1150
1220
980
1030
1060
850
900
950
710
750
800
580
620
670
460
480
540
400
420
440
340
360
380
260
280
310
225
240
250
190
200
210
150
160
180
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
290
⎯
⎯
258
272
280
230
236
250
206
212
218
180
190
200
150
155
165
122
132
140
98
102
115
88
92
95
78
82
85
60
65
72
54
55
58
45
48
52
35
37
42
29
31
33
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
475
⎯
⎯
412
438
450
365
375
400
325
335
345
280
300
315
236
250
265
190
206
224
155
160
180
142
145
150
128
132
138
100
108
118
90
95
98
77
80
86
60
64
74
50
53
57
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
15
⎯
⎯
15
15
15
15
15
15
12
12
12
09.5
09.5
12
07.5
09.5
09.5
06
07.5
07.5
06
06
06
05
05
06
05
05
05
04
04
05
4
4
4
3
3
4
2.1
2.1
3
2
2.1
2.1
⎯
1.5
2
⎯
43
46
⎯
25
27
⎯
100
110
120
130
140
1.5
⎯
1.5
1.1
1.1
⎯
36
⎯
40
29
33
⎯
0.6
1
1.1
⎯
0.6
0.6
⎯
14
15
16
19
24
⎯
⎯
⎯
⎯
⎯
⎯
(min.)
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
04~24
Dimension
Series
21
⎯
23
17
19
⎯
12
13
15
⎯
10
11
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
B
Dimension
Series
04
24
Diameter Series 4
N4
80
⎯
90
62
72
⎯
37
42
52
⎯
30
32
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
D
Units: mm
64
74
104
Remarks The chamfer dimensions listed in this table do not necessarily apply to the following chamfers: (a) Chamfers of the grooves in outer rings that have snap ring grooves.
(b) For thin section cylindrical roller bearings, the chamfers on side without rib and bearing bore (in case of an inner ring) or outer surface (in case of an outer ring).
(c) For angular contact ball bearings, the chamfers between the front face and bore (in case of an inner ring) or outer surface (in case of an outer ring).
(d) Chamfers on inner rings of bearings with tapered bores.
3
4
5
6
⎯
2
2.5
3
1
0.6
1
1.5
2
⎯
⎯
d
Single-Row
Ball Brgs.
Double-Row
Ball Brgs.
Cylindrical
Roller Brgs.
Needle Roller
Brgs.
Spherical Roller
Brgs.
Bore Number
Table 7. 1 Boundary Dimensions of Radial Bearings (except Tapered Roller Bearings) ⎯ 2 ⎯
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
A 43
11/20/13 4:50:25 PM
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
Table 7. 2 Boundary Dimensions of
Tapered Roller Bearings
Units: mm
329
320 X
Bore Number
Diameter Series 9
d
331
Diameter Series 0
Chamfer
Dimension
Dimension Series 29
1
330
2
D
20
30
C
T
B
C
T
r
(min.)
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
11.6
12
12
9
9
12
12
0.3
0.3
11.6
12
12
12
9
9
9
12
12
12
00
01
02
10
12
15
⎯
⎯
⎯
03
04
/22
17
20
22
⎯
⎯
37
40
11
05
/28
06
25
28
30
42
45
47
11
/32
07
08
32
35
40
52
55
62
13
14
⎯
⎯
⎯
14
15
15
14
15
10
11.5
12
09
10
11
45
50
55
68
72
80
14
14
16
⎯
⎯
⎯
15
15
17
15
15
17
12
13
14
60
65
70
85
90
100
16
16
19
⎯
⎯
⎯
17
17
20
15
16
17
75
80
85
105
110
120
19
19
22
⎯
⎯
⎯
18
19
20
90
95
100
125
130
140
22
22
24
21
22
24
105
110
120
145
150
165
26
28
30
130
140
150
32
34
36
C
T
15
17
303 or 303D
313
Diameter Series 2
Tapered
Roller
Brgs.
323
Diameter Series 3
Dimension Series
Chamfer
Dimension
Dimension
Dimension
Dimension
Chamfer
Dimension
Dimension Series
Dimension
Dimension
Chamfer
Dimension
Cone Cup
31
Cone Cup
Series 02
Series 22
Series 32
Cone Cup
03
Series 13
Series 23
Cone Cup
D
B
332
Chamfer
Dimension
D
B
322
Diameter Series 1
Dimension Series Dimension Series
Cone Cup
302
r
D
B
C
T
r
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
0.3
0.6
0.6
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
0.6
1
1
0.6
1
1
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
B
C
T
⎯
⎯
⎯
⎯
13
14
⎯
⎯
⎯
⎯
11
12
13
14
0.3
0.3
0.3
0.3
15
17
0.3
0.6
0.6
(min.)
D
B
C
T
r
14
14
14
⎯ 014.7 ⎯
⎯ 014.75 ⎯
⎯ 014.75 ⎯
⎯
⎯
⎯
⎯
⎯
⎯
0.6
0.6
0.6
0.6
0.6
0.6
13.25
15.25
15.25
16
18
18
14 017.25
15 019.25
15 019.25
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1
1
1
13
14
14
16.25
17.25
17.25
18
19
20
15 019.25
16 020.25
17 021.25
22
24
25
18
19
19.5
22
24
25
B
C
T
30
32
35
9
10
11
⎯
9
10
9.70
10.75
11.75
⎯
⎯
⎯
40
47
50
12
14
14
11
12
12
⎯
⎯
⎯
52
58
62
15
16
16
(min.)
d
Bore Number
Tapered
Roller
Brgs.
