Bore, outside diameter and width of deep-groove ball bearings in the 68, 69, 60, 62 and 63 series from 10 to 100 mm bore, and how to read the bearing number.
Measure the shaft and the housing bore, then find the bearing that fits. The series sets how heavy the bearing is for the same bore: 68 and 69 are thin-section, 60 is light, 62 medium and 63 heavy – more outside diameter and width means more load capacity. Suffixes such as 2RS (two rubber seals), ZZ (two metal shields) or C3 (more internal clearance) do not change these dimensions.
Dimensions d × D × B in mm
68xx series dimension series 18
68xx series
Bearing
d
D
B
6800
10
19
5
6801
12
21
5
6802
15
24
5
6803
17
26
5
6804
20
32
7
6805
25
37
7
6806
30
42
7
6807
35
47
7
6808
40
52
7
6809
45
58
7
6810
50
65
7
6811
55
72
9
6812
60
78
10
6813
65
85
10
6814
70
90
10
6815
75
95
10
6816
80
100
10
6817
85
110
13
6818
90
115
13
6819
95
120
13
6820
100
125
13
69xx series dimension series 19
69xx series
Bearing
d
D
B
6900
10
22
6
6901
12
24
6
6902
15
28
7
6903
17
30
7
6904
20
37
9
6905
25
42
9
6906
30
47
9
6907
35
55
10
6908
40
62
12
6909
45
68
12
6910
50
72
12
6911
55
80
13
6912
60
85
13
6913
65
90
13
6914
70
100
16
6915
75
105
16
6916
80
110
16
6917
85
120
18
6918
90
125
18
6919
95
130
18
6920
100
140
20
60xx series dimension series 10
60xx series
Bearing
d
D
B
6000
10
26
8
6001
12
28
8
6002
15
32
9
6003
17
35
10
6004
20
42
12
6005
25
47
12
6006
30
55
13
6007
35
62
14
6008
40
68
15
6009
45
75
16
6010
50
80
16
6011
55
90
18
6012
60
95
18
6013
65
100
18
6014
70
110
20
6015
75
115
20
6016
80
125
22
6017
85
130
22
6018
90
140
24
6019
95
145
24
6020
100
150
24
62xx series dimension series 02
62xx series
Bearing
d
D
B
6200
10
30
9
6201
12
32
10
6202
15
35
11
6203
17
40
12
6204
20
47
14
6205
25
52
15
6206
30
62
16
6207
35
72
17
6208
40
80
18
6209
45
85
19
6210
50
90
20
6211
55
100
21
6212
60
110
22
6213
65
120
23
6214
70
125
24
6215
75
130
25
6216
80
140
26
6217
85
150
28
6218
90
160
30
6219
95
170
32
6220
100
180
34
63xx series dimension series 03
63xx series
Bearing
d
D
B
6300
10
35
11
6301
12
37
12
6302
15
42
13
6303
17
47
14
6304
20
52
15
6305
25
62
17
6306
30
72
19
6307
35
80
21
6308
40
90
23
6309
45
100
25
6310
50
110
27
6311
55
120
29
6312
60
130
31
6313
65
140
33
6314
70
150
35
6315
75
160
37
6316
80
170
39
6317
85
180
41
6318
90
190
43
6319
95
200
45
6320
100
215
47
How to read a bearing number
The first digit 6 means a single-row deep-groove ball bearing, the second digit the series (8, 9, 0, 2, 3). The last two digits give the bore: 00 = 10 mm, 01 = 12 mm, 02 = 15 mm, 03 = 17 mm, and from 04 upwards multiply by 5 (6205 → 25 mm, 6310 → 50 mm).
Bore code
Last two digits
00
01
02
03
04
05
06
08
10
20
Bore d mm
10
12
15
17
20
25
30
40
50
100
Load ratings used by the Bearing Life calculator
Load ratings depend on the maker and the internal design, so the chart does not list them for every size. These are the four deep-groove examples built into the Bearing Life calculator (marked * in the tables); for any other bearing take C and C₀ from the maker's catalogue.
Load ratings used by the Bearing Life calculator
Bearing
d × D × B mm
C kN
C₀ kN
6205
25 × 52 × 15
14.8
7.8
6208
40 × 80 × 18
32.5
19
6305
25 × 62 × 17
23.4
11.6
6310
50 × 110 × 27
65
38
Assumptions and sources
Boundary dimensions d × D × B in mm from ISO 15 (dimension series 18, 19, 10, 02 and 03). They are the same for every maker; seals, shields and clearance class do not change them.
Load ratings C and C₀ vary by maker and design. Only the four ratings built into the Bearing Life calculator are listed; they are not invented for other sizes.
Need a size or setting that is not in the chart?The Bearing Life calculator turns C, C₀, your loads and speed into L10 life in hours, with the equivalent load and the static safety factor.
25 mm bore, 52 mm outside diameter and 15 mm wide. 6205-2RS and 6205-ZZ have the same dimensions with rubber seals or metal shields.
What do 2RS, ZZ and C3 mean?
2RS: a rubber contact seal on both sides. ZZ (or 2Z): a metal shield on both sides, lower friction but less protection against water. C3: more internal clearance than normal, used for hot running or tight fits. None of them changes the bore, outside diameter or width.
How do I find a bearing from its dimensions?
Measure bore, outside diameter and width, find the bore in the table, then the series whose outside diameter and width match. Example: 30 × 62 × 16 mm is a 6206; 30 × 72 × 19 mm is a 6306.
What is the difference between 6000, 6200 and 6300 bearings?
The same bore with a growing cross-section: for a 25 mm bore the 6005 is 47 × 12 mm, the 6205 52 × 15 mm and the 6305 62 × 17 mm. The bigger cross-section carries more load and has a longer life, the smaller one saves space and weight.
Why are load ratings not listed for every bearing?
C and C₀ are not part of ISO 15 – each maker publishes its own values, which can differ by 10 – 20 % for the same size. The chart lists only the ratings the Bearing Life calculator uses, so you should take the rating of your actual bearing from its maker.
Tools for this job
What you need to build, measure or check the result.
Deep-groove bearing assortment
Digital caliper