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Main Dimensions & Performance Data
| d | 280 mm | Bore diameter |
| D | 380 mm | Outside diameter |
| B | 63.5 mm | Width, inner ring |
| C | 48 mm | Width, outer ring |
| T | 63.5 mm | Width, total |
| Cr | 880,000 N | Basic dynamic load rating, radial |
| C0r | 1,520,000 N | Basic static load rating, radial |
| Cur | 185,000 N | Fatigue load limit, radial |
| nG | 2,030 1/min | Limiting speed |
| nϑr | 940 1/min | Thermal speed rating |
| ≈m | 19.8 kg | Weight |
Mounting dimensions
| da max | 298 mm | Maximum diameter of shaft shoulder |
| db min | 292 mm | Minimum diameter of shaft shoulder |
| Da min | 348 mm | Minimum diameter of housing shoulder |
| Da max | 368 mm | Maximum diameter of housing shoulder |
| Db min | 368 mm | Minimum diameter of housing shoulder |
| Ca min | 11 mm | Minimum axial space |
| Cb min | 15.5 mm | Minimum axial space |
| ra max | 3 mm | Maximum fillet radius of shaft |
| rb max | 2.5 mm | Maximum fillet radius of housing |
Dimensions
| r1, 2 min | 3 mm | Minimum chamfer dimension of inner ring back face |
| r3, 4 min | 2.5 mm | Minimum chamfer dimension of outer ring back face |
| a | 75 mm | Distance between the apexes of the pressure cones |
| d1 | 328 mm | Guidance rib diameter of inner ring |
Temperature range
| Tmin | -30 °C | Operating temperature min. |
| Tmax | 200 °C | Operating temperature max. |
Calculation factors
| e | 0.43 | Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y |
| Y | 1.39 | Dynamic axial load factor |
| Y0 | 0.76 | Static axial load factor |
Additional information
T4EC280 | Comparative designation to ISO 10317 and ISO 355 |
Your current product variant
| Heat treatment | Standard | |
| Cage | Standard | Sheet steel cage, roller-guided |
| Internal design | Standard | |
| Quality level | XL | X-life |
| Number of rolling element rows | 1 | Single-row design |