BEARINGDEXCylindrical roller, NU
NU306 bearing
30 mm bore, 72 mm outside diameter, 19 mm width (1.1811 × 2.8346 × 0.748 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 30 | 1.1811 |
| Outside diameter D | 72 | 2.8346 |
| Width B | 19 | 0.7480 |
Quick numbers
| Pitch diameter dm | 51.0 mm |
| Section height (D − d)/2 | 21.0 mm |
| n·dm at 1,800 rpm | 91,800 |
| n·dm at 3,600 rpm | 183,600 |
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
06Bore code 06 × 5 = 30 mm
Same size, different bearing
These share the 30 × 72 × 19 mm envelope but carry load differently. They aren't drop-in swaps.