SKF FY1.1/4TF/VA228 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 FY1.1/4TF/VA228 |
| HS code | 8483.20 |
| Shaft diameter | 31.75 mm |
| Housing overall width | 34.5 mm |
| Width, total | 46.4 mm |
| Centre distance between bolt holes | 92 mm |
| Bearing width, total | 42.9 mm |
| Attachment bolt diameter | 9.525 mm |
| Basic dynamic load rating | 25.5 kN |
| Basic static load rating | 15.3 kN |
| Limiting speed | 160 r/min |
| Maximum operating temperature | 350 °C |
| Housing type | Flanged |
| Flanged housing type | Square |
| Number of bolt holes for fasteners | 4 |
| Fastening bolt hole type | Plain |
| Retaining feature, inner ring | Set screws |
| Bore type | Cylindrical |
| Rubber seating ring | Without |
| Material, housing | Cast iron |
| Material, bearing | High temperature steel |
| Coating | Zinc-coated housing and manganese phosphate coated bearing |
| Sealing, bearing | Shield and flinger on both sides |
| Sealing type | Non-contact |
| Sealing, unit | Without |
| Lubricant | Solid lubricant |
| Relubrication hole | Without |
| Grease fitting | Without |
| Product net weight | 1.41 kg |
| eClass code | 23-05-90-90 |
| 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.