BEARINGDEXTapered roller
30311 bearing
55 mm bore, 120 mm outside diameter, 31.5 mm width (2.1654 × 4.7244 × 1.2402 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 55 | 2.1654 |
| Outside diameter D | 120 | 4.7244 |
| Width T | 31.5 | 1.2402 |
Quick numbers
| Pitch diameter dm | 87.5 mm |
| Section height (D − d)/2 | 32.5 mm |
| n·dm at 1,800 rpm | 157,500 |
| n·dm at 3,600 rpm | 315,000 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
3Tapered roller
03Dimension series 03: width 0, diameter 3 (medium)
11Bore code 11 × 5 = 55 mm