FOR REFERENCE ONLY
Bearing No. 30311JR
Specification data (main dimensions, etc.)
| d(mm) | 55 |
|---|---|
| D(mm) | 120 |
| T(mm) | 31.5 |
| B(mm) | 29 |
| C(mm) | 25 |
| r(min.)(mm) | 2.5 |
| r1(min.)(mm) | 2 |
| Basic load ratings : Cr(kN) | 187 |
| Basic load ratings : C0r(kN) | 170 |
| Fatigue load limit : Cu(kN) | 27.0 |
| Limiting speeds(Grease lub.)(min-1) | 3300 |
| Limiting speeds(Oil lub.)(min-1) | 4500 |
| Load center spread : a(mm) | 25.5 |
| Constant e | 0.35 |
| Axial load factors : Y1 | 1.74 |
| Axial load factors : Y0 | 0.96 |
Mounting dimensions,weight (reference)
| da(min.)(mm) | 67 mm |
|---|---|
| db(max.)(mm) | 71 mm |
| Da(max.)(mm) | 108 mm |
| da(min.)(mm) | 104 mm |
| db(min.)(mm) | 111 mm |
| Sa(min.)(mm) | 4 mm |
| Sb(min.)(mm) | 6.5 mm |
| ra(max.)(mm) | 2 mm |
| rb(max.)(mm) | 2 mm |
| Mass(Refer.)(kg) | 1.65 kg |
2026/07/21