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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) |
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Miniature Ball Bearing Size Chart
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Size
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(d)
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(D)
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B (Open)
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B (Sealed/ Shielded)
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Dynamic Load Rating (LBS)
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Static Load Rating (LBS)
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Grease Limiting Speed 2RS (RPM)
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Grease Limiting Speed ZZ/ Open (RPM)
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Oil Limiting Speed (RPM)
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Weight (LBS)
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|---|---|---|---|---|---|---|---|---|---|---|
| 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.
Frequently Asked Questions
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If your order is less than $300, no problem! Please give us a call at 407-347-3519 or email Sales@usarollerchain.com, and we will be happy to assist you!
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USA Roller Chain utilizes an extensive network of vendors and warehouses to ensure you get your items quickly! Our primary roller chain warehouse is located in Clermont, FL, but we have warehouses located all across the United States. Your order will be shipped from the closest warehouse to you that has your requested product in stock. This speeds up transit times and saves you money on shipping! If you have any questions about where an item will ship from, please CONTACT US
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In-stock items are typically shipped out in 1-3 business days.Made-to-order item lead times vary from 1-2 days up to 14-20+ weeks, depending on the product. If you need your items urgently, please let us know, and we will do our best to meet your required delivery date! If you have any questions, please CONTACT US
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If you are having an issue with your order, please CONTACT US as soon as possible so we can resolve it for you.
Most in-stock items can be returned within 30 days of the shipment date. MTO or Custom orders are not eligible for a return or refund. For a detailed explanation of our return policies, please click here.
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Absolutely! We may be called "USA Roller Chain", but we ship worldwide! Please CONTACT US for Export/International quotes or orders.