BEARINGDEXDeep groove ball, thin section
6804 bearing
20 mm bore, 32 mm outside diameter, 7 mm width (0.7874 × 1.2598 × 0.2756 in). SKF numbers it 61804.
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 20 | 0.7874 |
| Outside diameter D | 32 | 1.2598 |
| Width B | 7 | 0.2756 |
Quick numbers
| Pitch diameter dm | 26.0 mm |
| Section height (D − d)/2 | 6.0 mm |
| n·dm at 1,800 rpm | 46,800 |
| n·dm at 3,600 rpm | 93,600 |
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.
04Bore code 04 × 5 = 20 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 61804 | 6804 | 6804 | 6804 | 6804 | 6804 |
| Shields both sides | 61804-2Z | 6804-2ZR | 6804ZZ | 6804ZZ | 6804ZZ | 6804ZZE |
| Contact seals both sides | 61804-2RSH | 6804-2RSR | 6804DDU | 6804LLU | 6804-2RS | 6804-2NSE |
| Contact seals both sides, C3 | 61804-2RSH/C3 | 6804-2RSR-C3 | 6804DDUC3 | 6804LLUC3 | 6804-2RSC3 | 6804-2NSE C3 Verify |
| Non-contact seals both sides | 61804-2RSL | 6804-2BRS Verify | 6804VV | 6804LLB | 6804-2RU Verify | 6804-2NKE Verify |
| Shields both sides, C3 | 61804-2Z/C3 | 6804-2ZR-C3 | 6804ZZC3 | 6804ZZC3 | 6804ZZC3 | 6804ZZE C3 Verify |