728 CDGB/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
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
728 CDGB/P4A Bearing Product Overview & Core Advantages
The 728 CDGB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single bearing that is Universal Matchable (SU), it can be paired with another identical bearing to form a precisely preloaded set, offering superior rigidity and rotational accuracy. Its key advantages include the ability to handle combined loads (radial and axial), operation at high limiting speeds, and outstanding dimensional stability thanks to its P4A tolerance class. This makes it an ideal choice for high-reliability, high-precision machinery.
728 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 728 | Basic bearing series designation. |
| CDGB | Indicates a specific internal design, including a 15° contact angle and light preload (Class B), optimized for high rigidity and precision. |
| P4A | Denotes an ultra-high precision tolerance class, with extremely tight control over bore, outside diameter, and width tolerances for superior running accuracy. |
728 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design with a defined 15° contact angle and light preload provides excellent resistance to deflection under load, ensuring high system stiffness and precise shaft positioning.
- Superior High-Speed Capability: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling the bearing to achieve its high limiting speed of 220,000 rpm.
- Optimized Load Capacity: Engineered to support significant combined loads, efficiently carrying both radial and axial forces simultaneously.
- Universal Matching Design (SU): This feature allows for the creation of a matched set of two bearings, which simplifies installation and guarantees optimal preload and performance in duplex arrangements.
728 CDGB/P4A Bearing Typical Application Areas
The 728 CDGB/P4A is ideally suited for high-performance applications where precision and speed are critical. Common uses include:
- Machine Tool Spindles
- High-Frequency Spindles
- Precision Grinding Equipment
- Robotic Drives and Arms
- High-Speed Motors
