ISB 248/1800 K spherical roller bearings
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| Size (mm) | 250x140x42 |
| Bore Diameter (mm) | 250 |
| Outer Diameter (mm) | 140 |
| Width (mm) | 42 |
| d | 140 mm |
| D | 250 mm |
| B | 42 mm |
| d1 | 176.8 mm |
| d2 | 176.8 mm |
| D1 | 213.2 mm |
| r1,2 – min. | 3 mm |
| r3,4 – min. | 1.5 mm |
| a | 47.3 mm |
| da – min. | 154 mm |
| db – min. | 154 mm |
| Da – max. | 236 mm |
| Db – max. | 241 mm |
| ra – max. | 2.5 mm |
| rb – max. | 1.5 mm |
| dn | 184.8 mm |
| Basic dynamic load rating – C | 221 kN |
| Basic static load rating – C0 | 240 kN |
| Fatigue load limit – Pu | 7.4 kN |
| Limiting speed for grease lubrication | 7000 r/min |
| Limiting speed for oil lubrication | 10000 mm/min |
| Ball – Dw | 30.162 mm |
| Ball – z | 18 |
| Gref | 83.931 cm3 |
| Calculation factor – f0 | 15.2 |
| Preload class A – GA | 850 N |
| Preload class B – GB | 1700 N |
| Preload class C – GC | 3400 N |
| Preload class D – GD | 6800 N |
| Calculation factor – f | 1 |
| Calculation factor – f2A | 1 |
| Calculation factor – f2B | 1.01 |
| Calculation factor – f2C | 1.03 |
| Calculation factor – f2D | 1.06 |
| Calculation factor – fHC | 1.01 |
| Preload class A | 181 N/micron |
| Preload class B | 245 N/micron |
| Preload class C | 339 N/micron |
| Preload class D | 485 N/micron |
| r1,2 min. | 3 mm |
| r3,4 min. | 1.5 mm |
| da min. | 154 mm |
| db min. | 154 mm |
| Da max. | 236 mm |
| Db max. | 241 mm |
| ra max. | 2.5 mm |
| rb max. | 1.5 mm |
| Basic dynamic load rating C | 221 kN |
| Basic static load rating C0 | 240 kN |
| Fatigue load limit Pu | 7.35 kN |
| Attainable speed for grease lubrication | 7000 r/min |
| Attainable speed for oil-air lubrication | 10000 r/min |
| Ball diameter Dw | 30.162 mm |
| Number of balls z | 18 |
| Reference grease quantity Gref | 83.931 cm³ |
| Preload class A GA | 850 N |
| Static axial stiffness, preload class A | 181 N/µm |
| Preload class B GB | 1700 N |
| Static axial stiffness, preload class B | 245 N/µm |
| Preload class C GC | 3400 N |
| Static axial stiffness, preload class C | 339 N/µm |
| Preload class D GD | 6800 N |
| Static axial stiffness, preload class D | 485 N/µm |
| Calculation factor f | 1.09 |
| Calculation factor f1 | 1 |
| Calculation factor f2A | 1 |
| Calculation factor f2B | 1.01 |
| Calculation factor f2C | 1.03 |
| Calculation factor f2D | 1.06 |
| Calculation factor fHC | 1.01 |
| Calculation factor f0 | 15.2 |
| Mass bearing | 6.92 kg |
Detailed Parameters
parameter：
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