Bearing
| ISO | NNU 4921 K |
| GOST | 4162921 7634-75 NNU 4921 K |
| Inner diameter (d, mm) | 105 |
| Outer diameter (D, mm) | 145 |
| Width (height) (B, mm) | 40 |
| Weight (m,kg) | 2 |
| Dynamic bearing capacity (C, kH) | - |
| Static bearing capacity (Co, kH) | - |
| Speed at the grease (n prev. Rev / min) | - |
| Speed at the liquid lubricant (n prev. Rev / min) | - |