7020 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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7020 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 7020 CD/HCP4AQBCA is a precision quadruplex matched angular contact ball bearing designed for applications demanding extreme rigidity and accuracy. This high-precision P4A tolerance class bearing features a back-to-back quadruplex arrangement, enabling it to handle significant combined loads (radial and axial) from multiple directions simultaneously. Its construction with a phenolic cage and ceramic balls is optimized for high-speed operation, making it an ideal solution for ultra-rigid, high-performance spindles and other precision machinery where uncompromising stability is required.
7020 CD/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Standard bore diameter (100 mm) and series designation. |
| CD | Specifies a 15° contact angle, optimized for high-speed performance. |
| HC | Indicates the use of hybrid ceramic balls (silicon nitride), which reduce centrifugal forces, lower operating temperatures, and extend service life at high speeds. |
| P4A | Denotes a super-precision tolerance class, ensuring exceptionally tight running accuracy and minimal rotational runout. |
| QBC | Signifies a Quadruplex Back-to-Back matched set. Four bearings are supplied as a pre-matched unit to provide maximum system rigidity and precise preload characteristics. |
7020 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and moments. This configuration is essential for applications where shaft deflection must be minimized.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and hybrid ceramic balls significantly reduces centrifugal forces and friction, allowing for a high limiting speed of 20,000 rpm. The 15° contact angle is specifically chosen for high-speed, high-precision applications.
Enhanced Durability and Precision: Manufactured to P4A tolerance standards, this bearing guarantees exceptional dimensional accuracy and rotational precision. The open seal type allows for efficient lubrication management in controlled environments, maximizing performance.
7020 CD/HCP4AQBCA Bearing Typical Application Areas
This bearing is engineered for the most demanding high-precision and high-speed machinery, including:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and machining centers)
- Precision Grinding Spindles
- High-performance Robotic Drives
- Advanced Aerospace and Defense Systems
- Other applications requiring the ultimate in system rigidity, high speed, and precision.
