| Width, inner ring | Bi | 29 | mm |
| Bore diameter | d | 55 | mm |
| Limiting speed | nG | 7,500 | |
| Basic static load rating, radial | C0r | 175,000 | |
| Width, total | T | 31.50 | mm |
| Outside diameter | D | 120 | mm |
| Thermal speed rating | nϑr | 4,350 | |
| Fatigue load limit, radial | Cur | 27,500 | |
| Basic dynamic load rating, radial | Cr | 180,000 | |
| Width, outer ring | B | 25 | mm |
| Guidance rib diameter of inner ring | d1 | 85.40 | mm |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 2 | mm |
| Distance between the apexes of the pressure cones | a | 25 | mm |
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 2.50 | mm |
| Maximum fillet radius of shaft | ra max | 2.50 | mm |
| Maximum diameter of housing shoulder | Da max | 110 | mm |
| Maximum diameter of shaft shoulder | da max | 71 | mm |
| Minimum axial space | Ca min | 6.50 | mm |
| Minimum diameter of shaft shoulder | db min | 65 | mm |
| Manufacturer | Part Number |
|---|---|
| SKF | 30311-J2-Q (SKF) |
| NTN | 4T-30311 (NTN) |
