The R133 is a miniature flanged bearing. Its specific inner-to-outer diameter ratio makes it the preferred choice for precision fluid control components, such as miniature pumps and flow meters. Thanks to the good toughness of SUS304 stainless steel, the bearing is less prone to structural cracking during installation involving slight compression—unlike bearings made of more brittle bearing steel or martensitic stainless steel.
Bearing Features
SUS304 is a recognized food-grade material; when used in applications like small water dispenser motors or coffee machine mixing shafts, the R133 flanged bearing can come into direct contact with water or steam without leaching heavy metal contaminants, thereby meeting stringent hygiene and safety standards. Due to the material's inherent chemical stability and the self-healing capability of its oxide film (passivation layer), the flange face and raceways retain a pristine, like-new appearance even after long-term storage in high-humidity environments.
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 | SFR133 | ZZ | 0.0938 | 2.381 | 0.1875 | 4.762 | 0.234 | 5.944 | 0.0625 | 1.588 | 0.018 | 0.457 | 0.0938 | 2.381 | 0.031 | 0.787 | 0.0039 | 0.1 | 0.186 | 0.059 | 9.2 | 10.4 |

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