728 ACD/P4A
Miniature 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
728 ACD/P4A Bearing Product Overview & Core Advantages
The 728 ACD/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. It is designed to accommodate combined loads, primarily handling significant axial loads in one direction while supporting radial loads. Its P4 (ABEC-7) tolerance class ensures exceptional running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing is pre-lubricated and features a phenolic cage, contributing to its high-speed capability and operational reliability.
728 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACD | Indicates a 25° contact angle and optimized internal geometry for high axial load capacity and rigidity. |
| P4A | Denotes a P4 (ABEC-7) tolerance class with specific running accuracy requirements for the inner and outer rings. |
728 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust construction enable the bearing to support high axial loads in one direction and significant radial loads simultaneously, providing excellent operational stability.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and pre-lubrication contribute to a high limiting speed of 100,000 rpm, making it suitable for demanding high-speed applications.
- Precision Engineering: Manufactured to P4 (ABEC-7) precision tolerance, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in precision machinery.
- Preload Availability: The bearing can be supplied with preload, which increases system rigidity, reduces deflection under load, and enhances positional accuracy.
728 ACD/P4A Bearing Typical Application Areas
The 728 ACD/P4A is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Speed Grinding and Milling Heads
- Precision Robotics and Automation Equipment
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Aerospace Actuation Systems
