BEARINGDEXDeep groove ball, thin section
6909 bearing
45 mm bore, 68 mm outside diameter, 12 mm width (1.7717 × 2.6772 × 0.4724 in). SKF numbers it 61909.
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 45 | 1.7717 |
| Outside diameter D | 68 | 2.6772 |
| Width B | 12 | 0.4724 |
Quick numbers
| Pitch diameter dm | 56.5 mm |
| Section height (D − d)/2 | 11.5 mm |
| n·dm at 1,800 rpm | 101,700 |
| n·dm at 3,600 rpm | 203,400 |
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.
09Bore code 09 × 5 = 45 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 61909 | 6909 | 6909 | 6909 | 6909 | 6909 |
| Shields both sides | 61909-2Z | 6909-2ZR | 6909ZZ | 6909ZZ | 6909ZZ | 6909ZZE |
| Contact seals both sides | 61909-2RSH | 6909-2RSR | 6909DDU | 6909LLU | 6909-2RS | 6909-2NSE |
| Contact seals both sides, C3 | 61909-2RSH/C3 | 6909-2RSR-C3 | 6909DDUC3 | 6909LLUC3 | 6909-2RSC3 | 6909-2NSE C3 Verify |
| Non-contact seals both sides | 61909-2RSL | 6909-2BRS Verify | 6909VV | 6909LLB | 6909-2RU Verify | 6909-2NKE Verify |
| Shields both sides, C3 | 61909-2Z/C3 | 6909-2ZR-C3 | 6909ZZC3 | 6909ZZC3 | 6909ZZC3 | 6909ZZE C3 Verify |