Made from SUS304 austenitic stainless steel, this material features a high chromium and nickel content. Its corrosion resistance far surpasses that of the 400 series in humid or mildly acidic/alkaline environments (such as those involving kitchen appliances or cleaning equipment). Unlike 420-grade steel, it is not prone to surface oxidation spots, ensuring ease of maintenance and cleanliness.
Bearing Features
In its annealed state, SUS304 is essentially non-magnetic. For precision laboratory instruments or electronic testing equipment sensitive to magnetic fields, the use of R1-4 flanged bearings effectively minimizes electromagnetic interference and enhances sensor reading accuracy. Its imperial design and precision flange make it highly compatible with medical devices or aviation models built to European and American standards; the flange ensures stable support when mounted on plastic housings or aluminum alloy brackets.
Technical Specifications
| Bearing Reference | Boundary Diameters | Basic Dynamic | Basic Static | Limiting Speeds | ||||||||||||||||||
| Flange | Open | Shield | d inch |
d mm |
D inch |
D mm |
Df inch |
Df mm |
B inch |
B mm |
Bf inch |
Bf mm |
B1 inch |
B1 mm |
Bf1 inch |
Bf1 mm |
rsmin inch |
rsmin mm |
Cr kN |
Cor kN |
Grease | Oil |
| F | SFR1-4 | ZZ | 0.0781 | 1.984 | 0.25 | 6.35 | 0.296 | 7.518 | 0.0938 | 2.381 | 0.023 | 0.584 | 0.1406 | 3.572 | 0.031 | 0.787 | 0.0039 | 0.1 | 0.284 | 0.098 | 7.9 | 8.9 |

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