This series encompasses a variety of imperial-sized variants, characterized by diverse specifications designed to meet the demands of complex operating conditions. Highly granular options are available regarding both inner diameter and width. The standardized flange design effectively addresses the challenge of positioning bearings within housings of varying wall thicknesses.
Bearing Features
Models such as the FR144 are frequently employed in RC drive systems or small drone rotor shafts, where exceptional vibration damping and wear resistance are required. The dense microstructure of the bearing steel ensures resistance to metal fatigue cracking under high-speed centrifugal forces. Prior to shipment, these bearings undergo rigorous dynamic balancing tests to ensure silent operation, thereby enhancing the end-user experience.
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 | FR144 | ZZ | 0.125 | 3.175 | 0.25 | 6.35 | 0.296 | 7.518 | 0.0938 | 2.381 | 0.023 | 0.584 | 0.1094 | 2.778 | 0.031 | 0.787 | 0.0039 | 0.1 | 0.314 | 0.108 | 6.9 | 7.8 |
| F | FR2-5 | ZZ | 0.125 | 3.175 | 0.3125 | 7.938 | 0.359 | 9.119 | 0.1094 | 2.778 | 0.023 | 0.584 | 0.1406 | 3.572 | 0.031 | 0.787 | 0.0039 | 0.1 | 0.559 | 0.176 | 5.9 | 6.7 |
| F | FR2-6 | ZZ | 0.125 | 3.175 | 0.375 | 9.525 | 0.422 | 10.719 | 0.1094 | 2.778 | 0.023 | 0.584 | 0.1406 | 3.572 | 0.031 | 0.787 | 0.0039 | 0.1 | 0.637 | 0.225 | 5.2 | 5.8 |
| F | FR2 | ZZ | 0.125 | 3.175 | 0.375 | 9.525 | 0.44 | 11.176 | 0.1562 | 3.969 | 0.03 | 0.762 | 0.1562 | 3.969 | 0.03 | 0.762 | 0.0118 | 0.3 | 0.627 | 0.216 | 5.2 | 5.8 |
| - | FR2A | ZZ | 0.125 | 3.175 | 0.5 | 12.7 | - | - | 0.1719 | 4.366 | - | - | 0.1719 | 4.366 | - | - | 0.0118 | 0.3 | 0.637 | 0.225 | 4.2 | 4.7 |

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