727 CD/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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727 CD/P4A Bearing Product Overview & Core Advantages
The 727 CD/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and high-speed performance. As a P4 (ABEC-7) precision class bearing, it is designed to provide superior running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. The 15° contact angle is optimized for high-speed operation, while the phenolic resin cage ensures smooth performance at elevated speeds. This bearing is pre-lubricated and available with a preload, making it an ideal, ready-to-install solution for high-precision, high-reliability machinery.
727 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 727 | Basic bearing series designation. |
| C | Specifies a 15° contact angle. |
| D | Indicates the bearing is manufactured with a high-precision preload. |
| P4 | Denotes the tolerance class P4 (ABEC-7), signifying very high dimensional and running accuracy. |
| A | Indicates that the bearing's internal geometry and tolerances have been optimized and are not according to standard ISO boundaries. |
727 CD/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a 15° contact angle and a lightweight, robust phenolic resin cage allows for a very high limiting speed of 120,000 rpm, minimizing centrifugal forces and friction.
- Precision & Rigidity: Manufactured to P4 precision class with a specified preload, this bearing provides exceptional running accuracy, minimizes shaft deflection, and enhances system rigidity for improved positional control.
- Combined Load Capacity: The angular contact design is inherently suited to support combined radial and axial loads simultaneously, making it more versatile than deep groove ball bearings in many applications.
- Material & Lubrication: Constructed from chrome steel for both rings and balls, ensuring high durability and fatigue resistance. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
727 CD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Instrumentation: Used in measuring devices, optical scanners, and laboratory equipment.
- High-Speed Motors and Spindles: Applications in PCB drilling, dental handpieces, and small turbochargers.
- Robotics: Critical for high-precision joints and arm assemblies where low friction and high responsiveness are required.
