BEARINGDEXDeep groove ball, thin section
6902 bearing
15 mm bore, 28 mm outside diameter, 7 mm width (0.5906 × 1.1024 × 0.2756 in). SKF numbers it 61902.
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 15 | 0.5906 |
| Outside diameter D | 28 | 1.1024 |
| Width B | 7 | 0.2756 |
Quick numbers
| Pitch diameter dm | 21.5 mm |
| Section height (D − d)/2 | 6.5 mm |
| n·dm at 1,800 rpm | 38,700 |
| n·dm at 3,600 rpm | 77,400 |
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.
02Bore code 02 is a fixed code for 15 mm
How each brand writes it
Same bearing, every maker's notation| Version | SKF | FAG | NSK | NTN | Koyo | NACHI |
|---|---|---|---|---|---|---|
| Open | 61902 | 6902 | 6902 | 6902 | 6902 | 6902 |
| Shields both sides | 61902-2Z | 6902-2ZR | 6902ZZ | 6902ZZ | 6902ZZ | 6902ZZE |
| Contact seals both sides | 61902-2RSH | 6902-2RSR | 6902DDU | 6902LLU | 6902-2RS | 6902-2NSE |
| Contact seals both sides, C3 | 61902-2RSH/C3 | 6902-2RSR-C3 | 6902DDUC3 | 6902LLUC3 | 6902-2RSC3 | 6902-2NSE C3 Verify |
| Non-contact seals both sides | 61902-2RSL | 6902-2BRS Verify | 6902VV | 6902LLB | 6902-2RU Verify | 6902-2NKE Verify |
| Shields both sides, C3 | 61902-2Z/C3 | 6902-2ZR-C3 | 6902ZZC3 | 6902ZZC3 | 6902ZZC3 | 6902ZZE C3 Verify |