7220 ACD/P4ADBB
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
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7220 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 7220 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and rotational accuracy. This matched back-to-back (DB) arrangement is preloaded to Class B (Light) standards, providing superior stability and resistance to complex combined loads, including significant radial and axial forces in both directions. Manufactured to the exacting P4A tolerance class, it delivers the high running accuracy essential for high-speed and high-precision machinery. Its compact design and optimized internal geometry make it an ideal solution for spindles and other critical locations.
7220 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7220 | Basic bearing designation: 100 mm bore, 180 mm OD, 68 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two single bearings supplied as a matched set). |
| P4A | Tolerance class exceeding ABEC 7/ISO P4, with enhanced running accuracy requirements. |
| DB | Back-to-Back arrangement. This configuration provides high moment rigidity. |
| B | Specifies the preload level: Light (Class B). |
7220 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists tilting moments and shaft deflection, ensuring precise shaft positioning under heavy combined loads.
- Superior Load Capacity: With a 25° contact angle and robust construction using chrome steel rings and balls, this bearing is engineered to handle high radial and bidirectional axial loads simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 16,000 rpm. The open design allows for efficient lubrication management.
- Precision Engineering: Adherence to the P4A tolerance class and tight dimensional tolerances on the bore diameter, outside diameter, and width guarantees exceptional running accuracy and low vibration levels.
7220 ACD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles (Milling, Grinding, Turning)
- High-Frequency Motors and Spindles
- Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Rotary Axes
