This series encompasses ultra-miniature specifications with inner diameters ranging from 1 mm to 9 mm. Its core advantages lie in exceptional lightweight characteristics and space efficiency. Manufactured from high-quality bearing steel, the bearings feature an integral flange on the outer ring that effectively prevents axial displacement during high-speed operation, ensuring secure installation.
Bearing Features
Structurally, the F68 series utilizes an ultra-thin cross-section design with minimal frictional torque, making it ideal for applications requiring high rotational sensitivity, such as micro-motors, precision instruments, and clockwork mechanisms. Furthermore, the high hardness of the bearing steel provides excellent wear resistance, ensuring a long service life even under limited lubrication conditions. The installation process eliminates the need for complex housing designs, significantly simplifying the assembly of miniature equipment.
Technical Specifications
| Bearing Reference | Boundary Diameters | Basic Dynamic | Basic Static | Limiting Speeds | ||||||||||
| Flange | Open | Shield | d mm |
D mm |
Df mm |
B mm |
Bf mm |
B1 mm |
Bf1 mm |
rsmin mm |
Cr(kN) | Cor(kN) | Grease | Oil |
| F | F681 | - | 1 | 3 | 3.8 | 1 | 0.3 | - | - | 0.05 | 0.074 | 0.02 | 16.5 | 18.5 |
| F | F682 | ZZ | 2 | 5 | 6.1 | 1.5 | 0.5 | 2.3 | 0.6 | 0.08 | 0.167 | 0.049 | 9.4 | 10.6 |
| F | F683 | ZZ | 3 | 7 | 8.1 | 2 | 0.5 | 3 | 0.8 | 0.1 | 0.314 | 0.108 | 6.6 | 7.4 |
| F | F684 | ZZ | 4 | 9 | 10.3 | 2.5 | 0.6 | 4 | 1 | 0.1 | 0.637 | 0.225 | 5.1 | 5.7 |
| F | F685 | ZZ | 5 | 11 | 12.5 | 3 | 0.8 | 5 | 1 | 0.15 | 0.715 | 0.284 | 4.1 | 4.6 |
| F | F686 | ZZ | 6 | 13 | 15 | 3.5 | 1 | 5 | 1.1 | 0.15 | 1.08 | 0.441 | 3.5 | 3.9 |
| F | F687 | ZZ | 7 | 14 | 16 | 3.5 | 1 | 5 | 1.1 | 0.15 | 1.18 | 0.51 | 3.1 | 3.5 |
| F | F688 | ZZ | 8 | 16 | 18 | 4 | 1 | 5 | 1.1 | 0.2 | 1.25 | 0.588 | 2.8 | 3.1 |
| F | F689 | ZZ | 9 | 17 | 19 | 4 | 1 | 5 | 1.1 | 0.2 | 1.32 | 0.666 | 2.5 | 2.8 |

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