| Name | Value |
|---|---|
| Bearing number | 71909 CD/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 | 52.6 mm |
| d2 | 52.6 mm |
| D1 | 60.4 mm |
| r1,2 | min. - 0.6 mm |
| r3,4 | min. - 0.3 mm |
| a | 13.6 mm |
| da | min. - 48.2 mm |
| db | min. - 48.2 mm |
| Da | max. - 64.8 mm |
| Db | max. - 66.6 mm |
| ra | max. - 0.6 mm |
| rb | max. - 0.3 mm |
| dn | 54.2 mm |
| Basic dynamic load rating | C - 13 kN |
| Basic static load rating | C0 - 9.5 kN |
| Fatigue load limit | Pu - 0.4 kN |
| Limiting speed for grease lubrication | 19000 r/min |
| Limiting speed for oil lubrication | 32000 mm/min |
| Ball | Dw - 6.35 mm |
| Ball | z - 23 |
| Gref | 1.62 cm3 |
| Calculation factor | f0 - 10.5 |
| Preload class A | GA - 50 N |
| Preload class B | GB - 100 N |
| Preload class C | GC - 200 N |
| Preload class D | GD - 400 N |
| Calculation factor | f - 1.11 |
| Calculation factor | f1 - 1 |
| Calculation factor | f2A - 1 |
| Calculation factor | f2B - 1.04 |
| Calculation factor | f2C - 1.09 |
| Calculation factor | f2D - 1.15 |
| Calculation factor | fHC - 1 |
| Preload class A | 40 N/micron |
| Preload class B | 53 N/micron |
| Preload class C | 73 N/micron |
| Preload class D | 103 N/micron |
| Mass bearing | 0.13 kg |
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