7020 CD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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7020 CD/P4ATBTB Bearing Product Overview & Core Advantages
The 7020 CD/P4ATBTB is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. Engineered for applications demanding the highest levels of rotational accuracy and rigidity, this pre-assembled set of three bearings is designed to handle combined loads (radial and axial) simultaneously. Its P4A tolerance class ensures exceptional dimensional and running accuracy, making it ideal for high-speed, high-precision machinery where stability and minimal runout are critical.
7020 CD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance |
|---|---|---|
| C | 15° Contact Angle | Optimized for carrying significant axial loads in one direction, while also supporting radial loads. |
| D | Light Preload (Class B) | Eliminates internal clearance, increasing system rigidity and improving rotational accuracy. |
| P4A | High Precision Tolerance Class | Exceeds standard ABEC 7/ISO P4 tolerances, ensuring superior running accuracy for the most demanding applications. |
| TBT | Triplex Back-to-Back Arrangement | A set of three bearings mounted back-to-back to withstand moment loads and provide maximum system rigidity. |
7020 CD/P4ATBTB Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The triplex back-to-back arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and significant moment loads. The light preload (Class B) further enhances this rigidity by removing internal clearance, which is critical for maintaining precision under load.
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly with minimal friction, contributing to the high limiting speed of 20,000 rpm. The standard lubrication is suitable for this operational range.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures predictable performance and precise shaft positioning.
Material Quality: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and a long operational life under demanding conditions.
7020 CD/P4ATBTB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where precision, rigidity, and speed are paramount.
- Precision Gearboxes: Applications requiring accurate shaft alignment and the ability to handle high axial and radial forces.
- High-Frequency Motors and Spindles: For CNC machinery and other automated equipment demanding minimal vibration and high rotational accuracy.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instruments.
