| Outside diameter | D | 225 | mm |
| Basic dynamic load rating, radial | Cr | 188,000 | |
| Fatigue load limit, radial | Cur | 8,100 | |
| Reference speed | nϑr | 4,450 |
| Width | B | 49 | mm |
| Basic static load rating, radial | C0r | 150,000 | |
| Limiting speed | nG | 4,050 | |
| Bore diameter | d | 105 | mm |
| Minimum diameter shaft shoulder | da min | 119 | mm |
| Maximum fillet radius | ra max | 2.50 | mm |
| Maximum diameter of housing shoulder | Da max | 211 | mm |
| Minimum chamfer dimension | rmin | 3 | mm |
| Shoulder diameter inner ring | d1 | 144.30 | mm |
| Shoulder diameter outer ring | D1 | 187.90 | mm |
| Manufacturer | Part Number |
|---|---|
| KOYO | 6321 |
| Federal Bearings | 1321 |
| Steyr-Daimler-Puch | 6321 |
| Volvo | 181836 |
| RIV Officine di Villar Perosa | 22B |
| NSK | 6321 (NSK) |
| Bearings Company of America | 321 |
| GPZ Bearings | 321 |
| Hoover | 321 |
| Marlin-Rockwell Corp. | 321-S |
| Fafnir | 321K |
| Fischer Bearings | 6321 |
| ZKL-ZVL | 6321 |
| SKC | 5951518 |
| Hyatt | 3321 |
| ISO | 105BC03 |
| Torrington | 105BC03 |
| FLT | 6321 |
| NTN | 6321 (NTN) |
| RHP | 6321 |
| SKF | 6321 (SKF) |
| SKC | 3014220 |
| Schiess-Froriep | 306321 |
| Steyr-Daimler-Puch | 994010045 |
