7020 ACDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7020 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7020 ACDGA/P4A is a single-row angular contact ball bearing engineered for ultra-high precision and performance in demanding applications. Positioned within the P4A super-precision tolerance class, it delivers exceptional running accuracy and rotational stability. Its key advantage lies in its ability to accommodate high combined loads (radial and axial) simultaneously, thanks to its 25° contact angle. The bearing is supplied universally matchable (SU), allowing two bearings to be precisely paired for optimal preload and rigidity in a duplex arrangement. This design, combined with a lightweight phenolic cage, makes it an ideal choice for high-speed spindles and other machinery requiring maximum precision and reliability.
7020 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Basic bearing series, indicating a 100mm bore, 150mm OD, and 24mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Specific internal design and manufacturing features for high performance. |
| P4A | Denotes a super-precision tolerance class with running accuracy requirements tighter than ABEC 7/ISO P4. |
7020 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle is optimized to support significant combined radial and axial loads. The universal matchable (SU) feature allows for precise preloading in pairs, dramatically increasing system rigidity.
- Super-Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for achieving superior surface finishes and positional accuracy in precision equipment.
- High-Speed Capability: The lightweight phenolic cage reduces centrifugal forces and allows for a high limiting speed of 16,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
- Optimized Internal Geometry: Precision-ground chrome steel rings and balls, along with optimized raceway geometry, contribute to low noise, low torque, and an extended service life.
7020 ACDGA/P4A Bearing Typical Application Areas
The 7020 ACDGA/P4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal, external, and surface grinding machines.
- High-Frequency Motors and Spindles: PCB drilling and routing spindles.
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instruments.
