Radial spherical plain bearing, requiring maintenance, steel/steel sliding contact surface, metric sizes, DIN ISO 12240-1, dimension series E
Radial spherical plain bearings are designed to accommodate radial and combined radial and axial loads, and also misalignment. The bearing can be relubricated via lubrication holes and an annular groove in both rings.
| Requiring maintenance | Maintenance | |
| Steel/Steel | Sliding contact surface | |
| Without | Sealing | |
| Bearing steel | Material, inner ring | |
| Bearing steel | Material, outer ring |
| d | 280 mm | Bore diameter |
| D | 400 mm | Outside diameter |
| B | 155 mm | Width inner ring |
| C | 120 mm | Width outer ring |
| dk | 350 mm | Ball diameter |
| a | 6 ° | Tilt angle |
| r1 | 1.1 mm | Chamfer dimension |
| r2 | 1.1 mm | Chamfer dimension |
| Cr | 3550 kN | Basic dynamic load rating, radial |
| C0r | 18000 kN | Basic static load rating, radial |
| ≈m | 65.06 kg | Weight |
| da min | 294 mm | Connection measure inner ring, min. |
| da max | 313.8 mm | Connection measure inner ring, max. |
| Da min | 342 mm | Housing connection diameter, min. |
| Da max | 388.5 mm | Housing Shoulder diameter, max. |
| ra min | 1 mm | Fillet radius shaft, min |
| rb max | 1 mm | Fillet radius housing, max. |
| Min. | 0.125 mm | Radial clearance |
| Max. | 0.239 mm | Radial clearance |
| dUT | -0.035 mm | Bore diameter,lower tolerance |
| DUT | -0.040 mm | Outside diameter,lower tolerance |
| BUT | -0.35 mm | Inner ring width,lower tolerance |
| CUT | -0.80 mm | Outer ring width, lower tolerance |
| Tmin | -50 °C | Operating temperature min. |
| Tmax | 150 °C | Operating temperature max. |
| RBC | TORRINGTON | IKO | NTN | LS |
| MB280-9L | 280FS400 | GE280ES | SA1-280 | GE280ES |
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