B
C
T
(1)
C
T
B
C
11
⎯ 011.9 ⎯
⎯ 012.9 ⎯
⎯ 014.25 ⎯
⎯
⎯
⎯
⎯
⎯
⎯
17
17
17
14
0.6
1
018.25 1
0.6
1
1
10
12
15
00
01
02
14
15
16
12
13
14
⎯ 015.25 ⎯
⎯ 016.25 ⎯
⎯ 017.25 ⎯
⎯
⎯
⎯
⎯
⎯
⎯
19
21
21
16
18
18
020.25 1
022.25 1.5
022.25 1.5
1
1.5
1.5
17
20
22
03
04
/22
62
68
72
17
18
19
15
15
16
13 018.25
14 019.75
14 020.75
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
24
24
27
20
20
23
025.25 1.5
025.75 1.5
028.75 1.5
1.5
1.5
1.5
25
28
30
05
/28
06
C C
35
37
42
11
12
13
1
1
1
47
52
56
1
1
1
1
1
1
T
⎯
⎯
11
12
⎯
⎯
⎯
0.3
0.3
35
42
44
13
15
15
12
11.5
13
15
15
0.3
0.3
0.3
0.3
0.3
0.3
47
52
55
15
16
17
11.5
12
13
15
16
17
17
14
17
20
16
20
14
14
15
0.6
0.6
0.6
0.6
0.6
0.6
58
62
68
17
18
19
13
14
14.5
17
18
19
⎯
⎯
⎯
21
22
17
18
21
22
1
1
1
1
1
1
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
75
26
20.5
26
1.5
1.5
65
72
80
17
17
18
15
15
16
18.25
18.25
19.75
21
23
23
18 022.25
19 024.25
19 024.75
26
28
32
20.5
22
25
26
28
32
1
1.5
1.5
1
1.5
1.5
75
80
90
20
21
23
17
18
20
15 021.75
15 022.75
17 025.25
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
28
31
33
24
25
27
029.75 1.5
032.75 2
035.25 2
1.5
1.5
1.5
32
35
40
/32
07
08
12
12
14
15
15
17
0.6
0.6
1
0.6
0.6
1
75
80
90
20
20
23
15.5
15.5
17.5
20
20
23
24
24
27
19
19
21
24
24
27
1
1
1.5
1
1
1.5
80
85
95
26
26
30
20.5
20
23
26
26
30
1.5
1.5
1.5
1.5
1.5
1.5
85
90
100
19
20
21
16
17
18
20.75
21.75
22.75
23
23
25
19 024.75
19 024.75
21 026.75
32
32
35
25
24.5
27
32
32
35
1.5
1.5
2
1.5
1.5
1.5
100
110
120
25
27
29
22
23
25
18 027.25
19 029.25
21 031.5
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
36
40
43
30
33
35
038.25 2
042.25 2.5
045.5 2.5
1.5
2
2
45
50
55
09
10
11
17
17
20
14
14
16
17
17
20
1
1
1
1
1
1
95
100
110
23
23
25
17.5
17.5
19
23
23
25
27
27
31
21
21
25.5
27
27
31
1.5
1.5
1.5
1.5
1.5
1.5
100
110
120
30
34
37
23
26.5
29
30
34
37
1.5
1.5
2
1.5
1.5
1.5
110
120
125
22
23
24
19
20
21
23.75
24.75
26.25
28
31
31
24 029.75
27 032.75
27 033.25
38
41
41
29
32
32
38
41
41
2
2
2
1.5
1.5
1.5
130
140
150
31
33
35
26
28
30
22 033.5
23 036
25 038
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
46
48
51
37
39
42
048.5
051
054
3
3
3
2.5
2.5
2.5
60
65
70
12
13
14
20
20
23
20
20
23
16
16
18
20
20
23
1
1
1.5
1
1
1.5
115
125
130
25
29
29
19
22
22
25
29
29
31
36
36
25.5
29.5
29.5
31
36
36
1.5
1.5
1.5
1.5
1.5
1.5
125
130
140
37
37
41
29
29
32
37
37
41
2
2
2.5
1.5
1.5
2
130
140
150
25
26
28
22
22
24
27.25
28.25
30.50
31
33
36
27 033.25
28 035.25
30 038.5
41
46
49
31
35
37
41
46
49
2
2.5
2.5
1.5
2
2
160
170
180
37
39
41
31
33
34
26 040
27 042.5
28 044.5
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
55
58
60
45
48
49
058
061.5
063.5
3
3
4
2.5
2.5
3
75
80
85
15
16
17
⎯
⎯
⎯
23
23
25
23
23
25
18
18
20
23
23
25
1.5
1.5
1.5
1.5
1.5
1.5
140
145
150
32
32
32
24
24
24
32
32
32
39
39
39
32.5
32.5
32.5
39
39
39
2
2
2
1.5
1.5
1.5
150
160
165
45
49
52
35
38
40
45
49
52
2.5
2.5
2.5
2
2
2
160
170
180
30
32
34
26
27
29
32.50
34.50
37.00
40
43
46
34 042.5
37 045.5
39 049
55
58
63
42
44
48
55
58
63
2.5
3
3
2
2.5
2.5
190
200
215
43
45
47
36
38
39
30 046.5
32 049.5
⎯ 051.5
⎯
⎯
⎯
⎯
⎯
⎯
51
35
56.5
64
67
73
53
55
60
067.5
071.5
077.5
4
4
4
3
3
3
90
95
100
18
19
20
24
24
27
⎯
⎯
⎯
25
25
29
25
25
29
20
20
23
25
25
29
1.5
1.5
1.5
1.5
1.5
1.5
160
170
180
35
38
38
26
29
29
35
38
38
43
47
48
34
37
38
43
47
48
2.5
2.5
2.5
2
2
2
175
180
200
56
56
62
44
43
48
56
56
62
2.5
2.5
2.5
2
2
2
190
200
215
36
38
40
30
32
34
39.00
41.00
43.50
50
53
58
43 053
46 056
50 061.5
68
52
68
⎯
⎯
3
3
3
2.5
2.5
2.5
225
240
260
49
50
55
41
42
46
⎯ 053.5
⎯ 054.5
⎯ 059.5
53
57
62
36
38
42
58.0
63.0
68.0
77
80
86
63
65
69
081.5
084.5
090.5
4
4
4
3
3
3
105
110
120
21
22
24
180
190
210
30
30
36
⎯
⎯
⎯
32
32
38
32
32
38
25
25
30
32
32
38
2
2
2.5
1.5
1.5
2
200
210
225
45
45
48
34
34
36
45
45
48
55
56
59
43
44
46
55
56
59
2.5
2.5
3
2
2
2.5
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
230
250
270
40
42
45
34
36
38
43.75
45.75
49.00
64
68
73
54 067.75
58 071.75
60 077
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
4
4
3
3
3
280
300
320
58
62
65
49
53
55
⎯ 063.75
⎯ 067.75
⎯ 072
66
70
75
44
47
50
72.0 93
77.0 102
82.0 108
78
85
90
098.75 5
107.75 5
114
5
4
4
4
130
140
150
26
28
30
160
170
180
220
230
250
36
36
42
⎯
⎯
⎯
38
38
45
38
38
45
30
30
34
38
38
45
2.5
2.5
2.5
2
2
2
240
260
280
51
57
64
38
43
48
51
57
64
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
3
3
3
2.5
2.5
2.5
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
290
310
320
48
52
52
40
43
43
52.00
57.00
57.00
80
86
86
67 084
71 091
71 091
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
5
5
3
4
4
340
360
380
68
72
75
58
62
64
⎯ 075
⎯ 080
⎯ 083
79
84
88
⎯
⎯
⎯
87.0 114
92.0 120
97.0 126
95 121
100 127
106 134
5
5
5
4
4
4
160
170
180
32
34
36
38
40
44
190
200
220
260
280
300
42
48
48
⎯
⎯
⎯
45
51
51
45
51
51
34
39
39
45
51
51
2.5
3
3
2
2.5
2.5
290
310
340
64
70
76
48
53
57
64
70
76
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
3
3
4
2.5
2.5
3
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
340
360
400
55
58
65
46
48
54
60.00
64.00
72.00
92
98
108
75 097
82 104
90 114
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
5
5
4
4
4
400
420
460
78
80
88
65
67
73
⎯ 086
⎯ 089
⎯ 097
92
97
106
⎯
⎯
⎯
101.0 132
107.0 138
117.0 145
109 140
115 146
122 154
6
6
6
5
5
5
190
200
220
38
40
44
48
52
56
240
260
280
320
360
380
48
⎯
⎯
⎯
⎯
⎯
51
⎯
⎯
51
63.5
63.5
39
48
48
51
63.5
63.5
3
3
3
2.5
2.5
2.5
360
400
420
76
87
87
57
65
65
76
87
87
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
5
5
3
4
4
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
440
480
500
72
80
80
60
67
67
79.00
89.00
89.00
120
130
130
100 127
106 137
106 137
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
6
6
4
5
5
500
540
580
95
102
108
80
85
90
⎯ 105
⎯ 113
⎯ 119
114
123
132
⎯
⎯
⎯
125.0 155
135.0 165
145.0 175
132 165
136 176
145 187
6
6
6
5
6
6
240
260
280
48
52
56
60
64
68
72
300
320
340
360
420
440
460
480
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
76
76
76
76
57
57
57
57
76
76
76
76
4
4
4
4
3
3
3
3
460
480
100
100
74
74
100
100
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
5
4
4
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
540
580
85
92
71
75
96.00 140
104.00 150
115 149
125 159
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
6
5
5
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
300
320
340
360
60
64
68
72
⎯
11
⎯
⎯
⎯
⎯
⎯
⎯
⎯
11.6
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Remarks 1. Other series not conforming to this table are also specified by ISO.
Remarks 2. In the Dimension Series of Diameter Series 9, Classification1is those specified by the old standard, Classification 2
is those specified by the ISO.
Remarks 2. Dimension Series not classified conform to dimensions (D, B, C, T) specified by ISO.
