Tapered roller bearing
30211 Bearing Dimensions
30211 tapered roller bearing: bore 55 mm, dimensions 55x100x22.75 mm (ISO 355). Cone and cup widths, designation breakdown and size-equivalent codes.
30211 specifications
| Bore d | 55 mm |
|---|---|
| Outside diameter D | 100 mm |
| Total width T | 22.75 mm — assembled width of cup and cone |
| Seal / shield options | Open (cup and cone, no seals) |
| Material | GCr15 chrome bearing steel (rings and rolling elements) |
| Precision | P0 (standard); P6 on request |
| Radial clearance | Set during mounting (adjustable, not a C-class value) |
| Load ratings | Load ratings available on request for the specific batch and manufacturer. |
How to read the 30211 designation
| Segment | Meaning |
|---|---|
| 3 | Single row tapered roller bearing (metric, ISO 355) |
| 02 | Dimension series 02 |
| 11 | Bore code 11 → 55 mm bore. ISO bore code (00–03 = 10/12/15/17 mm; 04 and above = code × 5 mm). |
30211 interchange by brand
30211 is an ISO designation. The boundary dimensions are identical across manufacturers; only suffixes (seals, clearance, cage) differ.
| SKF | NSK | NTN | FAG | Timken | Note |
|---|---|---|---|---|---|
| 30211 | 30211 | 30211 | 30211 | 30211 | Same ISO designation |
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
Is 30211 the same size across brands?
Yes. 30211 is an ISO designation, so the bore, outside diameter and width are the same whichever manufacturer made it. Brand-specific suffixes only change details such as seals, clearance or cage.
Where are the load ratings for 30211?
Dynamic and static load ratings differ by manufacturer and batch, so they are not published on this page. Load ratings available on request for the specific batch and manufacturer.