7002 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7002 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 7002 CEGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. This single bearing features a 15° contact angle and is manufactured to a P4A tolerance class, ensuring ultra-precise running characteristics. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, superior high-speed capability enabled by its phenolic cage and ceramic balls, and a universal matchable (SU) design that allows for precise bearing arrangement in pairs. This bearing is pre-lubricated and optimized for high reliability in demanding, high-rigidity applications.
7002 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 7002: Basic bearing series, indicating a 15mm bore and 32mm outside diameter.
- C: Designates a 15° contact angle.
- E: Indicates an optimized internal design, often for higher speeds and lower torque.
- GA: Signifies a specific preload level (Extra light / Class A).
- HCP4A: Denotes the tolerance class (P4A) and material/design features (HC likely referring to the hybrid ceramic construction).
7002 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling a very high limiting speed of 127,000 rpm. This construction also offers superior resistance to wear and electrical arcing.
- Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to smooth operation at high speeds, providing excellent dimensional stability and low centrifugal forces.
- High-Precision P4A Grade: Manufactured to ultra-precise P4A tolerance class, this bearing delivers exceptional running accuracy, minimal vibration, and is ideal for applications requiring high positional precision.
- Universal Matchability (SU): As a universal matchable bearing, two 7002 CEGA/HCP4A bearings can be paired in a back-to-back or face-to-face arrangement to achieve a pre-defined preload, simplifying installation and ensuring optimal system rigidity.
- Optimized Preload (Class A): The extra light preload minimizes friction and heat build-up while ensuring sufficient stiffness for high-precision applications.
7002 CEGA/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace Instrumentation and Gyroscopes
- Semiconductor Manufacturing Equipment
- Medical and Dental Handpieces
