7020 ACD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7020 ACD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 7020 ACD/HCP4AQBCA is a precision quadruplex matched set of Angular Contact Ball Bearings designed for the most demanding applications. This metric system bearing is characterized by its ability to handle combined loads—significant radial and thrust loads—simultaneously. Its Quadruplex Back-to-Back (QBC) arrangement provides exceptional rigidity and moment load capacity, making it ideal for high-precision, high-stability machinery. The use of ceramic balls and a P4A tolerance class ensures superior high-speed performance and operational accuracy.
7020 ACD/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Standard bearing series designation, indicating bore diameter (100 mm) and cross-section. |
| ACD | Angular Contact design with a 25° contact angle. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4A | Tolerance class equivalent to ABEC 7, denoting very high precision levels for bore, outside diameter, and width. |
| QBC | Quadruplex Back-to-Back arrangement. Four bearings are matched and preloaded in a back-to-back configuration. |
| A | Extra light preload class, optimized for minimal friction and very high speeds. |
7020 ACD/HCP4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) structure creates an extremely stiff bearing system capable of withstanding heavy combined loads and significant moment loads, which is critical for maintaining precision under operational stress.
Superior High-Speed Performance: The combination of hybrid ceramic balls (lighter than steel, reducing centrifugal force) and a lightweight, robust phenolic cage allows this bearing set to achieve a high limiting speed of 15,000 rpm. The 25° contact angle provides an excellent balance between radial and axial load capacity for high-speed applications.
Precision and Longevity: Manufactured to P4A precision class with tight dimensional tolerances, this bearing ensures minimal runout and vibration. The open seal design, combined with factory lubrication, is optimized for clean, high-speed environments, reducing friction and heat generation.
7020 ACD/HCP4AQBCA Bearing Typical Application Areas
The 7020 ACD/HCP4AQBCA is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where extreme accuracy and minimal deflection are required.
- High-Frequency Motors and Spindles: Used in PCB drilling and other high-RPM applications.
- Aerospace and Defense Systems: Including gyroscopes and other precision instrumentation.
