BEARINGDEXDeep groove ball, thin section
6808 bearing
40 mm bore, 52 mm outside diameter, 7 mm width (1.5748 × 2.0472 × 0.2756 in). SKF numbers it 61808.
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 40 | 1.5748 |
| Outside diameter D | 52 | 2.0472 |
| Width B | 7 | 0.2756 |
Quick numbers
| Pitch diameter dm | 46.0 mm |
| Section height (D − d)/2 | 6.0 mm |
| n·dm at 1,800 rpm | 82,800 |
| n·dm at 3,600 rpm | 165,600 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
6Deep groove ball, thin section
8Diameter series 8: thin section. Width series 0 is implied and left off.
08Bore code 08 × 5 = 40 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 61808 | 6808 | 6808 | 6808 | 6808 | 6808 |
| Shields both sides | 61808-2Z | 6808-2ZR | 6808ZZ | 6808ZZ | 6808ZZ | 6808ZZE |
| Contact seals both sides | 61808-2RSH | 6808-2RSR | 6808DDU | 6808LLU | 6808-2RS | 6808-2NSE |
| Contact seals both sides, C3 | 61808-2RSH/C3 | 6808-2RSR-C3 | 6808DDUC3 | 6808LLUC3 | 6808-2RSC3 | 6808-2NSE C3 Verify |
| Non-contact seals both sides | 61808-2RSL | 6808-2BRS Verify | 6808VV | 6808LLB | 6808-2RU Verify | 6808-2NKE Verify |
| Shields both sides, C3 | 61808-2Z/C3 | 6808-2ZR-C3 | 6808ZZC3 | 6808ZZC3 | 6808ZZC3 | 6808ZZE C3 Verify |