7028 ACD/P4ADGD
7000 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
7028 ACD/P4ADGD Bearing Product Overview & Core Advantages
The 7028 ACD/P4ADGD is a precision double row angular contact ball bearing engineered for applications demanding exceptional rigidity and accuracy under combined loads. Designed with a 25° contact angle and Heavy Preload (Class D), it provides superior axial and radial load capacity in a single, compact unit. Manufactured to P4A tolerance class, this bearing is ideal for high-precision, high-stiffness systems requiring minimal runout and consistent performance. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs, simplifying installation and ensuring optimal load distribution.
7028 ACD/P4ADGD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7028 | Basic bearing series, indicating a 140mm bore, 210mm OD, and 66mm width. |
| ACD | Angular Contact, Double Row design for high rigidity and combined load capacity. |
| P4A | Indicates a high precision tolerance class, superior to ABEC 7, for applications requiring extreme running accuracy. |
| DGD | Specifies a Universal Matchable (SU) bearing set, where two bearings are supplied as a pre-matched pair for simplified mounting and optimal performance. |
7028 ACD/P4ADGD Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design and Heavy Preload provide maximum stiffness, effectively supporting combined radial and axial loads from both directions. With a dynamic load rating of 52,650 lbf and static load rating of 70,875 lbf, it ensures reliable operation in demanding conditions.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, OD, and width, this bearing guarantees minimal vibration and high rotational accuracy.
- Optimized High-Speed Operation: The lightweight, durable phenolic cage and optimized internal geometry contribute to a high limiting speed of 6,300 rpm, making it suitable for high-speed applications.
- Durability and Reliability: Constructed from chrome steel for both rings and balls, the bearing offers excellent wear resistance and long service life. It comes pre-lubricated for immediate operation.
7028 ACD/P4ADGD Bearing Typical Application Areas
The 7028 ACD/P4ADGD is ideally suited for high-performance machinery where precision, rigidity, and speed are critical. Key applications include:
- Machine Tool Spindles: For milling, grinding, and turning centers requiring high accuracy and stiffness.
- Precision Gearboxes: In industrial automation and robotics for precise power transmission.
- High-Speed Motors and Spindles: Where a combination of high RPM and load capacity is needed.
- Medical and Laboratory Equipment: For imaging systems and analytical instruments demanding smooth, precise rotation.
