26 models in the 311 series, 55–55.001 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
| Model | Brand | Bore d (mm) | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| 311KDD FS50000 | TIMKEN | — | |||
| 311KDDG | TIMKEN | — | |||
| 311KFS50000 | TIMKEN | — | |||
| 311KS | TIMKEN | — | |||
| 311NPP | TIMKEN | Cross-ref → | |||
| 311WDD | TIMKEN | — | |||
| 311WDN | TIMKEN | — | |||
| 311 | SKF | 55 | 120 | 29 | — |
| 311 NR | SKF | 55 | 120 | 29 | — |
| 311-2Z | SKF | 55 | 120 | 29 | — |
| 311-2ZNR | SKF | 55 | 120 | 29 | — |
| 311-Z | SKF | 55 | 120 | 29 | — |
| 311-ZNR | SKF | 55 | 120 | 29 | — |
| 311K | ANDGE | 55 | 120 | 29 | Cross-ref → |
| 311KD | ANDGE | 55 | 120 | 29 | — |
| 311KDD | ANDGE | 55 | 120 | 29 | — |
| 311NP | ANDGE | 55 | 120 | 29 | — |
| 311NPP | ANDGE | 55 | 120 | 29 | Cross-ref → |
| 311S | ANDGE | 55 | 120 | 29 | — |
| 311SF | ANDGE | 55 | 120 | 29 | — |
| 311SFF | ANDGE | 55 | 120 | 29 | — |
| 311SFFG | ANDGE | 55 | 120 | 29 | — |
| 311SZ | ANDGE | 55 | 120 | 29 | — |
| 311SZZ | ANDGE | 55 | 120 | 29 | — |
| 311K | TIMKEN | 55.001 | 120 | 28.999 | Cross-ref → |
| 311W | TIMKEN | 55.001 | 120 | 28.999 | — |
311 series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Deep Groove Ball Bearings series: 62 · 60 · 63 · 618 · 619 · 69 · 68 · 160