Remarks 3. The chamfer dimensions listed are the minimum permissible dimensions specified by ISO. They do not apply to
chamfers on the front face.
A 44
A024-057E.indd 44-45
⎯
⎯
⎯
⎯
Note
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯ 017.9
⎯ 017.9
(min.)
28
32
⎯
⎯
⎯
T
r
B
B
(min.)
⎯
⎯
⎯
⎯
(1) Regarding steep-slope bearing 303D, in DIN, the one corresponding to 303D of JIS is numbered 313. For bearings with
bore diameters larger than 100 mm, those of dimension series 13 are numbered 313.
A 45
11/20/13 4:50:29 PM
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
Table 7. 3 Boundary Dimensions of
Thrust Bearings (Flat Seats) ⎯ 1 ⎯
Units: mm
511
512
Bore Number
Spherical Thrust
Roller Brgs.
d
522
513
292
Diameter Series 0
Diameter Series 1
Dimension Series
Dimension Series
70
90
71
10
r (min.)
D
91
72
92
Diameter Series 4
Dimension Series
22
22
73
Central Washer
T
T
12
D
r (min.) r1 (min.)
93
13
Diameter Series 5
Dimension
Series
Dimension Series
23
D
23
74
Central Washer
r (min.) r1 (min.)
94
14
24
D
24
95
Central Washer
T
T
Thrust Ball
Brgs.
Spherical Thrust
Roller Brgs.
524
294
Diameter Series 3
Dimension Series
r (min.)
514
293
Diameter Series 2
11
D
523
r (min.) r1 (min.)
B
⎯
⎯
⎯
⎯
⎯
⎯
0.3
0.3
0.3
⎯
⎯
⎯
20
24
26
7
8
8
⎯
⎯
⎯
11
12
12
0.6
0.6
0.6
⎯
⎯
0.3
30
32
37
9
9
10
⎯
⎯
⎯
r (min.) d
D
T
d2
Bore Number
Thrust Ball Brgs.
T
d2
B
d2
B
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
0.6
0.6
0.6
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
6
8
4
6
8
14
14
15
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
0.6
0.6
0.6
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
10
12
15
00
01
02
0.6
1
1
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
0.3
60
16
21
24
45
15
11
⎯
⎯
⎯
⎯
1
0.6
52
60
73
21
24
29
1
1
1.1
17
20
25
03
04
05
4
6
8
4
6
8
12
16
18
4
5
5
⎯
⎯
⎯
6
7
7
0.3
0.3
0.3
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
16
20
22
6
6
6
⎯
⎯
⎯
8
9
9
⎯
⎯
⎯
00
01
02
10
12
15
20
22
26
5
5
5
⎯
⎯
⎯
7
7
7
0.3
0.3
0.3
24
26
28
6
6
6
⎯
⎯
⎯
9
9
9
0.3
0.3
0.3
26
28
32
7
7
8
⎯
⎯
⎯
11
11
12
⎯
⎯
⎯
⎯
⎯
⎯
22
10
5
03
04
05
17
20
25
28
32
37
5
6
6
⎯
⎯
⎯
7
8
8
0.3
0.3
0.3
30
35
42
6
7
8
⎯
⎯
⎯
9
10
11
0.3
0.3
0.6
35
40
47
8
9
10
⎯
⎯
⎯
12
14
15
⎯
⎯
⎯
26
28
15
20
6
7
0.6
0.6
0.6
0.3
0.3
40
47
52
10
12
12
⎯
⎯
⎯
16
18
18
⎯
⎯
⎯
⎯
⎯
⎯
34
20
8
06
07
08
30
35
40
42
47
52
6
6
6
⎯
⎯
⎯
8
8
9
0.3
0.3
0.3
47
52
60
8
8
9
⎯
⎯
⎯
11
12
13
0.6
0.6
0.6
52
62
68
10
12
13
⎯
⎯
⎯
16
18
19
29
34
36
25
30
30
7
8
9
0.6
1
1
0.3
0.3
0.6
60
68
78
14
15
17
⎯
⎯
22
21
24
26
38
44
49
25
30
30
9
10
12
1
1
1
0.3
0.3
0.6
70
80
90
18
20
23
24
27
30
28
32
36
52
59
65
20
25
30
12
14
15
1
1.1
1.1
0.6
0.6
0.6
85
100
110
34
39
42
1.1
1.1
1.5
30
35
40
06
07
08
09
10
11
45
50
55
60
65
70
7
7
7
⎯
⎯
⎯
10
10
10
0.3
0.3
0.3
65
70
78
9
9
10
⎯
⎯
⎯
14
14
16
0.6
0.6
0.6
73
78
90
13
13
16
⎯
⎯
21
20
22
25
37
39
45
35
40
45
9
9
10
1
1
1
0.6
0.6
0.6
85
95
105
18
20
23
24
27
30
28
31
35
52
58
64
35
40
45
12
14
15
1
1.1
1.1
0.6
0.6
0.6
100
110
120
25
27
29
34
36
39
39
43
48
72
78
87
35
40
45
17
18
20
1.1
1.5
1.5
0.6
0.6
0.6
120
135
150
45
51
58
2
2
2.1
45
50
55
09
10
11
12
13
14
60
65
70
75
80
85
7
7
7
⎯
⎯
⎯
10
10
10
0.3
0.3
0.3
85
90
95
11
11
11
⎯
⎯
⎯
17
18
18
1
1
1
95
100
105
16
16
16
21
21
21
26
27
27
46
47
47
50
55
55
10
10
10
1
1
1
0.6
0.6
1
110
115
125
23
23
25
30
30
34
35
36
40
64
65
72
50
55
55
15
15
16
1.1
1.1
1.1
0.6
0.6
1
130
140
150
32
34
36
42
45
48
51
56
60
93
101
107
50
50
55
21
23
24
1.5
2
2
0.6
1
1
160
170
180
60
63
67
2.1
2.1
3
60
65
70
12
13
14
15
16
17
75
80
85
90
95
100
7
7
7
⎯
⎯
⎯
10
10
10
0.3
0.3
0.3
100
105
110
11
11
11
⎯
⎯
⎯
19
19
19
1
1
1
110
115
125
16
16
18
21
21
24
27
28
31
47
48
55
60
65
70
10
10
12
1
1
1
1
1
1
135
140
150
27
27
29
36
36
39
44
44
49
79
79
87
60
65
70
18
18
19
1.5
1.5
1.5
1
1
1
160
170
180
38
41
42
51
54
58
65
68
72
115
120
128
60
65
65
26
27
29
2
2.1
2.1
1
1
1.1
190
200
215
69
73
78
3
3
4
75
80
85
15
16
17
18
20
22
90
100
110
105
120
130
7
9
9
⎯
⎯
⎯
10
14
14
0.3
0.6
0.6
120
135
145
14
16
16
⎯
21
21
22
25
25
1
1
1
135
150
160
20
23
23
27
30
30
35
38
38
62
67
67
75
85
95
14
15
15
1.1
1.1
1.1
1
1
1
155
170
190
29
32
36
39
42
48
50
55
63
88
97
110
75
85
95
19
21
24
1.5
1.5
2
1
1
1
190
210
230
45
50
54
60
67
73
77
85
95
135
150
166
70
80
90
30
33
37
2.1
3
3
1.1
1.1
1.1
225
250
270
82
90
95
4
4
5
90
100
110
18
20
22
24
26
28
120
130
140
140
150
160
9
9
9
⎯
⎯
⎯
14
14
14
0.6
0.6
0.6
155
170
180
16
18
18
21
24
24
25
30
31
1
1
1
170
190
200
23
27
27
30
36
36
39
45
46
68
80
81
100
110
120
15
18
18
1.1
1.5
1.5
1.1
1.1
1.1
210
225
240
41
42
45
54
58
60
70
75
80
123
130
140
100
110
120
27
30
31
2.1
2.1
2.1
1.1
1.1
1.1
250
270
280
58
63
63
78
85
85
102
110
112
177
192
196
95
100
110
40
42
44
4
4
4
1.5
2
2
300
320
340
109
115
122
5
5
5
120
130
140
24
26
28
30
32
34
150
160
170
170
180
190
9
9
9
⎯
⎯
⎯
14
14
14
0.6
0.6
0.6
190
200
215
18
18
20
24
24
27
31
31
34
1
1
1.1
215
225
240
29
29
32
39
39
42
50
51
55
89
90
97
130
140
150
20
20
21
1.5
1.5
1.5
1.1
1.1
1.1
250
270
280
45
50
50
60
67
67
80
87
87
140
153
153
130
140
150
31
33
33
2.1
3
3
1.1
1.1
1.1
300
320
340
67
73
78
90
95
103
120
130
135
209
226
236
120
130
135
46
50
50
4
5
5
2
2
2.1
360
380
400
125
132
140
6
6
6
150
160
170
30
32
34
36
38
40
180
190
200
200
215
225
9
11
11
⎯
⎯
⎯
14
17
17
0.6
1
1
225
240
250
20
23
23
27
30
30
34
37
37
1.1
1.1
1.1
250
270
280
32
36
36
42
48
48
56
62
62
98
109
109
150
160
170
21
24
24
1.5
2
2
2
2
2
300
320
340
