This series of imperial miniature bearings boasts an exceptionally wide range of applications. From high-end computer peripherals to precision fishing gear, the convenience offered by their flanged design—enabling precise assembly without the need for axial retaining rings—is evident. The R188 model, in particular, is frequently utilized in high-performance rotating assemblies due to its excellent rotational inertia characteristics.
Bearing Features
The strength and toughness of the bearing steel ensure resistance to breakage under sudden overloads. Beyond securing the bearing in place, the flange acts as a physical barrier, reducing the direct ingress of external contaminants into the bearing's interior. Furthermore, their standardized dimensions ensure a high degree of versatility and interchangeability within the global supply chain.
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 | FR168 | ZZ | 0.25 | 6.35 | 0.375 | 9.525 | 0.422 | 10.719 | 0.125 | 3.175 | 0.023 | 0.584 | 0.125 | 3.175 | 0.036 | 0.914 | 0.0039 | 0.1 | 0.372 | 0.176 | 4.2 | 4.7 |
| F | FR188 | ZZ | 0.25 | 6.35 | 0.5 | 12.7 | 0.547 | 13.894 | 0.125 | 3.175 | 0.023 | 0.584 | 0.1875 | 4.762 | 0.045 | 1.143 | 0.0059 | 0.15 | 1.08 | 0.441 | 3.5 | 3.9 |
| F | FR4 | ZZ | 0.25 | 6.35 | 0.625 | 15.875 | 0.69 | 17.526 | 0.196 | 4.978 | 0.042 | 1.067 | 0.196 | 4.978 | 0.042 | 1.067 | 0.0118 | 0.3 | 1.48 | 0.617 | 3 | 3.3 |
| - | FR4A | ZZ | 0.25 | 6.35 | 0.75 | 19.05 | - | - | 0.2188 | 5.556 | - | - | 0.2812 | 7.144 | - | - | 0.0157 | 0.4 | 2.33 | 0.892 | 2.6 | 2.9 |

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