7013 CD/PA9AQBCA
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
7013 CD/PA9AQBCA Bearing Product Overview & Core Advantages
The 7013 CD/PA9AQBCA is a precision quadruplex matched set of angular contact ball bearings designed for the most demanding applications. This metric system bearing set is characterized by its extra light preload (Class A) and PA9A tolerance class, ensuring exceptional running accuracy and minimal vibration. Its core advantage lies in the back-to-back (QBC) arrangement of four bearings, which provides superior rigidity and stability when handling combined loads (radial and axial). The open design, combined with a phenolic cage, facilitates high-speed operation, making it ideal for high-precision, high-reliability machinery.
7013 CD/PA9AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7013 | Basic bearing designation indicating a 65 mm bore, 100 mm OD, and 18 mm single bearing width. |
| CD | Indicates a duplex bearing set with a specific internal clearance and preload. |
| PA9A | Denotes an extra high precision tolerance class (superior to ABEC 9), ensuring minimal runout and vibration. |
| QBC | Signifies a Quadruplex (4-bearing) Back-to-Back matched arrangement. This configuration maximizes moment rigidity. |
7013 CD/PA9AQBCA Bearing Structural Features & Performance Benefits
- Unmatched Rigidity and Stability: The quadruplex back-to-back (QBC) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision under heavy combined loads.
- High-Speed Capability: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction, reduced heat generation, and a high limiting speed of 24,000 rpm.
- Precision Performance: Manufactured to PA9A tolerance class with an extra light preload, this set guarantees smooth, quiet operation with extreme running accuracy, essential for applications where positioning repeatability is paramount.
- High Load Capacity: With a 15° contact angle and a dynamic load rating of 24,975 lbf, the bearing set is engineered to handle significant radial and bidirectional axial loads simultaneously.
- Optimized for Performance: The use of chrome steel for rings and balls ensures high durability and fatigue resistance. The open seal type allows for customized lubrication schemes to optimize performance for specific operating conditions.
7013 CD/PA9AQBCA Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically engineered for advanced machinery requiring ultimate performance, including:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial Pumps and Compressors with demanding shaft support requirements
- Advanced Robotics and Automation where precision motion control is critical
