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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 |
Request for a Quote on Miniature Ball Bearings
If you would like to place a bulk order on miniature ball bearings or need help with specifications or other information from our specialists call or fill out the form below and click "Submit" when you are ready. After submitting the form, our customer service team will get back with you as soon as possible.