71904 CD/P4A
Precision ball bearing > High precision angular contact ball bearing
71904 CD/P4A - High precision angular contact ball bearing - Precision ball bearing
| Product model | 71904 CD/P4A |
|---|---|
| d | 20 mm |
| D | 37 mm |
| B | 9 mm |
| Limiting speed | 67000 r/min |
| d1 | 25.6mm |
| d2 | 25.6mm |
| D1 | 31.4mm |
| r1,2 | min.0.3mm |
| r3,4 | min.0.2mm |
| a | 8.4mm |
| da | min.22mm |
| db | min.22mm |
| Da | max.35mm |
| Db | max.35.6mm |
| Fillet radius(ra) | max.0.3mm |
| Fillet radius(rb) | max.0.2mm |
| Fuel injector position(dn) | 26.8mm |
| Pu | 0.137kN |
| Oil and gas lubrication can reach the speed | 45000r/min |
| Contact angle(α) | 15° |
| Ball diameter(Dw) | 4.762mm |
| The number of pages(z) | 15 |
| Reference grease quantity(Gref) | 0.45cm³ |
| Preload level A(GA) | 25N |
| Static axial stiffness of preload level A | 22N/µm |
| Preload class B(GB) | 50N |
| Static axial stiffness of preload class B | 29N/µm |
| Preload level C(GC) | 100N |
| Static axial stiffness of preload level C | 40N/µm |
| Preload level D(GD) | 200N |
| Static axial stiffness of preload level D | 56N/µm |
| Correction factor depends on bearing series and size (f) | 1.05 |
| The correction factor depends on the contact angle(f1) | 1 |
| Correction factor, preload class A(f2A) | 1 |
| Correction factor, preload class B(f2B) | 1.04 |
| Correction factor, preload class C(f2C) | 1.09 |
| Correction factor, preload class D(f2D) | 1.15 |
| Correction factor of hybrid ceramic bearing(fHC) | 1 |
| Calculation coefficient(f0) | 9.8 |
| Weight | 0.035kg |
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71904 CD/P4A / High precision angular contact ball bearing / Precision ball bearing