7020 CE/P4A
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 CE/P4A Bearing Product Overview & Core Advantages
The 7020 CE/P4A is a single row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Characterized by a 15° contact angle and P4 (ABEC-7) tolerance class, this bearing is designed to accommodate high axial loads in one direction while simultaneously supporting substantial radial loads. Its phenolic resin cage and optimized internal geometry contribute to exceptional high-speed performance, making it an ideal choice for machine tool spindles and other precision machinery where rigidity and rotational accuracy are paramount.
7020 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Significance |
|---|---|---|
| C | 15° Contact Angle | Optimized for high axial load capacity and moderate radial loads. |
| E | Optimized Internal Design | Features a larger ball complement and reinforced shoulders for increased load rating and rigidity. |
| P4 | Tolerance Class (ABEC-7) | Guarantees extremely tight dimensional and running accuracy for high-precision applications. |
| A | Preload (Light) | Supplied with a light preload to minimize axial play, enhancing system rigidity and rotational precision. |
7020 CE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The E-type design incorporates a larger number of balls (27 balls) and optimized raceway geometry, significantly boosting both the radial dynamic load rating (10,102 lbf) and static load rating (9,000 lbf). This design ensures stable operation under combined loads.
- Superior High-Speed Performance: The lightweight and robust phenolic resin cage ensures excellent dimensional stability and low friction at high rotational speeds, supporting a limiting speed of 19,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance class with a 15° contact angle, this bearing delivers exceptional running accuracy and low noise levels, which is critical for precision spindles.
- Material Quality: Constructed from high-grade chrome steel for both rings and balls, ensuring long service life and consistent performance under demanding conditions.
7020 CE/P4A Bearing Typical Application Areas
The 7020 CE/P4A is ideally suited for high-performance applications requiring precision and speed, including:
- Machine Tool Spindles (CNC machining centers, grinding spindles)
- High-Frequency Motors
- Precision Instrumentation
- Medical Equipment Spindles
- Aerospace Control Systems
