BEARINGDEXCylindrical roller, NJ
NJ310 bearing
50 mm bore, 110 mm outside diameter, 27 mm width (1.9685 × 4.3307 × 1.063 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 50 | 1.9685 |
| Outside diameter D | 110 | 4.3307 |
| Width B | 27 | 1.0630 |
Quick numbers
| Pitch diameter dm | 80.0 mm |
| Section height (D − d)/2 | 30.0 mm |
| n·dm at 1,800 rpm | 144,000 |
| n·dm at 3,600 rpm | 288,000 |
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
10Bore code 10 × 5 = 50 mm
Same size, different bearing
These share the 50 × 110 × 27 mm envelope but carry load differently. They aren't drop-in swaps.