S7020 CD/P4AQBCB
Sealed Super Precision Angular Contact Ball Bearings
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S7020 CD/P4AQBCB Bearing Product Overview & Core Advantages
The S7020 CD/P4AQBCB is a high-precision quadruplex matched bearing set designed for applications demanding exceptional rigidity and rotational accuracy. This metric angular contact ball bearing configuration, arranged in a back-to-back (QBC) quadruplex set, provides superior stability and can accommodate combined radial and axial loads. Manufactured to a P4A tolerance class, it ensures minimal runout and is ideal for high-speed, high-rigidity spindles and other precision machinery requiring uncompromising performance.
S7020 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7020 | Basic bearing designation (70 Series, 100mm bore, 150mm OD). |
| CD | Specifies a 15° contact angle and optimized internal geometry for high-speed operation. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7), ensuring tight dimensional and running accuracy. |
| QBC | Denotes a Quadruplex Back-to-Back matched set of four bearings, providing maximum system rigidity. |
| B | Specifies a Light preload applied to the matched set, reducing deflection and improving system stiffness. |
S7020 CD/P4AQBCB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity: The quadruplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and minimizes shaft deflection under heavy cutting forces or other operational stresses.
- Superior Load Capacity: Engineered to handle significant combined loads. The 15° contact angle is optimized for high-speed applications while maintaining excellent axial load-carrying capacity.
- Optimized High-Speed Performance: The phenolic resin cage offers low weight and excellent performance at high rotational speeds, contributing to the bearing's limiting speed of 10,000 rpm. The standard grease lubrication is suitable for this operational range.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing ensures precise shaft positioning and smooth, vibration-free operation.
S7020 CD/P4AQBCB Bearing Typical Application Areas
This precision bearing set is ideally suited for high-performance applications where accuracy, speed, and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- Industrial Robotics: High-accuracy rotary joints and arms.
- Aerospace & Defense: Gyroscopes, radar systems, and other critical navigation equipment.
