708 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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708 CD/HCP4A Bearing Product Overview & Core Advantages
The 708 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional performance. Its defining characteristic is the 15° contact angle, which enables it to support significant combined loads—both radial and axial—in one direction. Manufactured to P4 (ABEC-7) tolerance class, it guarantees superior running accuracy. A key performance feature is its preload availability, which ensures high system rigidity and minimizes axial and radial runout. The combination of a ceramic ball material and a phenolic cage contributes to its high limiting speed of 160,000 rpm, making it an ideal high-speed bearing for demanding applications.
708 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 708 CD | The basic bearing designation, indicating the specific bearing size and internal design. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic balls, which reduce friction, heat generation, and allow for higher speeds. |
| P4A | Denotes the tolerance class P4 (ABEC-7) and the availability of preload (A), ensuring extreme precision and rigidity. |
708 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design, combined with the option for preload, provides exceptional system stiffness and precise shaft positioning, critical for high-accuracy machinery.
- Superior High-Speed Performance: The hybrid ceramic construction (steel rings with ceramic balls) significantly lowers centrifugal forces and friction. This, paired with the lightweight phenolic cage, enables the very high limiting speed of 160,000 rpm.
- Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle combined loads, offering a robust solution where both radial and single-direction axial forces are present.
- Pre-Lubricated for Immediate Use: The bearing comes lubricated from the factory, simplifying installation and ensuring immediate, reliable operation.
708 CD/HCP4A Bearing Typical Application Areas
- High-Frequency Spindles in CNC machining centers and PCB drilling machines
- Precision Instrumentation and medical devices
- High-performance Electric Motor shafts
- Turbochargers and other high-speed rotating assemblies
- Advanced robotics and automation equipment
