BEARINGDEXCylindrical roller, NU
NU320 bearing
100 mm bore, 215 mm outside diameter, 47 mm width (3.937 × 8.4646 × 1.8504 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 100 | 3.9370 |
| Outside diameter D | 215 | 8.4646 |
| Width B | 47 | 1.8504 |
Quick numbers
| Pitch diameter dm | 157.5 mm |
| Section height (D − d)/2 | 57.5 mm |
| n·dm at 1,800 rpm | 283,500 |
| n·dm at 3,600 rpm | 567,000 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
NUCylindrical roller. Ribs on the outer ring only, so the shaft can float axially.
3Diameter series 3: medium
20Bore code 20 × 5 = 100 mm
Same size, different bearing
These share the 100 × 215 × 47 mm envelope but carry load differently. They aren't drop-in swaps.