| Name | Value |
|---|---|
| Bearing number | 71909 ACE/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 | 52.7 mm |
| d2 | 51 mm |
| D1 | 60.3 mm |
| r1,2 | min. - 0.6 mm |
| r3,4 | min. - 0.3 mm |
| a | 20 mm |
| da | min. - 48.2 mm |
| db | min. - 47 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 - 9.8 kN |
| Basic static load rating | C0 - 6.6 kN |
| Fatigue load limit | Pu - 0.275 kN |
| Limiting speed for grease lubrication | 25000 r/min |
| Limiting speed for oil lubrication | 39000 mm/min |
| Ball | Dw - 6.35 mm |
| Ball | z - 21 |
| Gref | 1.5 cm3 |
| Calculation factor | e - 0.68 |
| Calculation factor | Y2 - 0.87 |
| Calculation factor | Y0 - 0.38 |
| Calculation factor | X2 - 0.41 |
| Calculation factor | Y1 - 0.92 |
| Calculation factor | Y2 - 1.41 |
| Calculation factor | Y0 - 0.76 |
| Calculation factor | X2 - 0.67 |
| Preload class A | GA - 88 N |
| Preload class B | GB - 265 N |
| Preload class C | GC - 529 N |
| Calculation factor | f - 1.09 |
| Calculation factor | f1 - 0.99 |
| Calculation factor | f2A - 1 |
| Calculation factor | f2B - 1.04 |
| Calculation factor | f2C - 1.07 |
| Calculation factor | fHC - 1 |
| Preload class A | 85 N/micron |
| Preload class B | 127 N/micron |
| Preload class C | 166 N/micron |
| Mass bearing | 0.13 kg |
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