BEARINGDEXBall, inch R series
R8 bearing
1/2 inch bore, 1-1/8 inch outside diameter, 5/16 inch width (12.7 × 28.575 × 7.938 mm).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 12.7 | 0.5000 (1/2) |
| Outside diameter D | 28.575 | 1.1250 (1-1/8) |
| Width B | 7.938 | 0.3125 (5/16) |
Quick numbers
| Pitch diameter dm | 20.6 mm |
| Section height (D − d)/2 | 7.9 mm |
| n·dm at 1,800 rpm | 37,148 |
| n·dm at 3,600 rpm | 74,295 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
RInch-dimension radial ball bearing
8Bore in sixteenths of an inch: 8/16 = 1/2 in