7020 ACDGC/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7020 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7020 ACDGC/P4A is a high-precision single row angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to a P4A tolerance class, it offers superior running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate high combined loads, efficiently supporting significant radial loads and axial loads in one direction simultaneously. The 25° contact angle and universal matching (SU) designation make it ideal for preloaded duplex arrangements, providing high system rigidity and rotational precision in high-speed machinery.
7020 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 7020 | Basic Bearing Series & Size | Denotes a 100 mm bore, 150 mm OD, 24 mm width bearing from the 70-series. |
| AC | Angular Contact | The bearing is designed for combined (radial and axial) loads. |
| DGC | Contact Angle & Cage | Specifies a 25° contact angle and a phenolic resin cage, beneficial for high-speed operation. |
| P4A | Tolerance Class | Indicates a high-precision grade with very tight dimensional and running accuracy tolerances. |
7020 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row design with a 25° contact angle is optimized to handle high combined loads. With a dynamic load rating of 17,842 lbf and a static load rating of 18,000 lbf, it provides robust performance in demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and open seal type contribute to a high limiting speed of 16,000 rpm, making it an excellent high-speed bearing.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing ensures minimal runout and vibration, which is critical for precision applications.
- Universal Matching (SU): This feature allows two identical bearings to be universally matched in a duplex set (e.g., DB or DF) to achieve preload and enhanced system stiffness without selective grinding.
7020 ACDGC/P4A Bearing Typical Application Areas
The 7020 ACDGC/P4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
