SKF UCF308 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. Shaft bore diameter 40 mm, encoded by the SKF designation.
| Type | Flanged ball bearing unit (UCF / UCFC / UCFL) |
| Designation | SKF UCF308 |
| Bore d | 40 mm |
| HS code | 8483.20 |
| Shaft bore | 40 mm |
| Shaft diameter | 40 mm |
| Housing overall width | 42 mm |
| Width, total | 56 mm |
| Centre distance between bolt holes | 112 mm |
| Bearing width, total | 52 mm |
| Attachment bolt diameter | 16 mm |
| Basic dynamic load rating | 41 kN |
| Basic static load rating | 24 kN |
| Limiting speed | 4200 r/min |
| Note | Limiting speed with shaft tolerance h6 |
| 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 | Bearing steel |
| Coating | Without |
| Sealing, bearing | Seal and flinger on both sides |
| Sealing type | Contact, standard |
| Sealing, unit | Without |
| Lubricant | Grease |
| Relubrication hole | With |
| Grease fitting | With |
| Product net weight | 2.95 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 |
| Dimensions | Shaft bore 40 mm |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.