SKF C3996M carb toroidal roller bearing (c xxxx). Single-row roller bearing with long, slightly crowned rollers rolling in a toroidal outer raceway — combines the self-alignment of a spherical roller bearing with the axial-displacement capability of a cylindrical roller bearing. Fitted on the non-locating shaft position of a paired shaft arrangement so shaft thermal expansion is absorbed internally.
| Type | CARB toroidal roller bearing (C xxxx) |
| Designation | SKF C3996M |
| Bore d | 480 mm |
| HS code | 8482.20 |
| Bore diameter | 480 mm |
| Outside diameter | 650 mm |
| Width | 128 mm |
| Basic dynamic load rating | 3100 kN |
| Basic static load rating | 6100 kN |
| Reference speed | 750 r/min |
| Limiting speed | 1000 r/min |
| SKF performance class | SKF Explorer |
| Number of rows | 1 |
| Locating feature, bearing outer ring | Without |
| Bore type | Cylindrical |
| Cage | Machined brass |
| Radial internal clearance | CN |
| Tolerance class | Normal |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | Without |
| Candidate for remanufacturing | Yes |
| Indicative carbon footprint for new product | 444 kg CO2e |
| Indicative carbon footprint for remanufactured product | 148 kg CO2e |
| Product net weight | 120 kg |
| eClass code | 23-05-09-13 |
| UNSPSC code | 31171505 |
| 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.