SKF F4BR203-SRB-SLH roller-bearing flanged unit. Round or square-flanged cast-iron housing pre-assembled with a spherical roller bearing on adapter sleeve, bolted to a machined face perpendicular to the shaft axis. Four-bolt round (FYNT / FRT) or four-bolt square execution.
| Type | Roller-bearing flanged unit |
| Designation | SKF F4BR203-SRB-SLH |
| HS code | 8483.20 |
| Shaft diameter | 55.563 mm |
| Housing overall width | 60.325 mm |
| Width, total | 81.756 mm |
| Attachment bolt diameter | 15.875 mm |
| Pitch diameter of bolt holes of round and triangle flange type housing | 161.925 mm |
| Bearing width, total | 79.375 mm |
| Basic dynamic load rating | 109 kN |
| Basic static load rating | 127 kN |
| Limiting speed | 8500 r/min |
| Housing type | Flanged |
| Flanged housing type | Round |
| Number of bolt holes for fasteners | 4 |
| Bearing insert | Spherical roller bearing |
| Retaining feature, inner ring | Set screws |
| Bearing position | Locating |
| Bore type | Cylindrical |
| Material, housing | Cast iron |
| Material, bearing | Bearing steel |
| Coating | Without |
| Bearing housing seal type | Labyrinth seal |
| Sealing, unit | Optional end cover |
| Lubricant | Grease |
| Relubrication hole | With |
| Grease fitting | With |
| Product net weight | 6.1 kg |
| eClass code | 23-05-16-90 |
| UNSPSC code | 31171537 |
| Material | As declared by SKF designation suffix |
| Temperature range | Per SKF product data |
| Primary standard | SKF designation convention (see description for governing ISO / DIN) |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.