54
58
63
73
78
85
95
105
110
165
183
192
150
160
170
37
40
42
3
4
4
2
2
2
360
380
400
82
85
90
109
115
122
140
150
155
245
140
52
⎯
⎯
5
5
5
3
⎯
⎯
420
440
460
145
150
155
6
6
7.5
180
190
200
36
38
40
44
48
52
220
240
260
250
270
290
14
14
14
⎯
⎯
⎯
22
22
22
1
1
1
270
300
320
23
27
27
30
36
36
37
45
45
1.1
1.5
1.5
300
340
360
36
45
45
48
60
60
63
78
79
110
190
24
⎯
⎯
2
2.1
2.1
2
⎯
⎯
360
380
420
63
63
73
85
85
95
112
112
130
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
4
5
⎯
⎯
⎯
420
440
480
90
90
100
122
122
132
160
160
175
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
6
6
⎯
⎯
⎯
500
540
580
170
180
190
7.5
7.5
9.5
220
240
260
44
48
52
56
60
64
280
300
320
310
340
360
14
18
18
⎯
24
24
22
30
30
1
1
1
350
380
400
32
36
36
42
48
48
53
62
63
1.5
2
2
380
420
440
45
54
54
60
73
73
80
95
95
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
2.1
3
3
⎯
⎯
⎯
440
480
500
73
82
82
95
109
109
130
140
140
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
5
5
⎯
⎯
⎯
520
540
580
109
109
118
145
145
155
190
190
205
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
6
7.5
⎯
⎯
⎯
620
670
710
206
224
236
9.5
9.5
9.5
280
300
320
56
60
64
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Remarks 1. Dimension Series 22, 23, and 24 are double direction bearings.
Remarks 2. The maximum permissible outside diameter of shaft and central washers and minimum permissible bore diameter of
housing washers are omitted here. (Refer to the bearing tables for Thrust Bearings).
A 46
A024-057E.indd 46-47
A 47
11/20/13 4:50:31 PM
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
Table 7. 3 Boundary Dimensions of
Thrust Bearings (Flat Seats) ⎯ 2 ⎯
Units: mm
511
512
Bore Number
Spherical Thrust
Roller Brgs.
d
513
522
Diameter Series 1
Dimension Series
Dimension Series
70
90
71
10
r (min.)
D
91
72
r (min.)
92
12
Diameter Series 4
Dimension Series
22
D
22
73
Central Washer
T
T
Diameter Series 3
Dimension Series
r (min.) r1 (min.)
93
13
23
74
Central Washer
r (min.) r1 (min.)
94
B
14
Dimension
Series
24
D
24
95
Central Washer
T
d2
Diameter Series 5
Dimension Series
23
D
T
Thrust Ball
Brgs.
Spherical Thrust
Roller Brgs.
524
294
Diameter Series 2
11
D
514
293
292
Diameter Series 0
523
r (min.) r1 (min.)
T
d2
B
r (min.)
D
d
Bore Number
Thrust Ball Brgs.
T
d2
B
68
72
76
340
360
380
380
400
420
18
18
18
24
24
24
30
30
30
1
1
1
420
440
460
36
36
36
48
48
48
64
65
65
2
2
2
460
500
520
54
63
63
073
085
085
96
110
112
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
3
4
4
⎯
⎯
⎯
540
560
600
90
90
100
122
122
132
160
160
175
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
5
6
⎯
⎯
⎯
620
640
670
125
125
132
170
170
175
220
220
224
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
7.5
7.5
7.5
⎯
⎯
⎯
750
780
820
243
250
265
12
12
12
340
360
380
68
72
76
80
84
88
400
420
440
440
460
480
18
18
18
24
24
24
30
30
30
1
1
1
480
500
540
36
36
45
48
48
60
65
65
80
2
2
2.1
540
580
600
63
73
73
085
095
095
112
130
130
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
4
5
5
⎯
⎯
⎯
620
650
680
100
103
109
132
140
145
175
180
190
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
6
6
⎯
⎯
⎯
710
730
780
140
140
155
185
185
206
243
243
265
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
7.5
7.5
9.5
⎯
⎯
⎯
850
900
950
272
290
308
12
15
15
400
420
440
80
84
88
92
96
/500
460
480
500
500
520
540
18
18
18
24
24
24
30
30
30
1
1
1
560
580
600
45
45
45
60
60
60
80
80
80
2.1
2.1
2.1
620
650
670
73
78
78
095
103
103
130
135
135
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
5
5
⎯
⎯
⎯
710
730
750
112
112
112
150
150
150
195
195
195
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
6
6
⎯
⎯
⎯
800
850
870
155
165
165
206
224
224
265
290
290
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
9.5
9.5
9.5
⎯
⎯
⎯
980
1000
1060
315
315
335
15
15
15
460
480
500
92
96
/500
/530
/560
/600
530
560
600
580
610
650
23
23
23
30
30
30
38
38
38
1.1
1.1
1.1
640
670
710
50
50
50
67
67
67
85
85
85
3
3
3
710
750
800
82
85
90
109
115
122
140
150
160
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
5
5
5
⎯
⎯
⎯
800
850
900
122
132
136
160
175
180
212
224
236
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
7.5
7.5
7.5
⎯
⎯
⎯
920
980
1030
175
190
195
236
250
258
308
335
335
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
9.5
12
12
⎯
⎯
⎯
1090
1150
1220
335
355
375
15
15
15
530
560
600
/530
/560
/600
/630
/670
/710
630
670
710
680
730
780
23
27
32
30
36
42
38
45
53
1.1
1.5
1.5
750
800
850
54
58
63
73
78
85
95
105
112
3
4
4
850
900
950
100
103
109
132
140
145
175
180
190
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
6
6
⎯
⎯
⎯
950
1000
1060
145
150
160
190
200
212
250
258
272
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
9.5
9.5
9.5
⎯
⎯
⎯
1090
1150
1220
206
218
230
280
290
308
365
375
400
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
12
15
15
⎯
⎯
⎯
1280
1320
1400
388
388
412
15
15
15
630
670
710
/630
/670
/710
/750
/800
/850
750
800
850
820
870
920
32
32
32
42
42
42
53
53
53
1.5
1.5
1.5
900
950
1000
67
67
67
90
90
90
120
120
120
4
4
4
1000
1060
1120
112
118
122
150
155
160
195
205
212
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
6
7.5
7.5
⎯
⎯
⎯
1120
1180
1250
165
170
180
224
230
243
290
300
315
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
9.5
9.5
12
⎯
⎯
⎯
1280
1360
1440
236
250
⎯
315
335
354
412
438
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
15
15
15
