6309 bearing
The 6309 is a deep groove ball bearing with a 45 mm bore, 100 mm outside diameter and 25 mm width, open (no seals or shields).
Size & specs
| Type | Deep groove ball bearing, 63 series (heavy) |
|---|---|
| Bore (ID) | 45 mm (1.772 in) |
| Outside diameter (OD) | 100 mm (3.937 in) |
| Width | 25 mm (0.984 in) |
| Seals / shields | Open |
Cross reference: same bearing, other brands
| SKF | 6309 |
|---|---|
| NTN | 6309 |
| NSK | 6309 |
| FAG | 6309 |
| Timken | 6309 |
| Koyo | 6309 |
Budget brands usually sell this as 6309. Add C3 if your old bearing was stamped C3 (looser fit for hot-running motors).
Where to buy
Other bearings with a 45 mm bore
Questions
What size is a 6309 bearing?
45 × 100 × 25 mm (bore × outside diameter × width).
What is an open 6309 bearing?
It has no seals or shields, so it must be lubricated by the machine (oil bath or grease). Choose 2RS or ZZ if the bearing needs to stay clean on its own.