6011 Bearing
Bore (d) 55 mm
Outside diameter (D) 90 mm
Width (B) 18 mm
Inches (bore × OD × width) 2.1654 × 3.5433 × 0.7087″
Deep-groove ball bearing, extra light (6000) series. Seal/shield suffixes (ZZ, 2RS, …) change the closures, never these dimensions — a 6011-ZZ and 6011-2RS are the same size.
What the number means
- 6 — deep-groove ball bearing
- 0 — dimension series (extra light (6000))
- 11 — bore code × 5 = 55 mm
Neighboring sizes (extra light (6000) series)
| Designation | Bore | OD | Width |
|---|---|---|---|
| 6009 | 45 mm | 75 mm | 16 mm |
| 6010 | 50 mm | 80 mm | 16 mm |
| 6011 | 55 mm | 90 mm | 18 mm |
| 6012 | 60 mm | 95 mm | 18 mm |
Same bore, other series
Fits the same 55 mm shaft with a different OD/width envelope and load capacity.
Common suffixes on a 6011
| Suffix | Meaning |
|---|---|
| ZZ / 2Z | steel shields both sides (metal, non-contact) |
| Z | steel shield, one side |
| 2RS | contact rubber seals both sides (SKF 2RS1, NSK DDU, NTN LLU) |
| RS | contact rubber seal, one side |
| 2RZ | low-friction non-contact seals both sides (NSK VV, NTN LLB) |
| C3 | radial internal clearance greater than Normal (common in motors) |
| C2 | radial internal clearance smaller than Normal |
| NR | snap ring groove in the outer ring, with snap ring |
| P6 / P5 / P4 | ISO precision classes (≈ ABEC 3 / 5 / 7) |