BEARINGDEXCylindrical roller, NJ
NJ307 bearing
35 mm bore, 80 mm outside diameter, 21 mm width (1.378 × 3.1496 × 0.8268 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 35 | 1.3780 |
| Outside diameter D | 80 | 3.1496 |
| Width B | 21 | 0.8268 |
Quick numbers
| Pitch diameter dm | 57.5 mm |
| Section height (D − d)/2 | 22.5 mm |
| n·dm at 1,800 rpm | 103,500 |
| n·dm at 3,600 rpm | 207,000 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
NJCylindrical roller. One rib on the inner ring locates the shaft in one direction.
3Diameter series 3: medium
07Bore code 07 × 5 = 35 mm
Same size, different bearing
These share the 35 × 80 × 21 mm envelope but carry load differently. They aren't drop-in swaps.