NTN Miniature and Extra Small Ball Bearings 608-ZZCM/5K

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The definition of miniature bearing is pointed that the inside diameter of ball bearing is under 9 mm, the standard of NTN various kinds of miniature bearing is in accordance with ISO/ANSI/ABMA standard manufacture, application scope is the most extensive dust cover ball bearings or sealed deep groove ball bearings, some outer ring with snap rings of bearing can simplify the related design. And all part no. can be provided outer ring with snaps rings.
NTN bearing: 608-ZZCM/5K

Dimension

Inner diameter: 8mm

Outer diameter: 22mm

Depth: 7mm

Weight: 13g

Load capacity: 3350N – 1400N

Running speed: 31000 r/min – 36000 r/min
The following are bearing part no. cross reference,

EZO KOYO NMB NSK NTN EZO KOYO NMB NSK
681 681 L-310 681 681 F681 F681 LF-310 F681
MR31 ML1003 L-310W51 MR31 F691 F691 RF-410 F691
691 691 R-410 691 691 MF41X OBF05 RF-412 MF41X
MR41X ML1204 R-412 MR41X BC1.2-4 F681X F68/1.5 RF-415 F681X
681X 68/1.5 L-415 681X 68/1.5 F691X F69/1.5 RF-515 F691X
691X 69/1.5 R-515 691X 69/1.5 F601X OBF08 RF-615 F601X
601X ML1506 R-615 601X 60/1.5 F682 F682 LF-520W02 F682
672 672 672 MF52 OBF11 LF-520W02 MF52
682 682 L-520 682 682 F692 F692 RF-620 F692
MR52 ML2005 L-520W02 MR52 BC2-5 MF62 OBF13 RF-620W52 MF62
692 692 R-620 692 692 MF72 OBF14 RF-720Y52 MF72
MR62 ML2006 R-620W02 MR62 BC2-6 F602 F602 RF-720 F602
MR72 ML2007 R-720W02 MR72 BC2-7 F682X F68/2.5 LF-625 F682X
602 602 R-720 602 602 F692X F69/2.5 RF-725 F692X
682X 68/2.5 L-625 682X 68/2.5 MF82X OBF16 RF-825Y52 MF82X
692X 69/2.5 R-725 692X 69/2.5 F602X OBF17 RF-825 F602X
MR82X ML2508/1B R-825Y52 MR82X BC2.5/8 MF63 MLF3006 LF-630 MF63
602X ML2508/1B R-825 602X 60/2.5 F683 F693 RF-730 F693
MR63 ML3006 L-630 MR63 673 MF83 MLF3008 RF-830Y52 MF83
683 683 L-730 683 683 F693 F693 RF-830 F693
MR83 ML3008 R-830Y52 MR83 BC3-8 MF93 MLF3009 RF-930y52 MF93
693 693 R-830Y52 693 693 F603 F603 RF-930 F603
MR93 ML3009 R-1030 MR93 BC3-9 F623 F623 LF-740 F623
603 603 R-930 603 603 MF74 MLF4007 LF-840 MF74
623 623 R-1030 623 623 MF84 MLF4008 LF-940 MF84
633 633 633 633 F684 F694 LF-1040X2 F694
MR74 ML4007 L-740 MR74 BC4-7 MF104 F604 RF-1140 F604
MR84 ML4008 L-840 MR84 BC4-8 F694 F624 RF-1240 F624
684 684 L-940 684 684 F604 F634 RF-1340 F634
MR104 ML4010 L-1040X2 MR104 BC4-10 F624 F624 RF-1640 F624
694 694 R-1140 694 694 F634 F634 LF-850 F634
604 604 R-1240 604 604 MF85 MLF5008 LF-950 MF85
624 624 R-1340 624 624 MF95 MLF5009 LF-1050 MF95
634 634 R-1640X4 634 634 MF105 MLF5010 LF-1150 MF105
MR85 ML5008 L-850 MR85 675 F685 F685 RF-1350 F685
MR95 ML5009 L-950 MR95 BC5-9 F695 F695 RF-1450 F695
MR105 ML5010 L-1050 MR105 BC5-10 F605 F605 RF-1650X4 F605
685 685 L-1150 685 685 F625 F625 RF-1950 F625
695 695 R-1350 695 695 F635 F635 LF-1060 F635
605 605 R-1450 605 605 MF106 MLF6010 LF-1260 MF106
625 625 R-1650X4 625 625 MF126 MLF6012 LF-1360 MF126
635 635 R-1950 635 635 F686 F686 RF-1560X2 F686
MR106 ML6010 L-1060 MR106 676 F696 F696 RF-1760X2 F696
MR126 ML6012 L-1260 MR126 BC6-12 F606 F606 RF-1960 F606
686 686 L-1360 686 686 F626 F626 LF-1170 F626
696 696 R-1560 696 696 MF117 MLF7011 RF-1370 MF117
606 606 R-1760X2 606 606 MF137 MLF7013 LF-1470 MF137
626 626 R-1960 626 626 F687 F687 F687
636 636 636 636 F697 F697 RF-1970 F697
MR117 ML7011 L-1170 MR117 677 F607 F607 RF-2270 F607
MR137 ML7013 L-1370 MR137 BC7-13 F627 F627 LF-1280 F627
687 687 L-1470 687 687 MF128 MLF8012 LF-1480 MF128
697 697 697 697 MF148 MLF8014 LF-1680 MF148
607 607 R-1970 607 607 F688 F688 RF-1980 F688
627 627 R-2270 627 627 F698 F698 RF-2280 F698
637 637 637 637 F608 F608 F608
MR128 ML8012 L-1280 MR128 678 F679 LF-1790 F679
MR148 ML8014 L-1480 MR148 BC8-14 F689 F689 LF2090 F689
688 688 L-1680 688 688 F699 F699 F699
698 698 R-1980 698 698 F609 F609 LF-1910W7 F609
608 608 R-2280 608 608 F6800 F6800 LF-1910W7 F6800
628 628 628 628 F63800 F63800, F63800
638 638 638 638 F6900 F6900 F6900

The model Numbers and letters meaning: 608 – ZZCM / 5 k

6: bearing series code, meaning deep groove ball bearing,

0: width series code, belong to light series bearing

8: bearing inside diameter code, when inside diameter less than 10 mm with the actual diameter for code;

ZZ: double side dust cover;

CM: standard electric unit clearance;

5 k, sebum label and oil quantity code.