| Name | Value |
|---|---|
| Bearing number | 71909 CB/P4A |
| Size (mm) | 45x68x12 |
| Brand | MBY |
| Bore Diameter (mm) | 45 |
| Outer Diameter (mm) | 68 |
| Width (mm) | 12 |
| Name | Value |
|---|---|
| d | 45 mm |
| D | 68 mm |
| B | 12 mm |
| d1 | 53.45 mm |
| d2 | 52.4 mm |
| D2 | 61.8 mm |
| r1,2 | min. - 0.6 mm |
| r3,4 | min. - 0.3 mm |
| a | 16.1 mm |
| da | min. - 48.2 mm |
| db | min. - 48.2 mm |
| Da | max. - 64.8 mm |
| Db | max. - 66 mm |
| ra | max. - 0.6 mm |
| rb | max. - 0.3 mm |
| dn | 54.2 mm |
| Basic dynamic load rating | C - 7.4 kN |
| Basic static load rating | C0 - 5.7 kN |
| Fatigue load limit | Pu - 0.245 kN |
| Limiting speed for grease lubrication | 28000 r/min |
| Limiting speed for oil lubrication | 43000 mm/min |
| Ball | Dw - 4.762 mm |
| Ball | z - 27 |
| Gref | 1.75 cm3 |
| Calculation factor | f0 - 9.7 |
| Preload class A | GA - 24 N |
| Preload class B | GB - 48 N |
| Preload class C | GC - 145 N |
| Calculation factor | f - 1.08 |
| Calculation factor | f1 - 1 |
| Calculation factor | f2A - 1 |
| Calculation factor | f2B - 1.02 |
| Calculation factor | f2C - 1.07 |
| Calculation factor | fHC - 1 |
| Preload class A | 28 N/micron |
| Preload class B | 37 N/micron |
| Preload class C | 60 N/micron |
| Mass bearing | 0.132 kg |
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