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Miniature Metric Bearings

Metric Miniature Bearings for shaft sizes from 0.6mm to 9mm chrome steel and stainless steel

Our metric series miniature bearings (mini bearings) and small bearings are available open, shielded or sealed, with bore sizes as small as 0.6mm. The smaller sizes are sometimes referred to as instrument bearings or micro bearings. We provide metric sizes for applications as varied as food processing and electric motor bearings. We provide customers with model bearings for remote-controlled cars, thin section bearings for bicycles, and skateboard bearings designed to provide a longer, smoother ride.

Our entire metric series of bearings can be supplied in SAE52100 chrome steel and AISI440C or KS440 (ACD34/X65Cr13) stainless steel and, like most deep groove radial ball bearings, can withstand heavy radial loads and moderate thrust loads in both directions. Certain sizes can be supplied with the TW high-speed synthetic cage and most metric miniature bearings and small bearings can be supplied flanged.

As the premier supplier of miniature bearings in the UK, SMB Bearings can supply to order as hybrid types using steel rings and ceramic balls. Most sizes are available in stainless steel or passivated stainless steel for more corrosive environments (see Technical Data - Bearing Material).

  
     


Bore

O.D.

r.min.		 Open Bearing Shielded Bearing Sealed Bearing
(2RU available)
Max Load kgf


RPM
(x1000)
Width SMB Ref. Width SMB Ref. Width SMB Ref. Dyn Stat
Dimensions in mm.                                       
Max loads: actual loads should be well below figures shown for acceptable bearing life (see Technical)
Max RPM: will be reduced for certain lubricants, closures, loads etc (see Technical)
0.6 2.5 0.05 1 68/0.6         5 1 160
 


1

 3 0.05 1 681         7 2 150
3 0.05 1.5 MR31         7 2 150
4 0.1 1.6 691         13 4 120
 
1.2 4 0.1 1.8 MR41X 2.5 MR41XZZ     10 3 120
 


1.5

 4 0.05 1.2 681X 2 681XZZ     10 3 115
5 0.15 2 691X 2.6 691XZZ     16 5 100
6 0.15 2.5 601X 3 601XZZ     33 10 90
 






2

 4 0.08 1.2 672         10 3 104
5 0.08 1.5 682 2.3 682ZZ     16 5 100
5 0.1 2 MR52 2.5 MR52ZZ     16 5 100
6 0.15     2.3 692ZZW23     33 10 85
6 0.15 2.3 692 3 692ZZ     33 10 85
6 0.15 2.5 MR62 2.5 MR62ZZ     33 10 85
7 0.15 2.5 MR72 3 MR72ZZ     38 13 73
7 0.15 2.8 602 3.5 602ZZ     38 13 68
 

 


2.5

 6 0.08 1.8 682X 2.6 682XZZ     19 6 82
7 0.15 2.5 692X 3.5 692XZZ     37 12 75
8 0.2 2.5 MR82X         55 18 70
8 0.15     2.8 602XZZW28     55 18 70
8 0.15 2.8 602X 4 602XZZ     55 18 70
 

 

 



3

 6 0.1 2 MR63 2.5 MR63ZZ     20 7 80
6 0.1     3 MR63ZZW3     20 7 80
7 0.1 2 683 3 683ZZ     30 10 75
8 0.15 2.5 MR83 3 MR83ZZ     41 16 65
8 0.15 3 693 4 693ZZ     57 18 65
9 0.2 2.5 MR93 4 MR93ZZ     58 19 65
9 0.15 3 603 5 603ZZ     58 19 65
10 0.15 4 623 4 623ZZ 4 623-2RS 62 20 60
13 0.2 5 633 5 633ZZ 5 633-2RS 130 50 45
 
3.5 9 0.1     4 684ZZB35     65 22 62
10 0.15     4 623XZZ     62 20 60
 

 

 


