The F68 series consists of ultra-thin-walled miniature flanged bearings. Manufactured from SUS440 stainless steel, these bearings combine high hardness with excellent corrosion resistance. Their extremely small cross-section makes them ideal for precision machinery where space constraints are critical.
The key advantage of the F68 series lies in its ultra-thin design, which significantly reduces radial space requirements while maintaining necessary structural strength.
Bearing Features
The integrated flange on the outer ring simplifies axial positioning; during precision assembly, this feature effectively prevents axial displacement within the housing bore, streamlines housing machining processes, and enhances overall assembly efficiency and stability. Constructed from high-carbon chromium stainless steel, the bearings maintain superior geometric precision and wear resistance even during high-speed operation, thereby extending maintenance intervals for equipment subjected to frequent use.
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 | SF681 | - | 1 | 3 | 3.8 | 1 | 0.3 | - | - | 0.05 | 0.074 | 0.02 | 16.5 | 18.5 |
| F | SF682 | ZZ | 2 | 5 | 6.1 | 1.5 | 0.5 | 2.3 | 0.6 | 0.08 | 0.167 | 0.049 | 9.4 | 10.6 |
| F | SF683 | ZZ | 3 | 7 | 8.1 | 2 | 0.5 | 3 | 0.8 | 0.1 | 0.314 | 0.108 | 6.6 | 7.4 |
| F | SF684 | ZZ | 4 | 9 | 10.3 | 2.5 | 0.6 | 4 | 1 | 0.1 | 0.637 | 0.225 | 5.1 | 5.7 |
| F | SF685 | ZZ | 5 | 11 | 12.5 | 3 | 0.8 | 5 | 1 | 0.15 | 0.715 | 0.284 | 4.1 | 4.6 |
| F | SF686 | ZZ | 6 | 13 | 15 | 3.5 | 1 | 5 | 1.1 | 0.15 | 1.08 | 0.441 | 3.5 | 3.9 |
| F | SF687 | ZZ | 7 | 14 | 16 | 3.5 | 1 | 5 | 1.1 | 0.15 | 1.18 | 0.51 | 3.1 | 3.5 |
| F | SF688 | ZZ | 8 | 16 | 18 | 4 | 1 | 5 | 1.1 | 0.2 | 1.25 | 0.588 | 2.8 | 3.1 |
| F | SF689 | ZZ | 9 | 17 | 19 | 4 | 1 | 5 | 1.1 | 0.2 | 1.32 | 0.666 | 2.5 | 2.8 |

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