BEARINGDEXCylindrical roller, NJ
NJ313 bearing
65 mm bore, 140 mm outside diameter, 33 mm width (2.5591 × 5.5118 × 1.2992 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 65 | 2.5591 |
| Outside diameter D | 140 | 5.5118 |
| Width B | 33 | 1.2992 |
Quick numbers
| Pitch diameter dm | 102.5 mm |
| Section height (D − d)/2 | 37.5 mm |
| n·dm at 1,800 rpm | 184,500 |
| n·dm at 3,600 rpm | 369,000 |
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
13Bore code 13 × 5 = 65 mm
Same size, different bearing
These share the 65 × 140 × 33 mm envelope but carry load differently. They aren't drop-in swaps.