7020 ACE/P4AQBTA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7020 ACE/P4AQBTA Bearing Product Overview & Core Advantages
The 7020 ACE/P4AQBTA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This quadruplex matched set features an Extra Light (Class A) preload and P4A tolerance class, delivering superior rotational precision and dimensional stability. Its 25° contact angle and tandem back-to-back arrangement (QBT) are optimized to handle significant combined loads while maintaining high running accuracy in high-speed applications up to 20,000 rpm.
7020 ACE/P4AQBTA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACE | 25° Contact Angle, Extra Light Preload | Optimized for high-speed operation with minimal friction |
| P4A | High Precision Tolerance Class | Superior dimensional accuracy and running precision |
| QBT | Quadruplex Tandem Back-to-Back Arrangement | Enhanced rigidity and moment load capacity |
7020 ACE/P4AQBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex matched set with tandem back-to-back arrangement provides exceptional stiffness, capable of handling combined radial and axial loads simultaneously. With a radial dynamic load rating of 25,200 lbf and static load rating of 33,750 lbf, this bearing offers reliable performance under heavy loading conditions.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), ensuring precise fitment and minimal runout. The phenolic cage material provides excellent strength-to-weight ratio and smooth operation at high speeds.
High-Speed Capability: Designed for limiting speeds up to 20,000 rpm, featuring 27 chrome steel balls with 12.7 mm diameter and optimized internal geometry. The 25° contact angle and extra light preload minimize friction and heat generation during high-speed operation.
Material Excellence: Constructed from chrome steel for both rings and balls, providing superior hardness, wear resistance, and fatigue life. The bearing comes pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
7020 ACE/P4AQBTA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring extreme accuracy
- High-Speed Spindles: CNC machining equipment and precision grinding applications
- Industrial Pumps & Compressors: Applications demanding high rigidity and reliability
- Precision Instrumentation: Medical equipment and measuring devices requiring minimal vibration
- Aerospace Components: Guidance systems and flight control mechanisms
- Robotics & Automation: High-precision robotic arms and positioning systems
