S7020 CD/P4AQBCA
Sealed Super Precision Angular Contact Ball Bearings
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S7020 CD/P4AQBCA Bearing Product Overview & Core Advantages
The S7020 CD/P4AQBCA is a high-precision quadruplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set bearing excels at handling combined loads (radial and axial loads from both directions) simultaneously. Its P4A tolerance class ensures superior running accuracy, while the extra light preload minimizes deflection under operational stresses, making it ideal for high-speed spindles and other high-rigidity precision machinery.
S7020 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7020 | Basic bearing designation (bore diameter: 100 mm). |
| CD | Indicates a 15° contact angle, optimized for high-speed operation and high axial load capacity. |
| P4A | Specifies the high-precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
| QBC | Denotes the bearing arrangement: Quadruplex Back-to-Back. This configuration provides maximum rigidity against moment loads. |
| A | Specifies the extra light preload class, which minimizes friction and heat generation at high speeds. |
S7020 CD/P4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity: The quadruplex back-to-back (QBC) arrangement of four bearings creates an extremely stiff bearing system, effectively resisting complex combined loads and moment loads, which is critical for maintaining precision in machine tool spindles.
Superior Load Capacity: The 15° contact angle and optimized internal geometry provide excellent capacity for both radial and bidirectional axial loads, ensuring reliable performance under heavy-duty conditions.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the grease lubrication and sealed design ensure stable operation up to the limiting speed of 10,000 rpm.
Precision & Longevity: Manufactured to P4A tolerance class with chrome steel rings and balls, this bearing guarantees smooth, quiet, and vibration-free operation, extending the service life of the entire assembly.
S7020 CD/P4AQBCA Bearing Typical Application Areas
The S7020 CD/P4AQBCA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: High-torque, high-speed transmission systems.
- Industrial Pumps & Compressors: For handling significant axial and radial forces.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
- Robotics & Automation: High-accuracy robotic arms and CNC machinery.
