The 67 series consists of ultra-thin-walled bearings manufactured from SUS316, a material offering superior performance. SUS316 contains 2–3% molybdenum (Mo), providing exceptional resistance to pitting corrosion—particularly in environments such as seawater (containing chloride ions) or chemical vapors. These thin-walled flanged bearings are frequently used in the precision rotating shafts of marine exploration instruments.
Bearing Features
The series is highly space-efficient; the flanged design addresses the challenge of securing bearings within thin-walled housings, as the flange mounts directly against the housing to enable the assembly of extremely compact mechanical structures. SUS316 offers better bio-inertness than SUS304; consequently, the 6700–6706 series is commonly used in centrifuges and biochemical analyzers—specifically in components handling corrosive liquids—to ensure that no metal ions leach out and interfere with experiments.
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 | SF6700 | ZZ | 2RS | 10 | 15 | 16.5 | 3/4 | 0.8 | 0.15 | 0.853 | 0.431 | 2.6 | 3 |
| F | SF6701 | ZZ | 2RS | 12 | 18 | 19.5 | 4 | 0.8 | 0.2 | 0.921 | 0.529 | 2.2 | 2.5 |
| F | SF6702 | ZZ | 2RS | 15 | 21 | 22.5 | 4 | 0.8 | 0.2 | 0.941 | 0.578 | 1.8 | 2.1 |
| F | SF6703 | ZZ | 2RS | 17 | 23 | 24.5 | 4 | 0.8 | 0.2 | 1 | 0.657 | 1.7 | 1.9 |
| F | SF6704 | ZZ | 2RS | 20 | 27 | 28.5 | 4 | 0.8 | 0.2 | 1.04 | 0.725 | 1.4 | 1.6 |
| F | SF6705 | - | 2RS | 25 | 32 | 34 | 4 | 1 | 0.2 | 1.09 | 0.843 | 1.2 | 1.3 |
| F | SF6706 | - | 2RS | 30 | 37 | 39 | 4 | 1 | 0.2 | 1.15 | 0.951 | 1 | 1.1 |

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