SKF 252X280.5X38DOCH60 metal face seal (duo-cone / mud seal). Rotary metal face seal — two lapped cast-alloy sealing rings loaded together by opposed elastomer torics. Designed to seal shafts running in gritty, abrasive slurry conditions where a lip seal would be immediately destroyed. Standard on track-drive final-drives on tracked excavators, dozers and marine deck-machinery where dredge slurry, cement wash or seawater is present. Nominal shaft speed to 4 m/s.
| Type | Metal face seal (Duo-Cone / mud seal) |
| Designation | SKF 252X280.5X38DOCH60 |
| HS code | 8484.20 |
| Inside diameter | 252 mm |
| Outside diameter | 280.5 mm |
| Seal width | 38 mm |
| Shaft diameter, maximum | 237 mm |
| Nominal bore depth | 18 mm |
| Design | With O-rings (DO) |
| Sealing lip material | Cast iron |
| Rubber energizer | Hydrogenated nitrile rubber (HNBR) |
| Product net weight | 1.81 kg |
| eClass code | 23-07-08-02 |
| UNSPSC code | 31181602 |
| 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.