| Outside diameter | D | 8 | mm |
| Basic dynamic load rating, radial | Cr | 1,780 | |
| Fatigue load limit, radial | Cur | 147 | N |
| Limiting speed for grease lubrication | nG Grease | 25,500 | |
| Under roller diameter | Fw | 4 | mm |
| Width, outer ring | B | 8 | mm |
| Basic static load rating, radial | C0r | 1,310 | |
| Limiting speed | nG | 42,500 | |
| Reference speed | nϑr | 44,500 |
| Minimum chamfer dimension | rmin | 0.30 | mm |
| Minimum width to base of drawn cup with closed end | Ct min | 6.40 | mm |
| Manufacturer | Part Number |
|---|---|
| KOYO | 4MKM88 |
| NTN | BK0408 |
| SKF | BK0408 |
| SKF | RBNA040808 |
