National 4278 Oil Seal — SKF/CR Equivalent
| SKF / CR Part No. | Catalog Source |
|---|---|
| 18024 | Verified in both SKF 457012 & National 430i catalogs |
| Dimension | Metric (mm) | Inch |
|---|---|---|
| Shaft diameter | 46.02 | 1.812 |
| Housing bore | 78.51 | 3.091 |
| Seal O.D. | 78.64 | 3.096 |
| Width | 12.32 | 0.485 |
Size 46.02 × 78.51 × 12.32 mm (1.812 × 3.091 × 0.485 in), lip material code V — from the National 430i catalog. Always confirm shaft diameter, bore diameter and width against your application before ordering.
Verify dimensions before ordering. Interchange numbers mean the same shaft/bore application, but lip material, spring design or width can differ between brands. Metric sizes can be checked on our oil seal size chart.
Need this seal? Email sales@sealstocks.com with part number National 4278 for stock & pricing. Factory direct, global shipping.