BEARINGDEXCylindrical roller, NU
NU317 bearing
85 mm bore, 180 mm outside diameter, 41 mm width (3.3465 × 7.0866 × 1.6142 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 85 | 3.3465 |
| Outside diameter D | 180 | 7.0866 |
| Width B | 41 | 1.6142 |
Quick numbers
| Pitch diameter dm | 132.5 mm |
| Section height (D − d)/2 | 47.5 mm |
| n·dm at 1,800 rpm | 238,500 |
| n·dm at 3,600 rpm | 477,000 |
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
17Bore code 17 × 5 = 85 mm
Same size, different bearing
These share the 85 × 180 × 41 mm envelope but carry load differently. They aren't drop-in swaps.