The flanged design of the R3 series enhances its mounting stability in complex sheet-metal assemblies. Constructed from SUS304 stainless steel, these bearings offer resistance to chemical splashes, making them suitable for use in laboratory equipment and chemical analysis instruments. As SUS304 features an austenitic structure that does not exhibit low-temperature brittleness, these models deliver reliable performance in low-temperature storage systems and cold-chain handling equipment.
Bearing Features
Variants such as the R3A offer slight adjustments to width or flange dimensions, providing designers with greater flexibility to accommodate varying mounting hole tolerances; the flange effectively compensates for oversized installation holes.
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 | SFR156 | ZZ | 0.1875 | 4.762 | 0.3125 | 7.938 | 0.359 | 9.119 | 0.1094 | 2.778 | 0.023 | 0.584 | 0.125 | 3.175 | 0.036 | 0.914 | 0.0039 | 0.1 | 0.363 | 0.147 | 5.2 | 5.8 |
| F | SFR166 | ZZ | 0.1875 | 4.762 | 0.375 | 9.525 | 0.422 | 10.719 | 0.125 | 3.175 | 0.023 | 0.584 | 0.125 | 3.175 | 0.031 | 0.787 | 0.0039 | 0.1 | 0.706 | 0.274 | 4.6 | 5.2 |
| - | SFR3 | ZZ | 0.1875 | 4.762 | 0.5 | 12.7 | - | - | 0.1562 | 3.969 | - | - | 0.196 | 4.978 | - | - | 0.0118 | 0.3 | 1.3 | 0.49 | 3.8 | 4.2 |
| - | SFR3A | ZZ | 0.1875 | 4.762 | 0.625 | 15.875 | - | - | 0.196 | 4.978 | - | - | 0.196 | 4.978 | - | - | 0.0118 | 0.3 | 1.48 | 0.617 | 3.2 | 3.6 |

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