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
750
800
850
/750
/800
/850
/900
/950
/1000
900
950
1000
980
1030
1090
36
36
41
48
48
54
63
63
70
2
2
2.1
1060
1120
1180
73
78
82
95
103
109
130
135
140
5
5
5
1180
1250
1320
125
136
145
170
180
190
220
236
250
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
7.5
7.5
9.5
⎯
⎯
⎯
1320
1400
1460
190
200
⎯
250
272
276
335
355
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
12
12
12
⎯
⎯
⎯
1520
1600
1670
⎯
⎯
⎯
372
390
402
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
15
15
15
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
900
950
1000
/900
/950
/1000
/1060
/1120
/1180
1060
1120
1180
1150
1220
1280
41
45
45
54
60
60
70
80
80
2.1
2.1
2.1
1250
1320
1400
85
90
100
115
122
132
150
160
175
5
5
6
1400
1460
1520
155
⎯
⎯
206
206
206
265
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
9.5
9.5
9.5
⎯
⎯
⎯
1540
1630
1710
⎯
⎯
⎯
288
306
318
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
15
15
15
⎯
⎯
⎯
1770
1860
1950
⎯
⎯
⎯
426
444
462
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
15
15
19
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1060
1120
1180
/1060
/1120
/1180
/1250
/1320
/1400
1250
1320
1400
1360
1440
1520
50
67
⎯
⎯
85
95
95
3
3
3
1460
1540
1630
⎯
⎯
⎯
⎯
⎯
⎯
175
175
180
6
6
6
1610
1700
1790
⎯
⎯
⎯
216
228
234
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
9.5
9.5
12
⎯
⎯
⎯
1800
1900
2000
⎯
⎯
⎯
330
348
360
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
19
19
19
⎯
⎯
⎯
2050
2160
2280
⎯
⎯
⎯
480
505
530
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
19
19
19
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1250
1320
1400
/1250
/1320
/1400
/1500
/1600
/1700
1500
1600
1700
1630
1730
1840
⎯
⎯
⎯
⎯
⎯
⎯
105
105
112
4
4
4
1750
1850
1970
⎯
⎯
⎯
⎯
⎯
⎯
195
195
212
6
6
7.5
1920
2040
2160
⎯
⎯
⎯
252
264
276
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
12
15
15
⎯
⎯
⎯
2140
2270
⎯
⎯
⎯
⎯
384
402
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
19
19
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1500
1600
1700
/1500
/1600
/1700
/1800
/1900
/2000
1800
1900
2000
1950
2060
2160
⎯
⎯
⎯
⎯
⎯
⎯
120
130
130
4
5
5
2080
2180
2300
⎯
⎯
⎯
⎯
⎯
⎯
220
220
236
7.5
7.5
7.5
2280
⎯
⎯
⎯
⎯
⎯
288
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
15
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1800
1900
2000
/1800
/1900
/2000
/2120
/2240
/2360
/2500
2120
2240
2360
2500
2300
2430
2550
2700
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
140
150
150
160
5
5
5
5
2430
2570
2700
2850
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
243
258
265
272
7.5
9.5
9.5
9.5
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
2120
2240
2360
2500
/2120
/2240
/2360
/2500
⎯
⎯
Remarks 1. Dimension Series 22, 23, and 24 are double direction bearings.
Remarks 2. The maximum permissible outside diameter of shaft and central washers and minimum permissible bore diameter of
housing washers are omitted here. (Refer to the bearings tables for Thrust Bearings).
A 48
A024-057E.indd 48-49
A 49
11/20/13 4:50:33 PM
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
Table 7. 4 Dimensions of Snap Ring Grooves and Locating Snap Rings ⎯ (1)
Bearings of Dimension Series 18 and 19
a b
rN
f
Housing
Side Cover
r0
g
(Geometry of locating snap ring fitted in groove)
e
rN
jD 2
jD x
jD 1
Units: mm
Applicable Bearings
Snap Ring Groove
d
D
18
19
⎯
⎯
⎯
⎯
20
22
25
⎯
28
30
32
⎯
35
40
⎯
45
⎯
50
⎯
55
60
⎯
65
70
75
80
⎯
85
90
95
100
105
110
⎯
120
130
140
⎯
150
160
10
12
15
17
⎯
⎯
20
22
⎯
25
⎯
28
30
32
35
⎯
40
⎯
45
50
⎯
55
60
65
⎯
70
75
80
⎯
85
90
95
100
105
110
120
⎯
130
140
⎯
22
24
28
30
32
34
37
39
40
42
44
45
47
52
55
58
62
65
68
72
78
80
85
90
95
100
105
110
115
120
125
130
140
145
150
165
175
180
190
200
Snap Ring Groove
Width
a
Bearing Dimension Series
D1
Dimension Series
18
max.
min.
max.
20.8
22.8
26.7
28.7
30.7
32.7
35.7
37.7
38.7
40.7
42.7
43.7
45.7
50.7
53.7
56.7
60.7
63.7
66.7
70.7
76.2
77.9
82.9
87.9
92.9
97.9
102.6
107.6
112.6
117.6
122.6
127.6
137.6
142.6
147.6
161.8
171.8
176.8
186.8
196.8
20.5
22.5
26.4
28.4
30.4
32.4
35.4
37.4
38.4
40.4
42.4
43.4
45.4
50.4
53.4
56.4
60.3
63.3
66.3
70.3
75.8
77.5
82.5
87.5
92.5
97.5
102.1
107.1
112.1
117.1
122.1
127.1
137.1
142.1
147.1
161.3
171.3
176.3
186.3
196.3
⎯
⎯
⎯
⎯
1.3
1.3
1.3
⎯
1.3
1.3
1.3
⎯
1.3
1.3
⎯
1.3
⎯
1.3
⎯
1.7
1.7
⎯
1.7
1.7
1.7
1.7
⎯
2.1
2.1
2.1
2.1
2.1
2.5
⎯
2.5
3.3
3.3
⎯
3.3
3.3
b
19
min.
⎯
⎯
⎯
⎯
1.15
1.15
1.15
⎯
1.15
1.15
1.15
⎯
1.15
1.15
⎯
1.15
⎯
1.15
⎯
1.55
1.55
⎯
1.55
1.55
1.55
1.55
⎯
1.9
1.9
1.9
1.9
1.9
2.3
⎯
2.3
3.1
3.1
⎯
3.1
3.1
Radius of
Bottom
Corners
r0
max.
min.
max.
min.
1.05
1.05
1.3
1.3
⎯
⎯
1.7
1.7
⎯
1.7
⎯
1.7
1.7
1.7
1.7
⎯
1.7
⎯
1.7
1.7
⎯
2.1
2.1
2.1
⎯
2.5
2.5
2.5
⎯
3.3
3.3
3.3
3.3
3.3
3.3
3.7
⎯
3.7
3.7
⎯
0.9
0.9
1.15
1.15
⎯
⎯
1.55
1.55
⎯
1.55
⎯
1.55
1.55
1.55
1.55
⎯
1.55
⎯
1.55
1.55
⎯
1.9
1.9
1.9
⎯
2.3
2.3
2.3
⎯
3.1
3.1
3.1
3.1
3.1
3.1
3.5
⎯
3.5
3.5
⎯
1.05
1.05
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
0.8
0.8
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
0.95
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
Locating Snap
Ring Number
max.
0.2
0.2
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
Remarks The minimum permissible chamfer dimensions rN on the snap-ring-groove side of the outer rings are as follows:
Dimension series 18 : For outside diameters of 78mm and less, use 0.3mm chamfer.
For all others exceeding 78mm, use 0.5mm chamfer.
