7012 CBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7012 CBGA/HCP4A Bearing Product Overview & Core Advantages
The 7012 CBGA/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. This single bearing features a 15° contact angle and is manufactured to P4A tolerance class, ensuring ultra-precise rotational characteristics. Its core advantages include the ability to accommodate combined loads (radial and axial), superior high-speed capabilities with a limiting speed of 33,000 rpm, and high rigidity due to its optimized internal geometry. The use of a phenolic cage and ceramic balls contributes to reduced friction, lower operating temperatures, and extended service life, making it ideal for high-reliability applications.
7012 CBGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Standard bore diameter (60 mm) and series designation. |
| C | Specific internal design and 15° contact angle. |
| B | Indicates a 40° contact angle variant is not applicable; confirms the design. |
| GA | Specifies an Extra light (Class A) preload for minimal friction and high-speed operation. |
| HC | Indicates the use of Hybrid Ceramic balls (Ceramic balls with steel rings). |
| P4A | Denotes a super-precision tolerance class with enhanced running accuracy. |
7012 CBGA/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A tolerance class with tight dimensional control on the bearing dimensions (bore, OD, width), this bearing provides exceptional running accuracy and system stiffness, crucial for precision machinery.
Superior High-Speed Performance: The combination of a lightweight phenolic cage, hybrid ceramic balls, and an extra light preload (GA) minimizes centrifugal forces and friction, enabling stable operation at the high limiting speed of 33,000 rpm.
Enhanced Load Capacity: The 15° contact angle is optimized to handle significant combined loads, providing robust support for both radial and axial forces with a dynamic load rating of 3285 lbf.
Advanced Material Technology: The ceramic balls offer advantages including electrical insulation, reduced weight, higher stiffness, and superior performance in high-temperature or minimally lubricated environments.
7012 CBGA/HCP4A Bearing Typical Application Areas
This precision angular contact ball bearing is designed for the most demanding applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace and Defense Actuation Systems
- Medical and Dental Handpiece Drives
