7020 CD/P4ADBC
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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Product Overview and Core Advantages
The 7020 CD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement features a P4A tolerance class and a moderate preload (Class C), enabling it to handle combined radial and axial loads simultaneously with high stability. Manufactured from high-grade chrome steel and utilizing a phenolic cage, it is engineered for high-speed operation up to 20,000 rpm and reliable performance in precision machinery.
7020 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| C | 15° Contact Angle |
| D | Duplex / Matched Bearing Set |
| P4A | High Precision Tolerance Class (exceeding ABEC 7) |
| DB | Back-to-Back Arrangement for high moment rigidity |
Structural Features and Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) configuration creates a wide effective spread between load centers, significantly increasing the bearing's resistance to moment loads and providing exceptional system rigidity.
Superior Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing efficiently handles combined loads, offering a dynamic load rating of 30,375 lbf and a static load rating of 38,250 lbf.
Optimized High-Speed Performance: The lightweight phenolic cage ensures minimal centrifugal forces and excellent dimensional stability at high speeds, supporting the limiting speed of 20,000 rpm. The standard lubrication facilitates smooth operation across the entire speed range.
Precision Engineering: The P4A tolerance class guarantees tight dimensional control on bore, outside diameter, and width, ensuring precise shaft positioning and minimal runout for applications demanding the highest levels of accuracy.
7020 CD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Speed Precision Spindles in PCB drilling and routing equipment
- Industrial Pumps and Compressors requiring high rigidity and speed
- Robotic Arm Joints and Precision Gearboxes
- Medical and Laboratory Equipment spindles
