The FR1-4 is an ultra-small imperial flanged bearing, featuring an inner diameter measured in inches. Its design focuses on precision control within confined spaces; the flanged design eliminates the need for cumbersome fasteners while utilizing a step on the outer ring to provide micron-level axial positioning. In aerospace micro-assemblies or advanced medical devices, this imperial specification ensures compatibility with standard imperial components.
Bearing Features
The high purity of the bearing steel results in an ultra-smooth raceway surface, minimizing the friction coefficient and reducing power loss. Capable of maintaining a consistent axis of rotation at extremely high speeds, it serves as a critical support component for high-precision motion in miniature rotary assemblies.
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 | FR1-4 | 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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