Dimension series 19 : For outside diameters of 24mm and less, use 0.2mm chamfer.
For 47mm and less, use 0.3mm chamfer.
A 50
For all others exceeding 47mm, use 0.5mm chamfer (However, for an outside diameter of
68 mm, use a 0.3 mm chamfer, which is not compliant with ISO 15).
A024-057E.indd 50-51
Side Cover
Locating Snap Ring
Snap Ring Groove Position
Snap Ring Groove
Diameter
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
1022
1024
1028
1030
1032
1034
1037
1039
1040
1042
1044
1045
1047
1052
1055
1058
1062
1065
1068
1072
1078
1080
1085
1090
1095
1100
1105
1110
1115
1120
1125
1130
1140
1145
1150
1165
1175
1180
1190
1200
Cross Sectional
Height
Thickness
e
f
max.
min.
max.
min.
2.0
2.0
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
3.25
3.25
3.25
3.25
3.25
3.25
4.04
4.04
4.04
4.04
4.04
4.04
4.04
4.04
4.04
4.85
4.85
4.85
4.85
4.85
1.85
1.85
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
1.9
3.1
3.1
3.1
3.1
3.1
3.1
3.89
3.89
3.89
3.89
3.89
3.89
3.89
3.89
3.89
4.7
4.7
4.7
4.7
4.7
0.7
0.7
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
0.85
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.7
1.7
1.7
1.7
1.7
1.7
1.7
1.7
0.6
0.6
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
Geometry of snap ring
fitted in groove
(Reference)
Stepped Bore
Diameter
(Reference)
Slit
Width
g
Snap Ring
Outside
Diameter D2
approx.
max.
min.
24.8
26.8
30.8
32.8
34.8
36.8
39.8
41.8
42.8
44.8
46.8
47.8
49.8
54.8
57.8
60.8
64.8
67.8
70.8
74.8
82.7
84.4
89.4
94.4
99.4
104.4
110.7
115.7
120.7
125.7
130.7
135.7
145.7
150.7
155.7
171.5
181.5
186.5
196.5
206.5
25.5
27.5
31.5
33.5
35.5
37.5
40.5
42.5
43.5
45.5
47.5
48.5
50.5
55.5
58.5
61.5
65.5
68.5
72
76
84
86
91
96
101
106
112
117
122
127
132
137
147
152
157
173
183
188
198
208
2
2
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
5
5
5
7
7
7
7
7
7
7
10
10
10
10
DX
A 51
11/20/13 4:50:35 PM
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
Table 7. 4 Dimensions of Snap Ring Grooves and Locating Snap Rings ⎯ (2)
Bearing of Diameter Series 0, 2, 3, and 4
f
Side Cover
a b
rN
Housing
g
(Geometry of locating snap ring fitted in groove)
r0
e
rN
jD 2
jD x
jD 1
Units: mm
Applicable Bearings
Snap Ring Groove
Snap Ring Groove
Diameter
d
D
Diameter Series
0
2
3
4
10
12
⎯
15
17
⎯
⎯
20
22
25
⎯
28
30
⎯
32
35
⎯
40
⎯
45
50
⎯
55
60
65
70
75
⎯
80
85
90
95
100
105
110
120
⎯
130
⎯
⎯
10
12
15
⎯
17
⎯
⎯
20
22
25
⎯
⎯
28
30
32
⎯
35
⎯
40
45
50
⎯
55
60
⎯
65
70
75
80
⎯
85
90
95
100
105
110
⎯
⎯
9
⎯
10
12
⎯
15
⎯
17
⎯
20
⎯
22
⎯
25
⎯
28
30
32
35
⎯
40
⎯
45
50
⎯
55
⎯
60
65
⎯
70
75
80
85
90
95
⎯
⎯
8
9
⎯
10
⎯
12
⎯
⎯
⎯
15
⎯
⎯
⎯
17
⎯
⎯
20
⎯
25
⎯
30
⎯
35
40
⎯
45
⎯
50
55
⎯
60
65
⎯
70
75
80
26
28
30
32
35
37
40
42
44
47
50
52
55
56
58
62
65
68
72
75
80
85
90
95
100
110
115
120
125
130
140
145
150
160
170
180
190
200
Snap Ring Groove Radius
of
Width
Bottom
Corners
a
Bearing Diameter Series
D1
0
Side Cover
Locating Snap Ring
Snap Ring Groove Position
b
2, 3, 4
Locating Snap
Ring Number
Cross Sectional
Height
Thickness
e
f
r0
max.
min.
max.
min.
max.
min.
max.
min.
max.
24.5
26.5
28.17
30.15
33.17
34.77
38.1
39.75
41.75
44.6
47.6
49.73
52.6
53.6
55.6
59.61
62.6
64.82
68.81
71.83
76.81
81.81
86.79
91.82
96.8
106.81
111.81
115.21
120.22
125.22
135.23
140.23
145.24
155.22
163.65
173.66
183.64
193.65
24.25
26.25
27.91
29.9
32.92
34.52
37.85
39.5
41.5
44.35
47.35
49.48
52.35
53.35
55.35
59.11
62.1
64.31
68.3
71.32
76.3
81.31
86.28
91.31
96.29
106.3
111.3
114.71
119.71
124.71
134.72
139.73
144.73
154.71
163.14
173.15
183.13
193.14
1.35
1.35
⎯
2.06
2.06
⎯
⎯
2.06
2.06
2.06
⎯
2.06
2.08
⎯
2.08
2.08
⎯
2.49
⎯
2.49
2.49
⎯
2.87
2.87
2.87
2.87
2.87
⎯
2.87
2.87
3.71
3.71
3.71
3.71
3.71
3.71
⎯
5.69
1.19
1.19
⎯
1.9
1.9
⎯
⎯
1.9
1.9
1.9
⎯
1.9
1.88
⎯
1.88
1.88
⎯
2.29
⎯
2.29
2.29
⎯
2.67
2.67
2.67
2.67
2.67
⎯
2.67
2.67
3.45
3.45
3.45
3.45
3.45
3.45
⎯
5.44
⎯
⎯
2.06
2.06
2.06
2.06
2.06
2.06
⎯
2.46
2.46
2.46
⎯
2.46
2.46
3.28
3.28
3.28
3.28
3.28
3.28
3.28
3.28
⎯
3.28
3.28
⎯
4.06
4.06
4.06
4.9
⎯
4.9
4.9
5.69
5.69
5.69
5.69
⎯
⎯
1.9
1.9
1.9
1.9
1.9
1.9
⎯
2.31
2.31
2.31
⎯
2.31
2.31
3.07
3.07
3.07
3.07
3.07
3.07
3.07
3.07
⎯
3.07
3.07
⎯
3.86
3.86
3.86
4.65
⎯
4.65
4.65
5.44
5.44
5.44
5.44
1.17
1.17
1.65
1.65
1.65
1.65
1.65
1.65
1.65
1.65
1.65
1.65
1.65
1.65
1.65
2.2
2.2
2.2
2.2
2.2
2.2
2.2
3
3
3
3
3
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.8
3.8
3.8
3.8
0.87
0.87
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.9
1.9
1.9
1.9
1.9
1.9
1.9
2.7
2.7
2.7
2.7
2.7
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.5
3.5
3.5
3.5
0.2
0.2
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
026 (1)
028 (1)
030
032
035
037
040
042
044
047
050
052
055
056
058
062
065
068
072
075
080
085
090
095
100
110
115
120
125
130
140
145
150
160
170
180
190
200
max.
min.
max.
