S7021 CD/P4AQBCB
Sealed Super Precision Angular Contact Ball Bearings
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S7021 CD/P4AQBCB Bearing Product Overview & Core Advantages
The S7021 CD/P4AQBCB is a high-precision quadruplex back-to-back angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This P4A tolerance class metric bearing features a sealed design with phenolic cage and grease lubrication, enabling it to handle significant combined radial and axial loads simultaneously. Its matched quadruplex arrangement provides superior stiffness and stability, making it ideal for high-speed, high-precision machinery where minimal deflection is critical.
S7021 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| S7021 | Basic bearing designation | Standard size reference (105mm bore, 160mm OD) |
| CD | 15° contact angle design | Optimized for combined loading conditions |
| P4A | High precision tolerance class | Superior running accuracy for precision applications |
| QBC | Quadruplex Back-to-Back arrangement | Maximum rigidity and moment load capacity |
S7021 CD/P4AQBCB Bearing Structural Features & Performance Benefits
Enhanced Rigidity: The quadruplex back-to-back configuration creates an extremely rigid bearing system that minimizes shaft deflection under heavy loads and high moment forces, ensuring precise positioning accuracy.
Superior Load Capacity: With a radial dynamic load rating of 57,375 lbf and static load rating of 87,750 lbf, this bearing excels in handling demanding combined loading scenarios while maintaining performance integrity.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and smooth operation at the limiting speed of 10,000 rpm, while the optimized 15° contact angle balances speed and load capacity.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional control (bore tolerance: -0.004mm to 0), this bearing ensures consistent high-precision performance in critical applications.
S7021 CD/P4AQBCB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision boring machines requiring exceptional rigidity and accuracy
- Precision Gearboxes: Industrial gear drives and transmission systems where high load capacity and minimal deflection are essential
- Robotics and Automation: High-precision robotic arms, CNC positioning systems, and automated manufacturing equipment
- Aerospace Components: Aircraft control systems, auxiliary power units, and precision aerospace mechanisms
- Medical Equipment: High-speed dental handpieces, medical imaging devices, and surgical robotics requiring reliable precision performance
