R4 bearing
The R4 is a inch-size (R-series) ball bearing with a 1/4 in bore, 0.625 in outside diameter and 0.196 in width, open (no seals or shields).
Size & specs
| Type | Inch (R-series) ball bearing |
|---|---|
| Bore (ID) | 1/4 in (6.35 mm) |
| Outside diameter (OD) | 0.625 in (15.88 mm) |
| Width | 0.196 in (4.98 mm) |
| Seals / shields | Open |
Where to buy
Questions
What size is a R4 bearing?
1/4 × 0.625 × 0.196 in (bore × outside diameter × width).
What is an open R4 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.