7220 ACDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Product Overview and Core Advantages
The 7220 ACDGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with a 25° contact angle and Extra Light (Class A) preload, it is engineered to handle combined loads efficiently, providing superior axial and radial load capacity in a compact design. Manufactured to the stringent P4A tolerance class, this bearing ensures minimal runout and vibration, making it ideal for high-precision and high-speed machinery where reliability is paramount.
7220 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design, optimized for combined loads. |
| DGA | Specific internal design and preload specification (Extra Light / Class A). |
| P4A | Super Precision tolerance class, exceeding ABEC 7 standards, for ultra-high running accuracy. |
Structural Features and Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and optimized internal geometry enable the bearing to support significant combined radial and axial loads. The Extra Light preload eliminates internal clearance, enhancing system stiffness and positioning accuracy.
- High-Speed Performance: The lightweight, durable phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 16,000 rpm. This makes it a true high-speed bearing.
- Precision Engineering: Manufactured to P4A tolerances with a bore and outside diameter tolerance of -0.004mm to 0, this bearing guarantees exceptional running precision and minimal vibration for sensitive applications.
- Universal Matching: Designed as a Universal Matchable (SU) bearing, it can be mounted in sets (typically in a 3-bearing set) to achieve even higher rigidity and load-sharing capabilities.
7220 ACDGA/P4A Bearing Typical Application Areas
The 7220 ACDGA/P4A is ideally suited for high-performance applications across various industries, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring utmost precision.
- Precision Grinding Spindles: Where minimal runout and thermal stability are critical.
- High-Frequency Motors and Spindles: In applications demanding high rotational speeds and accuracy.
- Aerospace and Defense Systems: In gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: Such as high-speed dental handpieces and imaging device rotors.
