BEARINGDEXBall, inch R series
R20 bearing
1-1/4 inch bore, 2-1/4 inch outside diameter, 1/2 inch width (31.75 × 57.15 × 12.7 mm).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 31.75 | 1.2500 (1-1/4) |
| Outside diameter D | 57.15 | 2.2500 (2-1/4) |
| Width B | 12.7 | 0.5000 (1/2) |
Quick numbers
| Pitch diameter dm | 44.5 mm |
| Section height (D − d)/2 | 12.7 mm |
| n·dm at 1,800 rpm | 80,010 |
| n·dm at 3,600 rpm | 160,020 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
RInch-dimension radial ball bearing
20Bore in sixteenths of an inch: 20/16 = 1-1/4 in