The 68 series consists of thin-section, flanged deep-groove ball bearings and represents the most widely used thin-section series made from 316-grade stainless steel. In high-speed chemical pump shaft sealing applications, the 68 series not only ensures low-friction rotation but also withstands corrosion from the pumped media; the flange serves as a support interface for the secondary seal.
Bearing Features
SUS316 material offers superior creep strength at elevated temperatures, making this series more stable than standard stainless steel for precision drive components requiring high-temperature sterilization or operation near thermochemical reactors. The flanged design eliminates the need for bearing caps and reduces the total number of parts; combined with the exceptional corrosion resistance of SUS316, this significantly lowers the total lifecycle cost.
Technical Specifications
| Bearing Reference | Boundary Diameters | Basic Dynamic | Basic Static | Limiting Speeds | |||||||||
| Flange | Open | Shield | seal | d(mm) | D(mm) | Df(mm) | B/B1(mm) | Bf(mm) | rsmin(mm) | Cr(kN) | Cor(kN) | Grease | Oil |
| F | SF6800 | ZZ | 2RS | 10 | 19 | 21 | 5 | 0.8 | 0.3 | 1.72 | 0.843 | 2.3 | 2.6 |
| F | SF6801 | ZZ | 2RS | 12 | 21 | 23 | 5 | 1.1 | 0.3 | 1.91 | 1.04 | 2 | 2.2 |
| F | SF6802 | ZZ | 2RS | 15 | 24 | 26 | 5 | 1.1 | 0.3 | 2.07 | 1.25 | 1.7 | 1.9 |
| F | SF6803 | ZZ | 2RS | 17 | 26 | 28 | 5 | 1.1 | 0.3 | 2.23 | 1.46 | 1.5 | 1.7 |
| F | SF6804 | ZZ | 2RS | 20 | 32 | 35 | 7 | 1.5 | 0.3 | 4.02 | 2.46 | 1.3 | 1.4 |
| F | SF6805 | ZZ | 2RS | 25 | 37 | 40 | 7 | 1.5 | 0.3 | 4.3 | 2.93 | 1.1 | 1.2 |
| F | SF6806 | ZZ | 2RS | 30 | 42 | 45 | 7 | 1.5 | 0.3 | 4.54 | 3.4 | 0.9 | 1 |

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