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Miniature bearings refers to metric, outer diameter of less than 9mm; British series, various types of bearings is less than 9.525mm outer diameter! Mainly made of carbon steel, bearing steel, stainless steel, plastics, ceramics, and minimal internal diameter of which can be done 0.6mm, diameter of 1mm more.
Inside diameter (d)
Outer diameter (d)
Width (b)
Basic dynamic load rating Cr (n)
Basic static load rating Cor (n)
Permit number
open
zz
Grease
Lubricant
*1000rpm
682zz
2
5
1.5
2.3
169
50
85
100
MR52zz
5
2
2.5
169
50
85
100
692zz
6
2.3
3
330
99
75
90
MR62zz
6
2.5
2.5
330
99
75
90
MR72zz
7
2.8
3
386
129
63
75
602zz
7
2.8
3.5
386
129
60
71
682Xzz
2.5
6
1.8
2.6
209
74
71
80
692Xzz
7
2.5
3.5
386
129
63
75
MR82X
8
2.5
-
558
180
60
67
602Xzz
8
2.8
4
552
177
60
71
MR63zz
3
6
2
2.5
209
74
71
80
683zz
7
2
3
311
112
63
75
MR83zz
8
2.5
3
395
141
60
67
693zz
8
3
4
558
180
60
67
MR93zz
9
2.5
4
571
189
56
67
603zz
9
3
5
571
189
56
67
623zz
10
4
4
631
219
50
60
633zz
13
5
5
1301
488
40
48
MR74zz
4
7
2
2.5
255
108
60
67
MR84zz
8
2
3
395
141
56
67
684zz
9
2.5
4
641
227
53
63
MR104zz
10
3
4
711
272
48
56
694zz
11
4
4
957
350
48
56
604zz
12
4
4
957
350
48
56
624zz
13
5
5
1301
488
40
48
634zz
16
5
5
1340
523
36
43
MR85zz
5
8
2
2.5
218
90
53
63
MR95zz
9
2.5
3
431
169
50
60
MR105zz
10
3
4
431
169
50
60
MR115zz
11
-
4
716
282
45
53
685zz
11
3
5
716
282
45
53
695zz
13
4
4
1077
432
43
50
605zz
14
5
5
1329
507
40
50
625zz
16
5
5
1729
675
36
43
635zz
19
6
6
2336
896
32
40
MR106zz
6
10
2.5
3
496
218
45
53
MR126zz
12
3
4
716
295
43
50
686zz
13
3.5
5
1082
442
40
50
696zz
15
5
5
1340
523
40
45
606zz
17
6
6
2263
846
38
45
626zz
19
6
6
2336
896
32
40
636zz
22
7
7
3333
1423
30
36
MR117zz
7
11
2.5
3
455
202
43
50
MR137zz
13
3
4
541
276
40
48
687zz
14
3.5
5
1173
513
40
50
697zz
17
5
5
1605
719
36
43
607zz
19
6
6
2336
896
36
43
627zz
22
7
7
3287
1379
30
36
637zz
26
9
6
4563
1983
28
34
MR128zz
8
12
2.5
3.5
543
274
40
48
MR148zz
14
3.5
4
817
386
38
45
688zz
16
4
5
1252
592
36
43
698zz
19
6
6
2237
917
36
43
608z
22
7
7
3293
1379
34
40
628zz
24
8
8
3333
1423
28
34
638zz
28
9
9
4563
1983
28
34
679zz
9
14
3
4.5
919
468
36
42
689zz
17
4
5
1327
668
36
43
699zz
20
6
6
2467
1081
34
40
609zz
24
7
7
3356
1444
32
38
629zz
26
8
8
4575
1983
28
34
639zz
30
10
10
4659
2080
24
30
6700zz
10
15
4
4
855
435
15
17
6800zz
19
5
5
1716
840
37
43
6900zz
22
6
6
2695
1273
34
41
6000zz
26
8
8
4550
1970
30
36
6200zz
30
9
9
5100
2390
24
30
6300zz
35
11
11
8100
3450
22
26
6701zz
12
18
4
4
926
530
13
15
6801zz
21
5
5
1915
1041
33
39
6901zz
24
6
6
2886
1466
31
36
6001zz
28
8
8
5100
2370
28
32
6201zz
32
10
10
6800
3050
22
28
6301zz
37
12
12
9700
4200
990
425
6702zz
15
21
4
4
937
582
11
13
6802zz
24
5
5
2073
1253
28
33
6902zz
28
7
7
4321
2259
26
30
6002zz
32
9
9
5600
2830
24
28
6202zz
35
11
11
7650
3750
20
24
6302zz
42
13
13
11400
5450
17
20
6703zz
17
23
4
4
1000
658
9.5
11
6803zz
26
5
5
2233
1456
26
30
6903zz
30
7
7
4588
2565
23
38
6003zz
35
10
10
6000
3250
22
26
6203zz
40
12
12
9550
4800
17
20
6303zz
47
14
14
13600
6650
15
18