BEARINGDEXDeep groove ball
6211 bearing
55 mm bore, 100 mm outside diameter, 21 mm width (2.1654 × 3.937 × 0.8268 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 55 | 2.1654 |
| Outside diameter D | 100 | 3.9370 |
| Width B | 21 | 0.8268 |
Quick numbers
| Pitch diameter dm | 77.5 mm |
| Section height (D − d)/2 | 22.5 mm |
| n·dm at 1,800 rpm | 139,500 |
| n·dm at 3,600 rpm | 279,000 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
6Deep groove ball
2Diameter series 2: light. Width series 0 is implied and left off.
11Bore code 11 × 5 = 55 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 6211 | 6211 | 6211 | 6211 | 6211 | 6211 |
| Shields both sides | 6211-2Z | 6211-2ZR | 6211ZZ | 6211ZZ | 6211ZZ | 6211ZZE |
| Contact seals both sides | 6211-2RSH | 6211-2RSR | 6211DDU | 6211LLU | 6211-2RS | 6211-2NSE |
| Contact seals both sides, C3 | 6211-2RSH/C3 | 6211-2RSR-C3 | 6211DDUC3 | 6211LLUC3 | 6211-2RSC3 | 6211-2NSE C3 Verify |
| Non-contact seals both sides | 6211-2RSL | 6211-2BRS Verify | 6211VV | 6211LLB | 6211-2RU Verify | 6211-2NKE Verify |
| Shields both sides, C3 | 6211-2Z/C3 | 6211-2ZR-C3 | 6211ZZC3 | 6211ZZC3 | 6211ZZC3 | 6211ZZE C3 Verify |
Same size, different bearing
These share the 55 × 100 × 21 mm envelope but carry load differently. They aren't drop-in swaps.