7221 CD/HCP4A
Precision ball bearing > High precision angular contact ball bearing
7221 CD/HCP4A - High precision angular contact ball bearing - Precision ball bearing
| Product model | 7221 CD/HCP4A |
|---|---|
| d | 105 mm |
| D | 190 mm |
| B | 36 mm |
| Limiting speed | 14000 r/min |
| d1 | 131.2mm |
| d2 | 131.2mm |
| D1 | 163.8mm |
| r1,2 | min.2.1mm |
| r3,4 | min.1.1mm |
| a | 37.9mm |
| da | min.117mm |
| db | min.117mm |
| Da | max.178mm |
| Db | max.183mm |
| Fillet radius(ra) | max.2mm |
| Fillet radius(rb) | max.1mm |
| Fuel injector position(dn) | 138.4mm |
| Pu | 3.9kN |
| Oil and gas lubrication can reach the speed | 9000r/min |
| Contact angle(α) | 15° |
| Ball diameter(Dw) | 26.988mm |
| The number of pages(z) | 15 |
| Reference grease quantity(Gref) | 48.333cm³ |
| Preload level A(GA) | 650N |
| Static axial stiffness of preload level A | 143N/µm |
| Preload class B(GB) | 1300N |
| Static axial stiffness of preload class B | 193N/µm |
| Preload level C(GC) | 2600N |
| Static axial stiffness of preload level C | 269N/µm |
| Preload level D(GD) | 5200N |
| Static axial stiffness of preload level D | 387N/µm |
| Correction factor depends on bearing series and size (f) | 1.08 |
| The correction factor depends on the contact angle(f1) | 1 |
| Correction factor, preload class A(f2A) | 1 |
| Correction factor, preload class B(f2B) | 1.01 |
| Correction factor, preload class C(f2C) | 1.03 |
| Correction factor, preload class D(f2D) | 1.06 |
| Correction factor of hybrid ceramic bearing(fHC) | 1.01 |
| Calculation coefficient(f0) | 14.5 |
| Weight | 3.14kg |
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7221 CD/HCP4A / High precision angular contact ball bearing / Precision ball bearing