7221 ACD/P4A
Precision ball bearing > High precision angular contact ball bearing
7221 ACD/P4A - High precision angular contact ball bearing - Precision ball bearing
| Product model | 7221 ACD/P4A |
|---|---|
| d | 105 mm |
| D | 190 mm |
| B | 36 mm |
| Limiting speed | 10000 r/min |
| d1 | 131.2mm |
| d2 | 131.2mm |
| D1 | 163.8mm |
| r1,2 | min.2.1mm |
| r3,4 | min.1.1mm |
| a | 52.6mm |
| 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 | 5.1kN |
| Oil and gas lubrication can reach the speed | 6700r/min |
| Contact angle(α) | 25° |
| Ball diameter(Dw) | 26.988mm |
| The number of pages(z) | 15 |
| Reference grease quantity(Gref) | 48.333cm³ |
| Preload level A(GA) | 1000N |
| Static axial stiffness of preload level A | 308N/µm |
| Preload class B(GB) | 2000N |
| Static axial stiffness of preload class B | 399N/µm |
| Preload level C(GC) | 4000N |
| Static axial stiffness of preload level C | 527N/µm |
| Preload level D(GD) | 8000N |
| Static axial stiffness of preload level D | 708N/µm |
| Correction factor depends on bearing series and size (f) | 1.08 |
| The correction factor depends on the contact angle(f1) | 0.99 |
| Correction factor, preload class A(f2A) | 1 |
| Correction factor, preload class B(f2B) | 1.01 |
| Correction factor, preload class C(f2C) | 1.02 |
| Correction factor, preload class D(f2D) | 1.05 |
| Correction factor of hybrid ceramic bearing(fHC) | 1 |
| Limit value (e) | 0.68 |
| Axial load factor (single shaft, tandem shaft)(Y2) | 0.87 |
| Axial load factor (single shaft, tandem shaft)(Y0) | 0.38 |
| Axial load factor (single shaft, tandem shaft)(X2) | 0.41 |
| Axial load factor (back to back, face to face) (Y1) | 0.92 |
| Axial load factor (back to back, face to face) (Y2) | 1.41 |
| Axial load factor (back to back, face to face) (Y0) | 0.76 |
| Radial load factor (back to back, face to face) (X2) | 0.67 |
| Weight | 3.87kg |
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7221 ACD/P4A / High precision angular contact ball bearing / Precision ball bearing