708 CD/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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708 CD/P4A Bearing Product Overview & Core Advantages
The 708 CD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate primarily combined loads (radial and axial), its 15° contact angle provides optimal performance for high-speed operation. Manufactured to P4 (ABEC-7) tolerance class, this bearing delivers superior running accuracy and is preloaded for immediate high-stiffness performance in demanding machinery.
Model Code Breakdown
- 708: Basic bearing series designation.
- CD: Indicates a specific internal design with a 15° contact angle and optimized internal geometry for high-speed performance.
- P4A: Denotes the tolerance class P4 (ABEC-7) and specific internal clearance/geometry for preload applications, ensuring high precision and rigidity.
708 CD/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: The P4 tolerance class and phenolic resin cage contribute to exceptional dimensional stability and low vibration, making it ideal for high-speed spindles. The bearing is supplied preloaded, eliminating initial axial play and providing immediate high system stiffness.
Optimized for High-Speed Operation: The lightweight phenolic cage and 15° contact angle are engineered to minimize centrifugal forces and friction, supporting a high limiting speed of 130,000 rpm.
Superior Load Capacity: Manufactured from chrome steel for both rings and balls, this bearing offers a high dynamic load rating of 731 lbf, providing reliable performance under demanding combined load conditions.
708 CD/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications requiring high rotational speed and accuracy, including:
- Machine Tool Spindles
- High-Speed Motors
- Precision Grinding Spindles
- Dental and Medical Handpieces
- High-Frequency Spindles
