7008 CEGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7008 CEGA/P4A Bearing Product Overview & Core Advantages
The 7008 CEGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, it offers superior dimensional and running accuracy. Its 15° contact angle and extra light preload (Class A) make it ideally suited for high-speed operation while providing excellent resistance to combined loads. The bearing comes pre-lubricated and is universally matchable (SU), allowing for precise axial play adjustment when mounted with a second, identical bearing.
7008 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CE | Optimized internal geometry for low torque and heat generation | Enhanced high-speed performance and energy efficiency. |
| GA | Light preload applied | Increased rigidity and precise shaft positioning without manual adjustment. |
| P4A | High precision tolerance class | Superior running accuracy, reduced vibration, and extended service life in precision applications. |
7008 CEGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a phenolic resin cage, a 15° contact angle, and optimized internal geometry (CE designation) allows for a very high limiting speed of 56,000 rpm. This makes it an excellent high-speed bearing.
High Rigidity and Load Capacity: As a single-row angular contact ball bearing, it is designed to support significant combined radial and axial loads in one direction. The extra light preload (Class A) further enhances system rigidity, minimizing deflection under load.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures precise shaft guidance and minimal runout, which is critical for precision machinery.
Universal Matching: The Universal Matchable (SU) feature allows any two 7008 CEGA/P4A bearings to be mounted together in a back-to-back or face-to-face arrangement to support bidirectional axial loads, providing great application flexibility.
7008 CEGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- High-Frequency Spindles: In PCB drilling and precision engraving machines.
- Precision Gearboxes: Especially in high-speed stages where accurate shaft positioning is critical.
- Industrial Pumps and Compressors: For handling axial and radial loads in high-speed rotational systems.
- Robotics and Automation: In articulated arm joints and precision rotary axes.