2.06
2.06
3.25
3.25
3.25
3.25
3.25
3.25
3.25
4.04
4.04
4.04
4.04
4.04
4.04
4.04
4.04
4.85
4.85
4.85
4.85
4.85
4.85
4.85
4.85
4.85
4.85
7.21
7.21
7.21
7.21
7.21
7.21
7.21
9.6
9.6
9.6
9.6
1.91
1.91
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.89
3.89
3.89
3.89
3.89
3.89
3.89
3.89
4.7
4.7
4.7
4.7
4.7
4.7
4.7
4.7
4.7
4.7
7.06
7.06
7.06
7.06
7.06
7.06
7.06
9.45
9.45
9.45
9.45
0.84
0.84
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.7
1.7
1.7
1.7
1.7
1.7
1.7
2.46
2.46
2.46
2.46
2.46
2.82
2.82
2.82
2.82
2.82
2.82
2.82
3.1
3.1
3.1
3.1
min.
0.74
0.74
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.6
1.6
1.6
1.6
1.6
1.6
1.6
2.36
2.36
2.36
2.36
2.36
2.72
2.72
2.72
2.72
2.72
2.72
2.72
3
3
3
3
Geometry of snap ring
fitted in groove
(Reference)
Slit
Width
g
Snap Ring
Outside
Diameter D2
approx.
max.
03
03
03
03
03
03
03
03
03
04
04
04
04
04
04
04
04
05
05
05
05
05
05
05
05
05
05
07
07
07
07
07
07
07
10
10
10
10
28.7
30.7
34.7
36.7
39.7
41.3
44.6
46.3
48.3
52.7
55.7
57.9
60.7
61.7
63.7
67.7
70.7
74.6
78.6
81.6
86.6
91.6
96.5
101.6
106.5
116.6
121.6
129.7
134.7
139.7
149.7
154.7
159.7
169.7
182.9
192.9
202.9
212.9
Stepped Bore
Diameter
(Reference)
DX
min.
29.4
31.4
35.5
37.5
40.5
42
45.5
47
49
53.5
56.5
58.5
61.5
62.5
64.5
68.5
71.5
76
80
83
88
93
98
103
108
118
123
131.5
136.5
141.5
152
157
162
172
185
195
205
215
Note (1) The locating snap rings and snap ring grooves of these bearings are not specified by ISO.
Remarks 1. The dimensions of these snap ring grooves are not applicable to bearings of dimension series 00, 82, and 83.
2. The minimum permissible chamfer dimension rN on the snap-ring side of outer rings is 0.5mm. However, for
bearings of diameter series 0 having outside diameters 35mm and below, it is 0.3mm.
A 52
A024-057E.indd 52-53
A 53
11/20/13 4:50:36 PM
BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
7.2 Formulation of Bearing Numbers
Table 7. 5 Bearing Series Symbols
(Example 4) NU 3 1 8 M CM
Bearing numbers are alphanumeric combinations
that indicate the bearing type, boundary dimensions,
dimensional and running accuracies, internal clearance,
and other related specifications. They consist of
basic numbers and supplementary symbols. The
boundary dimensions of commonly used bearings
mostly conform to the organizational concept of ISO,
and the bearing numbers of these standard bearings
are specified by JIS B 1513 (Bearing Numbers for
Rolling Bearings). Due to a need for more detailed
classification, NSK uses auxiliary symbols other than
those specified by JIS.
Bearing numbers consist of a basic number and
supplementary symbols. The basic number indicates
the bearing series(type) and the width and diameter
series as shown in Table 7.5. Basic numbers,
supplementary symbols, and the meanings of common
numbers and symbols are listed in Table 7.6 (Pages
A56 and A57). The contact angle symbols and other
supplementary designations are shown in successive
columns from left to right in Table 7.6. For reference,
some examples of bearing designations are shown
here:
Radial Clearance for
Electric-Motor Bearings CM
Machined Brass Cage
Bearing Bore 90mm
Diameter Series 3
}
(Example 5) NN 3 0 1 7 K CC1 P4
Accuracy of ISO Class 4
Radial Clearance in NonInterchangeable Cylindrical
Roller Bearings CC1
Tapered Bore (Taper 1:12)
Bearing Bore 85mm
Diameter Series 0
Width Series 3
NN Type Cylindrical
Roller Bearing
(Example 6) HR 3 0 2 0 7 J
Single-Row
Angular Contact
Ball Bearings
Self-Aligning
Ball Bearings
Width Series 0
Tapered Roller Bearing
High Capacity Bearing
(Example 7) 2 4 0 /1000 M K30 E4 C3
Radial Clearance C3
Outer Ring with Oil Groove
and Oil Holes
Tapered Bore (Taper 1:30)
Axial Clearance C3
Back-to-Back Arrangement
Machined Brass Cage
Contact Angle 30
o
Bearing Bore 1000mm
Diameter Series 0
Bearing Bore 100mm
Diameter Series 2
Single-Row
Cylindrical
Roller
Bearings
Type
Symbols
68
6
(1)
8
69
6
(1)
9
60
6
(1)
0
62
6
(0)
2
63
6
(0)
3
79
7
(1)
9
70
7
(1)
0
72
7
(0)
2
73
7
(0)
3
Width Diameter
Symbols Symbols
12
1
(0)
2
13
1
(0)
3
22
(1)
2
2
23
(1)
2
3
Dimension Symbols
Bearing Type
Double-Row
Cylindrical
Roller Bearings
Needle Roller
Bearings
Tapered Roller
Bearings
Bearing
Series
Symbols
Width
Type
Symbols Diameter
Symbols
or
Height Symbols
Symbols
NNU49
NNU
4
9
NN30U
NNU
3
0
NA48
NA
4
8
NA49
NA
4
9
NA59
NA
5
9
NA69
NA
6
9
329
3
2
9
320
3
2
0
330
3
3
0
331
3
3
1
302
3
0
2
322
3
2
2
332
3
3
2
NU10
NU
1
0
NU20
NU
(0)
2
NU22
NU
2
2
303
3
0
3
NU30
NU
(0)
3
323
3
2
3
NU23
NU
2
3
NU40
NU
(0)
4
230
2
3
0
NJ20
NJ
(0)
2
231
2
3
1
222
2
2
2
Spherical
Roller
Bearings
NJ22
NJ
2
2
NJ30
NJ
(0)
3
232
2
3
2
NJ23
NJ
2
3
213 (1)
2
0
3
223
2
2
3
NJ40
NJ
(0)
4
NUP20
NUP
(0)
2
NUP22
NUP
2
2
511
5
1
1
NUP30
NUP
(0)
3
512
5
1
2
NUP23
NUP
2
3
513
5
1
3
514
5
1
4
NUP40
NUP
(0)
4
Thrust Ball
Bearings with
Flat Seats
Width Series 4
N10
N
1
0
522
5
2
2
Spherical Roller Bearing
N20
N
(0)
2
523
5
2
3
N30
N
(0)
3
524
5
2
4
N40
N
(0)
4
Bearing Bore 75mm
NF2
NF
(0)
2
292
2
9
2
Bearing Bore 30mm
NF
(0)
3
2
9
3
Diameter Series 2
NF3
293
Diameter Series 2
294
2
9
4
Height Series 1
Self-Aligning Ball Bearing
Thrust Ball Bearing
Single-Row Angular Contact Ball
Bearing
(Example 3) 1 2 0 6 K +H206X
Adapter with 25mm Bore
Tapered Bore (Taper 1:12)
A024-057E.indd 54-55
Single-Row
Deep Groove
Ball Bearings
Small Diameter of Cup
Raceway and Contact Angle
Conform to ISO
Bearing Bore 35mm
Diameter Series 2
(Example 2) 7 2 2 0 A DB C3
A 54
Bearing Type
NU Type Cylindrical
Roller Bearing
(Example 1) 6 3 0 8 ZZ C3
Radial Clearance C3
(Internal Clearance Symbol)
Shields on Both Sides
(Shield Symbol)
Bearing Bore 40mm
(Bore Number)
Diameter Series 3 Bearing
Series
Single-Row Deep
Groove Ball Bearing Symbol
Dimension Symbols
Bearing
Series
Symbols
(Example 8) 5 1 2 1 5
NF4
NF
(0)
4
Spherical
Thrust Roller
Bearings
Note (1) Bearing Series Symbol 213 should logically be 203, but customarily it is numbered 213.
