R8 bearing
The R8 is a inch-size (R-series) ball bearing with a 1/2 in bore, 1.125 in outside diameter and 0.3125 in width, open (no seals or shields).
Size & specs
| Type | Inch (R-series) ball bearing |
|---|---|
| Bore (ID) | 1/2 in (12.70 mm) |
| Outside diameter (OD) | 1.125 in (28.57 mm) |
| Width | 0.3125 in (7.94 mm) |
| Seals / shields | Open |
Where to buy
Questions
What size is a R8 bearing?
1/2 × 1.125 × 0.3125 in (bore × outside diameter × width).
What is an open R8 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.