Bearing 7021B KOYO 7021B KOYO bearing Size Chart (mm/inches) |
|---|
| d | 80 mm |
| D | 125 mm |
| B | 22 mm |
| d1 | 93.9 mm |
| d2 | 93.9 mm |
| D2 | 113.95 mm |
| r1,2 min. | 1.1 mm |
| r3,4 min. | 0.6 mm |
| a | 35 mm |
| da min. | 86 mm |
| da max. | 93.3 mm |
| db min. | 86 mm |
| db max. | 93.3 mm |
| Da max. | 119 mm |
| Db max. | 121 mm |
| ra max. | 1 mm |
| rb max. | 0.6 mm |
| Basic dynamic load rating C | 62.4 kN |
| Basic static load rating C0 | 58.5 kN |
| Fatigue load limit Pu | 2.45 kN |
| Attainable speed for grease lubrication | 12000 r/min |
| Ball diameter Dw | 14.288 mm |
| Number of balls z | 20 |
| Preload class A GA | 390 N |
| Static axial stiffness, preload class A | 247 N/µm |
| Preload class B GB | 780 N |
| Static axial stiffness, preload class B | 323 N/µm |
| Preload class C GC | 1560 N |
| Static axial stiffness, preload class C | 429 N/µm |
| Preload class D GD | 3120 N |
| Static axial stiffness, preload class D | 581 N/µm |
| Calculation factor f | 1.13 |
| Calculation factor f1 | 0.99 |
| Calculation factor f2A | 1 |
| Calculation factor f2B | 1.02 |
| Calculation factor f2C | 1.05 |
| Calculation factor f2D | 1.08 |
| Calculation factor fHC | 1.02 |
| Calculation factor e | 0.68 |
| Calculation factor (single, tandem) Y2 | 0.87 |
| Calculation factor (back-to-back, face-to-face) Y1 | 0.92 |
| Calculation factor (back-to-back, face-to-face) Y2 | 1.41 |
| Mass bearing | 0.72 kg |