4

 7 0.1 2 MR74 2.5 MR74ZZ     29 9 65
8 0.15 2 MR84 3 MR84ZZ     38 12 65
9 0.15     3.5 684ZZW35     65 22 62
9 0.1 2.5 684 4 684ZZ 4 684-2RS 65 22 62
10 0.2 3 MR104 4 MR104ZZ     60 19 54
11 0.15 4 694 4 694ZZ 4 694-2RS 96 35 54
12 0.2 4 604 4 604ZZ 4 604-2RS 96 35 54
13 0.2 5 624 5 624ZZ 5 624-2RS 130 50 50
16 0.3 5 634 5 634ZZ 5 634-2RS 135 55 41
 

 

 



5

 8 0.1 2 MR85 2.5 MR85ZZ     21 10 63
9 0.15 2.5 MR95 3 MR95ZZ     42 16 60
10 0.15 3 MR105 4 MR105ZZ 4 MR105-2RS 42 16 60
11 0.15     4 MR115ZZ 4 MR115-2RS 73 30 52
11 0.15 3 685 5 685ZZ 5 685-2RS 73 30 52
13 0.2 4 695 4 695ZZ 4 695-2RS 110 42 48
13 0.2     5 695ZZW5 5 695-2RSW5 110 42 48
14 0.2 5 605 5 605ZZ 5 605-2RS 135 50 48
16 0.3 5 625 5 625ZZ 5 625-2RS 175 68 43
19 0.3 6 635 6 635ZZ 6 635-2RS 225 88 38
 






6		 10 0.15 2.5 MR106 3 MR106ZZ 3 MR106-2RS 50 19 52
12 0.2 3 MR126 4 MR126ZZ 4 MR126-2RS 70 30 49
13 0.15     4.5 686ZZW45 4.5 686-2RSW45 105 40 49
13 0.15 3.5 686 5 686ZZ 5 686-2RS 105 40 49
15 0.2 5 696 5 696ZZ 5 696-2RS 135 52 45
16 0.2 5 696A 5 696AZZ 5 696A-2RS 135 52 45
17 0.3 6 606 6 606ZZ 6 606-2RS 218 83 45
19 0.3     5.15 626ZZW51 5.15 626-2RSW51 225 88 40
19 0.3 6 626 6 626ZZ 6 626-2RS 225 88 40
22 0.3 7 636 7 636ZZ 7 636-2RS 335 140 35
 





7		 11 0.15 2.5 MR117 3 MR117ZZ     45 20 50
13 0.2 3 MR137 4 MR137ZZ     50 25 48
14 0.15 3.5 687 5 687ZZ 5 687-2RS 120 50 50
14 0.15 4 687W4             120 50 50
17 0.3 5 697 5 697ZZ 5 697-2RS 155 70 41
19 0.3 6 607 6 607ZZ 6 607-2RS 225 88 41
22 0.3 7 627 7 627ZZ 7 627-2RS 330 135 35
26 0.3 9 637 9 637ZZ 9 637-2RS 460 200 32
 

 

 

 

8		 12 0.15 2.5 MR128 3.5 MR128ZZ     50 26 46
14 0.2 3.5 MR148 4 MR148ZZ     80 38 43
16 0.2     4 688ZZW4 4 688-2RSW4 120 58 41
16 0.2 4 688 5 688ZZ 5 688-2RS 120 58 41
16 0.2     6 688ZZW6 6 688-2RSW6 120 58 41
19 0.3 6 698 6 698ZZ 6 698-2RS 225 88 41
19 0.3     9 698ZZW9     225 88 41
22 0.3 6 608W6         330 135 39
22 0.3 7 608 7 608ZZ 7 608-2RS 330 135 39
22 0.3     11   11 608-2RSW11 330 135 39
24 0.3 8 628 8 628ZZ 8 628-2RS 335 140 34
28 0.3 9 638 9 638ZZ 9 638-2RS 460 200 32
 




9		 14 0.1 3 679 4.5 679ZZ     93 47 40
17 0.2 4 689 5 689ZZ 5 689-2RS 130 65 42
17 0.2     6 689ZZW6 6 689-2RSW6 130 65 42
20 0.3 6 699 6 699ZZ 6 699-2RS 240 105 39
24 0.3 7 609 7 609ZZ 7 609-2RS 335 140 36
26 0.3 8 629 8 629ZZ 8 629-2RS 460 200 33
30 0.6 10 639 10 639ZZ 10 639-2RS 475 210 29