728 CD/HCP4A
Precision ball bearing > High precision angular contact ball bearing
728 CD/HCP4A - Precision ball bearing - High precision angular contact ball bearing
| Product model | 728 CD/HCP4A |
|---|---|
| d | 8 mm |
| D | 24 mm |
| B | 8 mm |
| Limiting speed | 130000 r/min |
| d1 | 13.1mm |
| d2 | 13.1mm |
| D1 | 18.9mm |
| r1,2 | min.0.3mm |
| r3,4 | min.0.2mm |
| a | 6.2mm |
| da | min.10.4mm |
| db | min.10.4mm |
| Da | max.21.6mm |
| Db | max.22.2mm |
| Fillet radius(ra) | max.0.3mm |
| Fillet radius(rb) | max.0.2mm |
| Fuel injector position(dn) | 14.3mm |
| Pu | 0.043kN |
| Oil and gas lubrication can reach the speed | 85000r/min |
| Contact angle(α) | 15° |
| Ball diameter(Dw) | 4.762mm |
| The number of pages(z) | 8 |
| Reference grease quantity(Gref) | 0.228cm³ |
| Preload level A(GA) | 14N |
| Static axial stiffness of preload level A | 13N/µm |
| Preload class B(GB) | 28N |
| Static axial stiffness of preload class B | 17N/µm |
| Preload level C(GC) | 56N |
| Static axial stiffness of preload level C | 23N/µm |
| Preload level D(GD) | 112N |
| Static axial stiffness of preload level D | 33N/µm |
| Correction factor depends on bearing series and size (f) | 1.02 |
| 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) | 7.9 |
| Weight | 0.015kg |
Product Details
The 728 CD/HCP4A is part of the High precision angular contact ball bearing series within our Precision ball bearing range. It is engineered for high-performance industrial use and delivers reliable operation under demanding working conditions.
Typical applications include: electric motors, pumps, gearboxes, agricultural machinery and automotive systems. For detailed dimensions and load ratings, please refer to the specification table above. Contact FIJ for bulk pricing, technical support or customized solutions.
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728 CD/HCP4A / High precision angular contact ball bearing / Precision ball bearing