SKF 2311M self-aligning ball bearing (12xx / 13xx / 22xx). Double-row self-aligning ball bearing with a spherical outer-ring raceway that tolerates static shaft-to-housing misalignment up to 3° without affecting bearing life. Series 12xx (light), 13xx (medium) and 22xx (wide) per ISO 15. Suitable for long line-shafts on marine deck machinery and conveyors where accurate housing alignment cannot be guaranteed. Standard cage nylon PA66 or fabric-reinforced phenolic.
| Type | Self-aligning ball bearing (12xx / 13xx / 22xx) |
| Designation | SKF 2311M |
| Bore d | 55 mm |
| HS code | 8482.10 |
| Bore diameter | 55 mm |
| Outside diameter | 120 mm |
| Width | 43 mm |
| Basic dynamic load rating | 76.1 kN |
| Basic static load rating | 24 kN |
| Reference speed | 11000 r/min |
| Limiting speed | 7500 r/min |
| Retaining feature, inner ring | None |
| Locating feature, bearing outer ring | Without |
| Number of rows | 2 |
| Bore type | Cylindrical |
| Cage | Machined brass |
| Radial internal clearance | CN |
| Tolerance class | Normal |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | Without |
| Indicative carbon footprint for new product | 8.5 kg CO2e |
| Product net weight | 2.29 kg |
| eClass code | 23-05-08-06 |
| UNSPSC code | 31171532 |
| 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.