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Why Choose NKMB 6800 Series Thin Bearings
NKMB 6800 series thin bearings are one of the most widely used slim deep groove ball bearings, known for high speed, low friction, and compact design. These bearings are ideal for electric motors, automation systems, and precision machinery.
With more than 20 years of production experience, NKMB guarantees stable quality and consistent performance. We offer OEM customization, multiple sealing types such as ZZ and 2RS, low MOQ, and fast global shipping, helping customers achieve efficient and cost-effective solutions.
| earing No. | Bore diameter | Outer diameter | Width | Radius | Basic rated load | Limit speed | Ball Complement | Weight | |||
| D | D | W | R | Kg/pc | |||||||
| Mm Inch | Mm Inch | Mm Inch | Mm Inch | Dynamic load | Static load | Grease | Oil | No. | Size. | ||
| C | co | R/min | R/min | mm | |||||||
| 685 | 5\ 1969 | 11\ .4331 | 3\ .1181 | 0.15\ .006 | 0.715 | 0.282 | 35000 | 45000 | 8 | 1.588 | 0.0011 |
| 686 | 6\.2362 | 13\ .5118 | 3.5\ .1378 | 0.15\ .006 | 1.08 | 0.44 | 33000 | 42000 | 8 | 2 | 0.0019 |
| 687 | 7\.2756 | 14\ .5512 | 3.5\ .1378 | 0.15\ .006 | 1.17 | 0.51 | 31000 | 40000 | 9 | 2 | 0.0021 |
| 688 | 8\.315 | 16\ .6299 | 4\ .1575 | 0.2\ .008 | 1.26 | 0.585 | 29000 | 38000 | 9 | 2.381 | 0.0031 |
| 689 | 9\.3543 | 17\ .6693 | 4\ .1575 | 0.2\ .008 | 1.72 | 0.82 | 28000 | 36000 | 11 | 2 | 0.0032 |
| 6800 | 10\.3937 | 19\ .7480 | 5\.1969 | 0.3\ .012 | 1.83 | 0.925 | 26000 | 34000 | 9 | 2.381 | 0.005 |
| 6801 | 12\.4724 | 21\ ,8268 | 5\.1969 | 0.3\ .012 | 1.92 | 1.04 | 22000 | 30000 | 12 | 2.381 | 0.006 |
| 6802 | 15\.5906 | 24\ ,9449 | 5\.1969 | 0.3\ .012 | 2.08 | 1.26 | 20000 | 28000 | 14 | 2.381 | 0.007 |
| 6803 | 17\ .6693 | 26\ 1.0236 | 5\.1969 | 0.3\ .012 | 2.81 | 1.72 | 19000 | 26000 | 15 | 2.381 | 0.008 |
| 6804 | 20\.7874 | 32\ 1.2598 | 7\.2756 | 0.3\ .012 | 4 | 2.47 | 17000 | 22000 | 13 | 3.5 | 0.019 |
| 6805 | 25\.9843 | 37\ 1.4567 | 7\.2756 | 0.3\ .012 | 4.3 | 2.95 | 15000 | 19000 | 16 | 3.5 | 0.022 |
| 6806 | 30\1.1811 | 42\ 1.6535 | 7\.2756 | 0.3\ .012 | 4.7 | 3.65 | 13000 | 17000 | 18 | 3.5 | 0.026 |
| 6807 | 35\1.3780 | 47\ 1.8504 | 7\.2756 | 0.3\ .012 | 4.9 | 4.05 | 11000 | 15000 | 22 | 3.175 | 0.029 |
| 6808 | 40\1.5748 | 52\ 2.0472 | 7\.2756 | 0.3\ .012 | 5.1 | 4.4 | 9000 | 13000 | 24 | 3.175 | 0.033 |
| 6809 | 45\1.7717 | 58\ 2.2835 | 7\.2756 | 0.3\ .012 | 6.4 | 5.65 | 7000 | 11000 | 27 | 3.175 | 0.04 |
| 6810 | 50\1.9685 | 65\ 2.5591 | 7\.2756 | 0.3\ .012 | 6.6 | 6.1 | 5000 | 9000 | 29 | 3.175 | 0.052 |
