SKF FYJ509 flanged ball bearing unit (ucf / ucfc / ucfl). Square four-bolt (UCF), round three-bolt (UCFC) or oval two-bolt (UCFL) flanged housing pre-assembled with a spherical-outer-ring insert bearing. Absorbs shaft-to-housing misalignment on assembly. Set-screw shaft attachment on standard UC-series insert; eccentric-collar (UEL) or adapter-sleeve (UK) variants available. Dimensioned to ISO 3228 / DIN 626.
| Type | Flanged ball bearing unit (UCF / UCFC / UCFL) |
| Designation | SKF FYJ509 |
| Bore d | 45 mm |
| HS code | 8483.20 |
| Spherical seating diameter | 85 mm |
| Housing overall width | 38 mm |
| Centre distance between bolt holes | 105 mm |
| Housing type | Flanged |
| Flanged housing type | Square |
| Number of bolt holes for fasteners | 4 |
| Fastening bolt hole type | Plain |
| Material, housing | Cast iron |
| Coating | Without |
| Relubrication hole | With |
| Grease fitting | With |
| Product net weight | 1.47 kg |
| eClass code | 23-05-16-02 |
| UNSPSC code | 31171536 |
| Material | As declared by SKF designation suffix |
| Temperature range | Per SKF product data |
| Primary standard | SKF designation convention |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.