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Miniature Ball Bearings

Miniature ball bearings are small metal ball bearings that are less than 1 inch in diameter. These small-profile mini ball bearings provide precise rotational performance and offer light-load capacities. USARollerChain ball bearings are of high quality and tested for proper performance. These tiny ball bearings are shielded or sealed and are offered with or without a flange. The shielded and sealed bearings can be pre-lubricated to ensure smooth rotation, and the shielding and sealing may help provide protection from particles and dirt inadvertently becoming ingrained in the bearing cage, which would reduce performance. Flanged outer rings help mount the bearings. Applications include the medical industry and industrial hand-pieces, flow meters, fuel controls, motors, cryogenic coolers, servos, gyros, and imaging equipment. As with a typical ball bearing, these smaller ball bearings can be purchased with components made out of stainless steel, a corrosion-resistant material for harsher environments.


Open
(No Seal or Sheild)

RS
(Seal on One Side)

2-RS
(Seal on Both Sid)

Z
(Shield on One Sides)

ZZ
(Shields on Both Sides)

NR
(Retaining Ring)

Miniature Ball Bearing Size Chart


Size
(d)
(D)
B (Open)
B (Sealed/ Shielded)
Dynamic Load Rating (LBS)
Static Load Rating (LBS)
Grease Limiting Speed 2RS (RPM)
Grease Limiting Speed ZZ/ Open (RPM)
Oil Limiting Speed (RPM)
Weight (LBS)
603 3 9 3 3 100 50 42000 56000 67000 0.002
604 4 12 4 4 170 80 36000 48000 56000 0.005
605 5 14 5 5 230 100 30000 40000 50000 0.008
606 6 17 6 6 500 185 24000 32000 40000 0.013
607 7 22 7 6 525 200 26000 36000 43000 0.017
608 8 22 7 7 750 315 20000 28000 34000 0.024
608 5/16 7.94 22 7 7 750 315 22000 30000 36000 0.025
609 9 24 7 7 750 310 24000 32000 40000 0.032
623 3 10 4 4 110 50 37000 50000 60000 0.003
624 4 13 5 5 290 100 24000 32000 40000 0.007
625 5 16 5 5 390 140 26000 36000 43000 0.011
626 6 19 6 6 525 200 29000 40000 48000 0.018
626 1/4 6.35 19 6 6 525 200 23000 32000 38000 0.019
627 7 22 7 7 750 300 24000 34000 40000 0.028
627 1/4 6.35 22 7 7 749 300 24000 34000 40000 0.029
628 8 24 8 8 690 350 20000 28000 34000 0.038
629 9 26 8 8 1030 440 24000 34000 40000 0.042
634 4 16 5 5 395 155 26000 36000 43000 0.012
635 5 19 6 6 525 200 27000 38000 45000 0.019
636 6 22 7 7 525 200 22000 30000 36000 0.031
637 7 26 9 9 750 315 20000 28000 34000 0.053
638 8 28 8 8 750 315 20000 28000 34000 0.062
682 2 5 2.3 2.3 30 10 63000 85000 100000 0.0003
683 3 7 3 3 35 15 46000 63000 75000 0.0007
684 4 9 4 4 80 40 39000 53000 63000 0.0014
685 5 11 5 5 125 60 33000 45000 53000 0.0026
686 6 13 5 5 190 90 29000 40000 50000 0.0041
687 7 14 5 5 205 105 29000 40000 50000 0.0045
688 8 16 5 5 235 120 26000 36000 43000 0.0069
689 9 17 5 5 230 130 26000 36000 43000 0.0075
693 3 8 4 4 65 25 44000 60000 67000 0.001
694 4 11 4 4 125 60 36000 48000 56000 0.004
695 5 13 4 4 190 90 32000 43000 50000 0.005
696 6 15 5 5 230 110 29000 40000 45000 0.009
698 8 19 6 6 290 150 26000 36000 43000 0.016
699 9 20 6 6 310 160 24000 34000 40000 0.019

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