KOYO K25X29X17H needle roller bearings
Various 25 mm d types and 9 mm B sizes to accommodate your KOYO K25X29X17H needle roller bearings requirements.
| d | 25 mm |
| D | 42 mm |
| B | 9 mm |
| d1 | 30.6 mm |
| d2 | 30.6 mm |
| D2 | 39.15 mm |
| r1,2 min. | 0.3 mm |
| r3,4 min. | 0.2 mm |
| a | 12.4 mm |
| da min. | 27 mm |
| da max. | 30.1 mm |
| db min. | 27 mm |
| db max. | 30.1 mm |
| Da max. | 40 mm |
| Db max. | 40.6 mm |
| ra max. | 0.3 mm |
| rb max. | 0.2 mm |
| Basic dynamic load rating C | 6.37 kN |
| Basic static load rating C0 | 3.8 kN |
| Fatigue load limit Pu | 0.16 kN |
| Attainable speed for grease lubrication | 38000 r/min |
| Ball diameter Dw | 4.762 mm |
| Number of balls z | 18 |
| Preload class A GA | 40 N |
| Static axial stiffness, preload class A | 66 N/µm |
| Preload class B GB | 80 N |
| Static axial stiffness, preload class B | 86 N/µm |
| Preload class C GC | 160 N |
| Static axial stiffness, preload class C | 112 N/µm |
| Preload class D GD | 320 N |
| Static axial stiffness, preload class D | 149 N/µm |
| Calculation factor f | 1.07 |
| Calculation factor f1 | 0.98 |
| Calculation factor f2A | 1 |
| Calculation factor f2B | 1.07 |
| Calculation factor f2C | 1.12 |
| Calculation factor f2D | 1.17 |
| Calculation factor fHC | 1.04 |
| 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 | 0.038 kg |
Detailed Parameters
parameter：
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