6806 Bearing
Bore (d) 30 mm
Outside diameter (D) 42 mm
Width (B) 7 mm
Inches (bore × OD × width) 1.1811 × 1.6535 × 0.2756″
Deep-groove ball bearing, thin section (6800) series. Seal/shield suffixes (ZZ, 2RS, …) change the closures, never these dimensions — a 6806-ZZ and 6806-2RS are the same size.
What the number means
- 6 — deep-groove ball bearing
- 8 — dimension series (thin section (6800))
- 06 — bore code × 5 = 30 mm
Neighboring sizes (thin section (6800) series)
| Designation | Bore | OD | Width |
|---|---|---|---|
| 6804 | 20 mm | 32 mm | 7 mm |
| 6805 | 25 mm | 37 mm | 7 mm |
| 6806 | 30 mm | 42 mm | 7 mm |
| 6807 | 35 mm | 47 mm | 7 mm |
| 6808 | 40 mm | 52 mm | 7 mm |
Same bore, other series
Fits the same 30 mm shaft with a different OD/width envelope and load capacity.
- 6906 — 30 × 47 × 9 mm (thin section (6900))
- 6006 — 30 × 55 × 13 mm (extra light (6000))
- 6206 — 30 × 62 × 16 mm (light (6200))
- 6306 — 30 × 72 × 19 mm (medium (6300))
Common suffixes on a 6806
| 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) |