7020 ACEGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7020 ACEGA/P4A Bearing Product Overview & Core Advantages
The 7020 ACEGA/P4A is a single-row angular contact ball bearing designed for the most demanding high-precision applications. Engineered to accommodate combined radial and axial loads simultaneously, this bearing features an extra light preload (Class A) and a universal matching (SU) designation, allowing for precise bearing arrangement in sets for optimal rigidity and rotational accuracy. Its P4A tolerance class ensures exceptional dimensional and running accuracy, making it ideal for high-speed spindles and other machinery requiring superior performance and reliability.
7020 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Basic bearing designation indicating a 100 mm bore and 150 mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle for efficient axial load carrying capacity. |
| EGA | Indicates the bearing is part of a universally matchable (SU) set with an extra light preload (Class A). |
| P4A | Specifies a very high tolerance class for dimensional and running accuracy, exceeding ABEC 7/ISO P4 standards. |
7020 ACEGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a lightweight phenolic cage and precision-ground chrome steel components enables a high limiting speed of 20,000 rpm, minimizing centrifugal forces and operational friction.
Superior Rigidity & Load Capacity: The 25° contact angle and high-grade material construction provide excellent resistance to combined loads, ensuring stable operation under demanding conditions. The radial dynamic load rating of 9518 lbf and static load rating of 8550 lbf attest to its robust performance.
Precision & Universal Matching: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration. Its universal matchable (SU) characteristic allows for flexible arrangement in pairs or sets (up to 4 bearings) to achieve specific preload and stiffness requirements without selective mounting.
7020 ACEGA/P4A Bearing Typical Application Areas
The 7020 ACEGA/P4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotic Drives
- High-Frequency Motors
- Aerospace & Defense Positioning Systems
- Medical & Dental Equipment Spindles
