BEARINGDEXDeep groove ball, thin section
6905 bearing
25 mm bore, 42 mm outside diameter, 9 mm width (0.9843 × 1.6535 × 0.3543 in). SKF numbers it 61905.
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 25 | 0.9843 |
| Outside diameter D | 42 | 1.6535 |
| Width B | 9 | 0.3543 |
Quick numbers
| Pitch diameter dm | 33.5 mm |
| Section height (D − d)/2 | 8.5 mm |
| n·dm at 1,800 rpm | 60,300 |
| n·dm at 3,600 rpm | 120,600 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
6Deep groove ball, thin section
9Diameter series 9: very thin. Width series 0 is implied and left off.
05Bore code 05 × 5 = 25 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 61905 | 6905 | 6905 | 6905 | 6905 | 6905 |
| Shields both sides | 61905-2Z | 6905-2ZR | 6905ZZ | 6905ZZ | 6905ZZ | 6905ZZE |
| Contact seals both sides | 61905-2RSH | 6905-2RSR | 6905DDU | 6905LLU | 6905-2RS | 6905-2NSE |
| Contact seals both sides, C3 | 61905-2RSH/C3 | 6905-2RSR-C3 | 6905DDUC3 | 6905LLUC3 | 6905-2RSC3 | 6905-2NSE C3 Verify |
| Non-contact seals both sides | 61905-2RSL | 6905-2BRS Verify | 6905VV | 6905LLB | 6905-2RU Verify | 6905-2NKE Verify |
| Shields both sides, C3 | 61905-2Z/C3 | 6905-2ZR-C3 | 6905ZZC3 | 6905ZZC3 | 6905ZZC3 | 6905ZZE C3 Verify |