6810 Bearing
Bore (d) 50 mm
Outside diameter (D) 65 mm
Width (B) 7 mm
Inches (bore × OD × width) 1.9685 × 2.5591 × 0.2756″
Deep-groove ball bearing, thin section (6800) series. Seal/shield suffixes (ZZ, 2RS, …) change the closures, never these dimensions — a 6810-ZZ and 6810-2RS are the same size.
What the number means
- 6 — deep-groove ball bearing
- 8 — dimension series (thin section (6800))
- 10 — bore code × 5 = 50 mm
Neighboring sizes (thin section (6800) series)
Same bore, other series
Fits the same 50 mm shaft with a different OD/width envelope and load capacity.
- 6910 — 50 × 72 × 12 mm (thin section (6900))
- 6010 — 50 × 80 × 16 mm (extra light (6000))
- 6210 — 50 × 90 × 20 mm (light (6200))
- 6310 — 50 × 110 × 27 mm (medium (6300))
Common suffixes on a 6810
| 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) |