Remarks Numbers in ( ) in the column of width symbols are usually omitted from the bearing number.
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BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS
Table 7. 6 Formulation of
Bearing Numbers
Basic Numbers
External Features
Internal Design Symbol
Symbol Meaning Symbol Meaning Symbol Meaning Symbol
68
69
60
:
70
72
73
:
12
13
22
:
NU10
NJ 2
N 3
NN 30
:
NA48
NA49
NA69
:
320
322
323
:
230
222
223
:
511
512
513
:
292
293
294
:
1
SingleRow Deep
Groove Ball
Bearings
Single-Row
Angular
Contact Ball
Bearings
SelfAligning Ball
Bearings
Cylindrical
Roller
Bearings
Needle
Roller
Bearings
Bearing 1mm
Bore
2
2
3
⋅⋅
⋅⋅
⋅⋅
9
3
⋅⋅
⋅⋅
⋅⋅
9
00
100
01
120
02
150
03
170
/22
220
/28
280
/32
320
04(3)
200
05
250
06
⋅⋅
⋅⋅
⋅⋅
88
300
⋅⋅
⋅⋅
⋅⋅
4400
92
4600
96
4800
/500
5000
Thrust Ball
/530
Bearing with
/560
Flat Seats
5300
Tapered
Roller
Bearings
( 2)
Spherical
Roller
Bearings
Thrust
Spherical
Roller
Bearings
⋅⋅
⋅⋅
⋅
5600
⋅⋅
⋅⋅
⋅
/2 360
2 360 00
/2 500
2 500 00
(
)
Angular
Contact Ball
Bearings
A Standard
Contact Angle
of 30°
A5
A
Symbol
g
Internal Design
Differs from
Standard One
J
Smaller Diameter
of Outer Ring
Raceway, Contact
Angle, and Outer
Ring Width of
Tapered Roller
Bearings Conform
to ISO 355
Standard
Contact Angle
of 25°
B
Meaning
Material Symbol
Meaning
Case-Hardened
Steel Used in
Rings, Rolling
Elements
Cage Symbol
Symbol Meaning Symbol Meaning
M
Machined
Brass Cage
W
h
Stainless Steel
Used in Rings,
Rolling Elements
(
)
K
Tapered
Bore of
Inner Ring
(Taper 1:12)
DB
Pressed
Steel Cage
ZZ
ZZS
}
Shields
on Both
Sides
Back-to-Back
Arrangement
Face-toFace
Arrangement
K30 Tapered
Bore of
Inner Ring
(Taper 1:30)
Rubber Seal
on One Side
Only
Synthetic
Resin Cage
V
Rubber
Seals on
Both Sides
Without
Cage
CD
V
EA
E
C4
DT
Tandem
Arrangement
E
Cylindrical Roller
Bearings
D
Contact Angle
about 28°
E
Spherical Thrust
Roller Bearings
Contact
Rubber
Seals on
Both Sides
Notch or
Lubricating
Groove in
Ring
CC2
CC
E4
Lubricating
Groove in
Outside
Surface and
Holes in
Outer Ring
CC5
MC1
MC2
Snap Ring
Groove in
Outer Ring
MC3
NR Snap Ring
MC5
MC4
Groove with
Snap Ring
in Outer
Ring
MC6
Omitted ISO Normal
P6
CN Clearance
Clearance Greater
than CN
Clearance Greater
than C3
Clearance Greater
than C4
ISO Class 6
)
+K
Bearings
with Outer
Ring
Spacers
+L
Bearings
with Inner
Ring
Spacers
AS2 SHELL
ALVANIA
GREASE S2
ENS ENS GREASE
X26 Working
Temperature
Lower than
150 °C
P6X ISO Class 6X
NS7 NS HI-LUBE
+KL Bearings
Clearance Less
than CC2
Clearance Less
than CC
P5
ISO Class 5
P4
ISO Class 4
Clearance Greater
than CC
Clearance Greater
than CC3
Clearance Greater
than CC4
P2
with Both
Inner and
Outer Ring
Spacers
X28 Working
Temperature
Lower than
200 °C
X29 Working
Normal Clearance
Clearance Less than
MC2
Clearance Less than
MC3
(
Bearings
treated for
Dimensional
Stabilization
Temperature
Lower than
250 °C
ISO Class 2
H
PS2 MULTEMP PS
No. 2
Adapter
Designation
AH Withdrawal
(
ABMA( )
Tapered
roller bearing
7
Omitted Class 4
Normal Clearance
PN2 Class 2
Clearance Greater
than MC3
Clearance Greater
than MC4
Clearance Greater
than MC5
)
Sleeve
Designation
(
Spherical
Roller
Bearings
)
HJ
Thrust
Collar
Designation
S11 Dimensional
Stabilizing
Treatment
Working
Temperature
Lower than
200°C
PN3 Class 3
PN0 Class 0
Motors
PN00 Class 00
CT
CM
Clearance in Cylindrical
Roller Bearings for Electric
Motors
of Angular Contact
(Preload
)
Ball Bearing
EL
L
M
H
Symbols and Numbers Conform to JIS(5)
Marked on Bearings
NSK Symbol
NSK Symbol
Partially the
same as
JIS(5)
Same as
JIS(5)
Not Marked
on Bearings
Notes ( ) Bearing Series Symbols conform to Table 7.5.
(2) For basic numbers of tapered roller bearings in ISO's new series, refer to Page B111.
(3) For Bearing Bore Numbers 04 through 96, five times the bore number gives the bore size (mm) (except doubledirection thrust ball bearings).
(4) HR is prefix to bearing series symbols and it is NSK's original prefix.
A024-057E.indd 56-57
Clearance Less
than C2
Clearance Less
than CN
Clearance in Deep Groove
Tapered Roller
Bearings, and others
A 56
Spacer or Sleeve
Grease Symbol
Symbol
CM Ball Bearings for Electric
HR(4) High Capacity
1
C5
CC4
NonContact
Rubber Seal
on One Side
Only
VV Non-
Contact Angle
about 20°
C3
CC3
N
C
Omitted
CC1
CA
Spherical Roller
Bearings
C1
C2
DDU Contact
C
)
Shield
on One
Side
Only
For High Capacity
Bearings
Standard
Contact Angle
of 15°
(
}
Special
Specification
Symbol
Symbol Meaning Symbol Meaning Symbol Meaning (radial clearance) Symbol Meaning Symbol Meaning Symbol Meaning Symbol Meaning
DU Contact
T
Tapered
Roller
Bearings
Omitted Contact Angle
Less than 17°
Z
ZS
Arrangement Internal Clearance Symbol Tolerance Class
Symbol
Preload Symbol
Symbol
Symbol for Design
of Rings
DF
Standard
Contact Angle
of 40°
C
Seals, Shields
Symbol
Symbol
For All Radial Brgs.
Contact Angle
Symbol
For Non-Interchangeable
Cylindrical Roller Brgs.
Bore Number
For Extra-Small
and Miniature Ball Brgs.
Bearing Series
Symbols (1)
Auxiliary Symbols
Extra light Preload
Light Preload
Medium Preload
Heavy Preload
Partially the
NSK Symbol same as JIS(5)/
BAS(6)
Same as JIS(5)
In Principle, Marked on Bearings
Notes
NSK Symbol, Partially the same as JIS(5)
Not Marked on Bearings
( ) JIS : Japanese Industrial Standards.
(6) BAS : The Japan Bearing Industrial Association Standard.
(7) ABMA : The American Bearing Manufacturers Association.
5
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