6904-2RS bearing
The 6904-2RS is a deep groove ball bearing with a 20 mm bore, 37 mm outside diameter and 9 mm width, rubber sealed on both sides.
Size & specs
| Type | Deep groove ball bearing, 69 series (thin) |
|---|---|
| Bore (ID) | 20 mm (0.787 in) |
| Outside diameter (OD) | 37 mm (1.457 in) |
| Width | 9 mm (0.354 in) |
| Seals / shields | 2RS: rubber sealed on both sides |
Cross reference: same bearing, other brands
| SKF | 6904-2RSH |
|---|---|
| NTN | 6904LLU |
| NSK | 6904DDU |
| FAG | 6904-2RSR |
| Timken | 6904-2RS |
| Koyo | 6904-2RS |
Budget brands usually sell this as 6904-2RS. Add C3 if your old bearing was stamped C3 (looser fit for hot-running motors).
Where to buy
Other versions
Other bearings with a 20 mm bore
Questions
What size is a 6904-2RS bearing?
20 × 37 × 9 mm (bore × outside diameter × width).
What does 2RS mean?
2RS means rubber seals on both sides. Seals keep out dirt and water better than metal shields, which makes them a good default for farm, outdoor and wet equipment.
Is 6904-2RS the same as 6904-2RSH or 6904LLU?
Yes. They share the same size and seal type. Brands just use different suffixes: SKF uses 2RSH, NTN uses LLU, NSK uses DDU and FAG uses 2RSR.