7228 ACD/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
7228 ACD/P4A Bearing Product Overview & Core Advantages
The 7228 ACD/P4A is a high-precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads, this bearing features a 25° contact angle optimized for high axial load capacity. Manufactured to P4 (ABEC-7) tolerance class, it delivers superior running accuracy and is preloaded for enhanced system stiffness and minimal deflection under operational stresses. Its compact design and premium material construction make it ideal for high-speed, high-reliability applications where precision is paramount.
7228 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7228 | Basic bearing series; 140 mm bore, 250 mm OD, 42 mm width |
| AC | Angular Contact design with 25° contact angle |
| D | High internal design with optimized ball complement |
| P4A | P4 precision tolerance (ABEC-7) with specific internal clearance and geometric accuracy |
7228 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design with phenolic cage and preload capability ensures maximum system stiffness and precise shaft positioning, critical for applications with minimal deflection requirements.
- Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing efficiently handles significant combined radial and axial loads (47,700 lbf dynamic / 51,300 lbf static ratings).
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components enable stable operation up to 7,500 rpm.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability, wear resistance, and consistent performance across the operating temperature range (-30° to 110°C).
7228 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- Precision Industrial Equipment: High-speed pumps, compressors, and gearboxes
- Robotics & Automation: Robot arm joints, precision positioning systems
- Aerospace & Defense: Gyroscopes, radar systems, and navigation equipment
- Medical Equipment: High-speed dental handpieces, laboratory centrifuges
