S7020 ACD/P4AQBCA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S7020 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The S7020 ACD/P4AQBCA is a precision quadruplex matched set of double row angular contact ball bearings designed for the most demanding applications. Its Quadruplex Back-to-Back (QBC) arrangement delivers exceptional system rigidity and moment load capacity, making it ideal for high-precision spindles. This bearing set is preloaded to Extra light / Class A specifications, ensuring smooth, low-vibration operation and superior running accuracy. Manufactured to a P4A tolerance class, it guarantees consistent, high-performance operation in high-speed and high-rigidity scenarios.
S7020 ACD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7020 | Basic bearing series and size designation. | Defines the core dimensions: 100mm bore, 150mm OD. |
| ACD | Angular Contact, Double Row design. | Enables high radial and bidirectional axial (combined) load capacity. |
| P4A | High-Precision Tolerance Class. | Exceeds standard ABEC 7/ISO P4 tolerances for superior running accuracy. |
| QBC | Quadruplex Back-to-Back arrangement. | Four bearings are precision-matched and mounted to provide maximum system stiffness. |
S7020 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The double row angular contact design, combined with the QBC matched set of four bearings, creates an extremely rigid bearing system capable of handling heavy combined loads (high radial and significant bidirectional axial loads) and moment loads with minimal deflection.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and smooth operation at the high limiting speed of 16,250 rpm. The 25° contact angle is optimized for high-speed stability.
Precision and Longevity: Manufactured from chrome steel and held to P4A tolerances, this set ensures minimal runout and consistent performance. The bearings are sealed and pre-lubricated with grease, protecting against contamination and providing reliable operation within a temperature range of -30°C to 110°C.
S7020 ACD/P4AQBCA Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is engineered for advanced machinery requiring ultimate performance and accuracy. Key applications include:
- High-Speed Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial Turbochargers
- Advanced Robotics and Automation Systems
