6306 bearing
The 6306 is a deep groove ball bearing with a 30 mm bore, 72 mm outside diameter and 19 mm width, open (no seals or shields).
Size & specs
| Type | Deep groove ball bearing, 63 series (heavy) |
|---|---|
| Bore (ID) | 30 mm (1.181 in) |
| Outside diameter (OD) | 72 mm (2.835 in) |
| Width | 19 mm (0.748 in) |
| Seals / shields | Open |
Cross reference: same bearing, other brands
| SKF | 6306 |
|---|---|
| NTN | 6306 |
| NSK | 6306 |
| FAG | 6306 |
| Timken | 6306 |
| Koyo | 6306 |
Budget brands usually sell this as 6306. Add C3 if your old bearing was stamped C3 (looser fit for hot-running motors).
Where to buy
Other bearings with a 30 mm bore
Questions
What size is a 6306 bearing?
30 × 72 × 19 mm (bore × outside diameter × width).
What is an open 6306 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.