7020 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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7020 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7020 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stiffness and the ability to withstand combined radial and axial loads from both directions. Manufactured to P4A tolerance class with a light preload (Class B), it is engineered for high-speed operation and reliable performance in demanding precision machinery.
7020 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Basic bearing designation indicating bore diameter (100 mm), outside diameter (150 mm), and width (48 mm). |
| C | Specifies a 15° contact angle, optimized for high-speed applications with combined loads. |
| D | Indicates the bearing is part of a duplex (matched pair) set. |
| P4A | Denotes a high-precision tolerance class with enhanced running accuracy for spindle applications. |
| DB | Specifies the back-to-back mounting arrangement, providing high moment rigidity. |
| B | Indicates a light preload (Class B) for optimal stiffness and minimal friction. |
7020 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a rigid bearing system capable of handling significant combined radial and axial loads from both directions. This arrangement provides excellent resistance to moment loads, making it ideal for precision spindles.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior rotational accuracy.
High-Speed Capability: The phenolic resin cage and 15° contact angle are optimized for high-speed operation, enabling a limiting speed of 20,000 rpm while maintaining stability.
Enhanced Durability: Constructed from chrome steel for both rings and balls, this bearing offers excellent wear resistance and fatigue life, with a dynamic load rating of 30,375 lbf and static load rating of 38,250 lbf.
7020 CD/P4ADBB Bearing Typical Application Areas
The 7020 CD/P4ADBB is specifically engineered for high-precision applications requiring exceptional accuracy and rigidity, including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Gearboxes - Industrial transmission systems requiring minimal deflection
- High-Frequency Motors - Servo motors and spindle drives
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Components - Guidance systems and precision actuators
