686 bearing Consists of an outer and an inner ring, a set of steel ball and a set of cage. Its structure is simple, easy to use, is the most common production, the most widely used type of bearings. Suitable for high speed and high speed running, and very durable, need not often maintenance. These bearing small friction coefficient, high limit speed, simple structure, low manufacturing cost, easy to achieve high manufacturing precision. Bearing can be used for transmission, instruments and meters, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, engineering machinery, the yo-yo roller type rollerblading, etc.
| Bearing | d | D | Open | Closed | Rsmin | Dynamic | Static | Weight |
| model | mm inch | mm inch | mm inch | mm inch | mm inch | Cr N | Cor N | Kg |
| 604 | 4 0.1575 | 12 0.4724 | 4 0.1575 | 4 0.1575 | 0.2 0.008 | 960 | 350 | 0.0023 |
| 605 | 5 0.1969 | 14 0.5512 | 5 0.1969 | 5 0.1969 | 0.2 0.008 | 1070 | 420 | 0.0037 |
| 606 | 6 0.2362 | 17 0.6693 | 6 0.2362 | 6 0.2362 | 0.3 0.012 | 1960 | 730 | 0.0069 |
| 607 | 7 0.2756 | 19 0.784 | 6 0.2362 | 6 0.2362 | 0.3 0.012 | 2800 | 1060 | 0.0028 |
| 608 | 8 0.3150 | 22 0.8661 | 7 0.2756 | 7 0.2756 | 0.3 0.012 | 3290 | 1360 | 0.0129 |
| 626 | 6 0.2362 | 19 0.7480 | 6 0.2362 | 6 0.2362 | 0.3 0.012 | 2800 | 1060 | 0.0086 |
| 687 | 7 0.2756 | 14 0.5512 | 3.5 0.1378 | 5 0.1969 | 0.15 0.006 | 1170 | 510 | 0.003 |
| 688 | 8 0.3150 | 16 0.6299 | 4 0.1575 | 5 0.1969 | 0.2 0.008 | 1250 | 590 | 0.0038 |
| 689 | 9 0.3543 | 17 0.6693 | 4 0.1575 | 5 0.1969 | 0.2 0.008 | 1330 | 660 | 0.044 |
| 694 | 4 0.1575 | 11 0.4331 | 4 0.1575 | 4 0.1575 | 0.15 0006 | 960 | 350 | 0.0017 |
| 695 | 5 0.1969 | 13 0.5118 | 4 0.1575 | 4 0.1575 | 0.2 0.008 | 1070 | 420 | 0.0023 |
| 696 | 6 0.2362 | 15 0.5906 | 5 0.1969 | 5 0.1969 | 0.2 0.012 | 1470 | 600 | 0.0036 |
| 698 | 8 0.3150 | 19 0.7480 | 6 0.2362 | 6 0.2362 | 0.3 0.012 | 2230 | 910 | 0.0076 |
| 699 | 9 0.3543 | 20 0.7874 | 6 0.2362 | 6 0.2362 | 0.3 0.012 | 2480 | 1090 | 0.0085 |
| 686 | 6 0.2362 | 13 0.5118 | 3.5 0.1378 | 5 0.1969 | 0.15 0.006 | 1080 | 440 | 0.0027 |








